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Home My WebLink About20202156.tiff COLORADO • i of Reclamai RECEIVED C DNR MDiv iningsion and Safety t on, Department of Natural Resources JUL 3 6 2020 1313 Sherman St. Room 215 Denver, CO 80203 WELD COUNTY COMMISSIONERS NOTICE Consideration of Construction Materials Reclamation Permit Amendment Application DATE: July 8,2020 TO: Weld County Commissioners 915 10th St Greeley, CO 80631 FROM: Eric C. Scott RE: Inouye Gravel Mine-File No.M-2018-037,BURNCO Colorado,LLC Amendment Application(AM-1) Please be advised that on July 6,2020,BURNCO Colorado,LLC,whose address and telephone number are 301 Centennial Drive,Milliken,CO 80543; (970)587-7277, filed an application for a/an Amendment (AM- 1)to M2018037,Inouye Gravel Mine,which is located at approximately Section 6,Township 3N, Range 66W, 06th Principle Meridian, in Weld County. Add 58.9 acres to permit area and revise mining and reclamation plans accordingly The application decision is scheduled for October 5,2020. Written comments or objections to the application maybe submitted to and additional information obtained from Eric C. Scott at the Division of Reclamation,Mining and Safety, 1313 Sherman St. Room 215 Denver, CO 80203,by telephone at(303) 866-3567 x 8140. BURNCO Colorado,LLC is required to publish a public notice in a newspaper of general circulation in the locality of the mining operation. If you wish to make comments on or objections to the mine plan and/or the reclamation plan,they must be submitted within twenty(20)days of the date of the last newspaper public notice to be considered in the application review process by the Division.You should contact the applicant for the newspaper publication date.If we do not receive your comments or any objection by the end of the public comment period,the Division will assume you have no objection or comment to the proposed activity. M-GR-03A-P PC)blic RAI Iatt, CC:PL.CTP), aoao -.DISC2 PwCe.RICHA.7M /C(S) O8131/,2O OV2.6/2.o _ _ e:c,„_,,,,‘ 1313 Sherman St. Room 215 Denver, CO 80203 P (303)866-3567 F(303)832-8106 https://colorado.gov/drms ov/drms '' 0 P t4.. Jared Polis,Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director `� :- *// June 17, 2020 Clerk to the Board of Weld County Commissioners VIA:Certified Mail/Hand Delivered 1150 O Street P.O. Box 758 Greeley, CO 80631 RE: Division of Reclamation Mining and Safety, Mine Land Reclamation Board(112)Operation Reclamation Permit Amendment Application,Weld County,Colorado; Inouye Gravel Mine— WWTP Amendment AM01. Dear Clerk to the Board: As a requirement of the Division of Reclamation Mining and Safety(DRMS), the complete Inouye, Gravel Mine Ft. Lupton WWTP Amendment AM01 application must be on file at the County Clerk's Office and be available for public viewing. A copy of the complete application on behalf of Burnco Colorado, LLC is attached. Please sign below to indicate that you have received the above-mentioned information. As always, thank you for your assistance. Sincerely, Civil Resources, LLC dy odriguez, P.E. Project Engineer Confirmation of Receipt: I have received the above reference documents, and will put it on file for public viewing. RECEIVED County Clerk to the Board JUN 7 2020 Date WELD COUNTY COMMISSIONERS J:1ft.lupton\WWTP\DRMSlletter to clerk_signature reqted.doc Publ . G ReV:e CC:pLUP),rwcshiER/cHico 2020-2156 O7/2..2_/.2O 07/16/20 BURNCO COLORADO, LLC INOUYE GRAVEL MINE - WWTP AMENDMENT - AM01 DRMS 112 PERMIT SUBMITTAL M-2018-038- AM01 PREPARED FOR: Burnco Colorado, LLC 301 Centennial Drive Milliken, CO 80543 PREPARED BY: Civil Resources, LLC 323 5th Street P.O. Box 680 Frederick, CO 80530 303.833.1416 DATE SUBMITTED TO DRMS: JUNE 16,2020 STATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St.,Room 215 Denver,Colorado 80203 COLORADO DIVISION OF Phone:(303)866-3567 RECLAMATION FAX:(303)832-8106 MINING -&- SAFETY CONSTRUCTION MATERIALS REGULAR(112)OPERATION RECLAMATION PERMIT APPLICATION FORM CHECK ONE:n There is a File Number Already Assigned to this Operation Permit# M - 218 037 (Please reference the file number currently assigned to this operation) New Application(Rule 1.4.5) el Amendment Application(Rule 1.10) Conversion Application(Rule 1.11) Permit# M 2018 Q37 vol (provide for Amendments and Conversions of existing permits) The application for a Construction Materials Regular 112 Operation Reclamation Permit contains three major parts: (1)the application form;(2)Exhibits A-S,Addendum 1,any sections of Exhibit 6.5(Geotechnical Stability Exhibit;and(3)the application fee. When you submit your application, be sure to include one (1) complete signed and notarized ORIGINAL and one (1) copy of the completed application form,two(2)copies of Exhibits A-S,Addendum 1,appropriate sections of 6.5(Geotechnical Stability Exhibit,and a check for the application fee described under Section(4)below. Exhibits should NOT be bound or in a 3-ring binder;maps should be folded to 8 1/2"X 11"or 8 1/2"X 14"size. To expedite processing,please provide the information in the format and order described in this form. GENERAL OPERATION INFORMATION Type or print clearly,in the space provided,ALL information requested below. 1. Applicant/operator or company name(name to be used on permit): BURNCO COLORADO LLC 1.1 Type of organization(corporation,partnership,etc.): LLC 2. Operation name(pit,mine or site name): Inouye Gravel Mine/WWTP Amendment 3. Permitted acreage(new or existing site): 120 permitted acres 3.1 Change in acreage(+) 58.9 acres 3.2 Total acreage in Permit area 178.9 acres 4. Fees: 4.1 New Application $2,696.00 application fee 4.2 New Quarry Application $3,342.00 quarry application 4.4 Amendment Fee $2,229.00 amendment fee 4.5 Conversion to 112 operation(set by statute) $2,696.00 conversion fee 5. Primary comoditie(s)to be mined: sand gravel top soil m 5.1 Incidental commoditie(s)to be mined: 1. - lbs/Tons/yr 2. / lbs/Tons/yr 3. / lbs/Tons/yr 4. / lbs/Tons/yr 5. / lbs/Tons/yr 5.2 Anticipated end use of primary commoditie(s)to be mined: building materials 5.3 Anticipated end use of incidental commoditie(s)to be mined: -2- 6. Name of owner of subsurface rights of affected land: Ft. Lupton Waste Water Treatment Plant If 2 or more owners,"refer to Exhibit O". 7. Name of owner of surface of affected land: Ft. Lupton Waste Water Treatment Plant 8. Type of mining operation: El Surface El Underground 9. Location Information: The center of the area where the majority of mining will occur: COUNTY: Weld PRINCIPAL MERIDIAN(check one): IS 6th(Colorado) 10th(New Mexico) fa Ute SECTION(write number): S 31 TOWNSHIP(write number and check direction): T 2 El North South RANGE(write number and check direction): R 66 Q East E}West QUARTER SECTION(check one): ID SW QUARTER/QUARTER SECTION(check one): ® NE NW SE SW GENERAL DESCRIPTION:(the number of miles and direction from the nearest town and the approximate elevation): Located in the City of Fort Lupton, north of HWY 52 and south of the Inouye Gravel Mine 10. Primary Mine Entrance Location(report in either Latitude/Longitude OR UTM): Latitude/Longitude: Example: (N) 39° 44' 12.98" (W) 104° 59' 3.87" Latitude(N): deg min sec (2 decimal places) Longitude(W): deg min sec (2 decimal places) OR Example: (N) 39.73691° (W) -104.98449° Latitude(N) (5 decimal places) Longitude(W) (5 decimal places) OR Universal Tranverse Mercator(UTM) Example: 201336.3 E NAD27 Zone 13 4398351.2 N UTM Datum(specify NAD27,NAD83 or WGS 84) Nad 83 Zone 13 Easting 515128.07 m E Northing 4437651.38 m N -3- 11. Correspondence Information: APPLICANT/OPERATOR (name,address,and phone of name to be used on permit) Contact's Name: Mark Johnson Title: Compliance Manager/Facilities and Acquisitions Company Name: Burnco Colorado, LLC Street/P.O.Box: 301 Centennial P.O.Box: City: Milliken State: Colorado Zip Code: 80543 Telephone Number: (970 )_ 587 7277 Fax Number: ( )- PERMITTING CONTACT (if different from applicant/operator above) Contact's Name: Andy Rodriguez Title: Project Manager Company Name: Civil Resources Street/P.O.Box: 323 5th Street P.O.Box: 680 City: Frederick State: Colorado Zip Code: 80530 Telephone Number: (303 )_ 833 1416 Fax Number: ( )- INSPECTION CONTACT Contact's Name: Mark Johnson Title: Compliance Manager/Facilities and Acquisitions Company Name: Burnco Colorado, LLC Street/P.O.Box: 301 Centennial P.O.Box: City: Milliken State: Colorado Zip Code: 80543 Telephone Number: (970 )_ 587 7277 Fax Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: Street: City: State: Zip Code: Telephone Number: ( )- CC: STATE OR FEDERAL LANDOWNER(if any) Agency: Street: City: State: Zip Code: Telephone Number: ( )- -4- 12. Prima future(Post-mining)land use(check one): Cropland(CR) fj Pastureland(PL) 1:1General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) JJ Recreation(RC) Industrial/Commercial(IC) Developed Water Resources(WR) jj Solid Waste Disposal(WD) 13. Primary present land use(check one : Cropland(CR) Pastureland(PL) General Agriculture(GA) Rangeland(RL) Forestry(FR) Wildlife Habitat(WL) Residential(RS) fJ Recreation(RC) II Industrial/Commercial(IC) Developed Water Resources(WR) 14. Method of Mining: Briefly explain mining method(e.g.truck/shovel): slurry wall and dry mine using excavator, haul truck, loader and conveyor belts 15. On Site Processing: F7 Crushing/Screening 13.1 Briefly explain mining method(e.g.truck/shovel): processing will occur on the main Inouye Gravel mine site. List any designated chemicals or acid-producing materials to be used or stored within permit area: NA 16. Description of Amendment or Conversion: If you are amending or converting an existing operation,provide a brief narrative describing the proposed change(s). Additional land to the south of the existing Inouye Gravel mine to be used to haul material to the Inouye Gravel Mine to produce crushed rock, top soil, sand and gravel and building materials. -5- Maps and Exhibits: Two(2)complete,unbound application packages must be submitted. One complete application package consists of a signed application form and the set of maps and exhibits referenced below as Exhibits A-S,Addendum 1,and the Geotechnical Stability Exhibit. Each exhibit within the application must be presented as a separate section. Begin each exhibit on a new page. Pages should be numbered consecutively for ease of reference. If separate documents are used as appendices,please reference these by name in the exhibit. With each of the two (2) signed application forms, you must submit a corresponding set of the maps and exhibits as described in the following references to Rule 6.4,6.5,and 1.6.2(1)(b): EXHIBIT A Legal Description EXHIBIT B Index Map EXHIBIT C Pre-Mining and Mining Plan Map(s)of Affected Lands EXHIBIT D Mining Plan EXHIBIT E Reclamation Plan EXHIBIT F Reclamation Plan Map EXHIBIT G Water Information EXHIBIT H Wildlife Information EXHIBIT I Soils Information EXHIBIT J Vegetation Information EXHIBIT K Climate Information EXHIBIT L Reclamation Costs EXHIBIT M Other Permits and Licenses EXHIBIT N Source of Legal Right-To-Enter EXHIBIT O Owners of Record of Affected Land(Surface Area)and Owners of Substance to be Mined EXHIBIT P Municipalities Within Two Miles EXHIBIT Q Proof of Mailing of Notices to County Commissioners and Conservation District EXHIBIT R Proof of Filing with County Clerk or Recorder EXHIBIT S Permanent Man-Made Structures Rule 1.6.2(1)(b) ADDENDUM 1 -Notice Requirements(sample enclosed) Rule 6.5 Geotechnical Stability Exhibit(any required sections) The instructions for preparing Exhibits A-S,Addendum 1,and Geotechnical Stability Exhibit are specified under Rule 6.4 and 6.5 and Rule 1.6.2(1)(b)of the Rules and Regulations. If you have any questions on preparing the Exhibits or content of the information required, or would like to schedule a pre-application meeting you may contact the Office at 303-866-3567. Responsibilities as a Permittee: Upon application approval and permit issuance,this application becomes a legally binding document. Therefore,there are a number of important requirements which you,as a permittee, should fully understand. These requirements are listed below. Please read and initial each requirement,in the space provided,to acknowledge that you understand your obligations. If you do not understand these obligations then please contact this Office for a full explanation. 1. Your obligation to reclaim the site is not limited to the amount of the fmancial warranty. You assume legal liability for all reasonable expenses which the Board or the Office may incur to reclaim the affected lands associated with your mining operation in the event your permit is revoked and financial warranty is forfeited; -6- 2. The Board may suspend or revoke this permit, or assess a civil penalty, upon a finding that the permittee violated the terms or conditions of this permit, the Act,the Mineral Rules and Regulations, or that information contained in the application or your permit misrepresent important material facts; 3. If your mining and reclamation operations affect areas beyond the boundaries of an approved permit boundary, substantial civil penalties,to you as permittee can result; 4. Any modification to the approved mining and reclamation plan from those described in your approved application requires you to submit a permit modification and obtain approval from the Board or Office; 5. It is your responsibility to notify the Office of any changes in your address or phone number; 6. Upon permit issuance and prior to beginning on-site mining activity,you must post a sign at the entrance of the mine site,which shall be clearly visible from the access road,with the following information(Rule 3.1.12): a. the name of the operator; b. a statement that a reclamation permit for the operation has been issued by the Colorado Mined Land Reclamation Board; and, c. the permit number. 7. The boundaries of the permit boundary area must be marked by monuments or other markers that are clearly visible and adequate to delineate such boundaries prior to site disturbance. 8. It is a provision of this permit that the operations will be conducted in accordance with the terms and conditions listed in your application,as well as with the provisions of the Act and the Construction Material Rules and Regulations in effect at the time the permit is issued. 9. Annually,on the anniversary date of permit issuance,you must submit an annual fee as specified by Statute, and an annual report which includes a map describing the acreage affected and the acreage reclaimed to date(if there are changes from the previous year), any monitoring required by the Reclamation Plan to be submitted annually on the anniversary date of the permit approval. Annual fees are for the previous year a permit is held. For example,a permit with the anniversary date of July 1,1995,the annual fee is for the period of July 1, 1994 through June 30, 1995. Failure to submit your annual fee and report by the permit anniversary date may result in a civil penalty, revocation of your permit, and forfeiture of your fmancial warranty. It is your responsibility, as the permittee,to continue to pay your annual fee to the Office until the Board releases you from your total reclamation responsibility. 10. For joint venture/partnership operators:the signing representative is authorized to sign this document and a power of attorney(provided by the partner(s)) authorizing the signature of the representative is attached to this application. - 8 - Certification: As an authorized representative of the applicant, I hereby certify that the operation described has met the minimum requirements of the following terms and conditions: 1. To the best of my knowledge,all significant,valuable and permanent man-made structure(s)in existence at the time this application is filed,and located within 200 feet of the proposed affected area have been identified in this application (Section 34-32.5-115(4)(e),C.R.S.). 2. No mining operation will be located on lands where such operations are prohibited by law (Section 34-32.5-115(4)(f), C.R.S.; 3. As the applicant/operator,I do not have any extraction/exploration operations in the State of Colorado currently in violation of the provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials (Section 34-32.5-120,C.R.S.)as determined through a Board fmding. 4. I understand that statements in the application are being made under penalty of perjury and that false statements made herein are punishable as a Class 1 misdemeanor pursuant to Section 18-8-503,C.R.S. This form has been approved by the Mined Land Reclamation Board pursuant to section 34-32.5-112,C.R.S.,of the Colorado Land Reclamation Act for the Extraction of Construction Materials. Any alteration or modification of this form shall result in voiding any permit issued on the altered or modified form and subject the operator to cease and desist orders and civil penalties for operating without a permit pursuant to section 34-32.5-123,C.R.S. Signed and dated this day of If Corporation Attest(Seal) Applicant/Operator or Company Name Signed: Signed: Corporate Secretary or Equivalent Title: Town/City/County Clerk State of ) ) ss. County of ) The foregoing instrument was acknowledged before me this day of by as of Notary Public My Commission expires: SIGNATURES MUST BE IN BLUE INK You must post sufficient Notices at the location of the proposed mine site to clearly identify the site as the location of a EXHIBIT A- LEGAL DESCRIPTION This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.1 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: LAND PARCEL DESCRIPTION Main Inouye Permit Boundary: THE NORTH HALF OF THE SOUTHWEST QUARTER(N1/2 SW1/4) OF SECTION THIRTY-ONE (31), TOWNSHIP TWO NORTH (T.2N.), RANGE SIXTY-SIX WEST(R.66W.)AND THE EAST 60 ACRES OF THE EAST HALF OF THE SOUTHEAST QUARTER(E1/2 SE1/4) OF SECTION THIRTY-SIX(36), TOWNSHIP TWO NORTH (T.2N.), RANGE SIXTY-SEVEN WEST(R.67W.) OF THE SIXTH PRINCIPAL MERIDIAN (6TH P.M.), COUNTY OF WELD, STATE OF COLORADO. EXCEPTING THEREFROM: 1) THAT PARCEL OF LAND DESCRIBED IN THAT QUITCLAIM DEED RECORDED AUGUST 3, 1993 AS RECEPTION NO. 02344482 OF THE RECORDS OF THE WELD COUNTY CLERK AND RECORDER. 2) BLANKET TRAIL EASEMENT AGREEMENT, REC. NO. 4233870 The current permit boundary contains 120 acres, more of less (±). Amended WWTP Permit Boundary: The Southeast Quarter of the Southwest Quarter of Section 31,Township 2 North, Range 66 West North PARCEL: FTL 16237 SE4SW4 31 2 66 The north parcel contains 40 acres. SOUTH PARCEL: FTL 15812-A PT E2NW4 61 66(WESTSIDE ANNEX) BEG S89D57'E 1451.85' OF NW COR SEC S89D57'E 1334.95'S0D53'W 108.63'TO W LN HWY 85 BYPASS S15D03'W 61.98' SO4D25'W 453'S05D59'W 383.1' N89D27'E 49.8' S0D27'E 309' S09D13'W 1287.7'TO N LN HWY 52 S88D23'W 1045.47'TO PT 46.96' N01 D01'W OF SW COR E2NW4 N01 D01'W 528.04' N88D58'E 165' N01 D01'W 264'S88D58'W 165' N01 D01'W 1819.39'TO BEG The south parcel permit boundary excludes 53.06 acres on the south and contains 18.94 acres. 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LUPTON WWTP AMENDMENT WELD COUNTY; COLORADO , _ I y+y 'T:a'5.` iS ok 'YY _ Yr ' - 'wL -1'� n-,,,..ae ��k "F .-'' x tr— G_+a,!..tvv .'-' ,.,,,‘,.:1,7,11( „ +(: ,TYy�"J' :y it „�3 it,ttr4r,s ^a1 4 ,;'.,,e--,1.,,,,,,-,-,f�rr�d.+V1r ,Ats n - , t;`.---i4. 7'° � ' ,.,,,;1.: -'7 ,tY'e7 , l'ii— .4Tf,"044 ' �:r'A`l N.' r5"a;i fp'Y1-7r., y rk-P .a.u' ` a°.r�„a•AiT f'� ;'T��.. v.' . � t,¢'t+' A {..+s ,rte 'k,�,�" � �' i`� �x+��'��r4. la re sPERMIT BOUNDARY DESCRIPTION: ;t y 1", ( 4 ` �T fir ' ° „ tvkfT , �,r�r�,, t 1 ` r , , r�w0,v- 1 fiI ,,1 Ay I 'b.� ! C' '-��f r ] : Ir 8tk�+ ₹ " f" �wf` 4n fi{+��0�� r p i � �>✓� i x ''" t r- n�, e ( .4,''- -' �I �� . d� i .x �±,4 Mb s ,,,m..1, �' m,. r 3+ 2 t. - uY 4, . ..-1.1-k{S''`"'sy , .: ' i,� t' 3 r� �,., ter r>_ +r t$, a'y�-.. 13-614,z1 r�'k °Vr �.u'r :+1V h1 +. 4j i �..,it �'� '""�")�� bt��^ "r{, o+4..x�„�+.tTHE NORTH HALF OF THE SOUTHWEST QUARTER(N112 SW1/4)OF SECTION THIRTY-ONE(31),TOWNSHIP TWO �R� [ , 13, " XS ,yey 3;t 't y �� f+ d �,y nr A �'r''tc�.x ��Pa "''h a,"-w„ r ...—,/L -tt t5 ,$'+.a'�.vr).ty r� '' -2 + °F�2NORTH R 2N)RANGE S E SOU X WEST Q AR)AND THE EAST 60 ACRES OF THE EAST HALF OF THE ,rx " .,�3e:,., `y }, + « `: :'' i.it ��_ s'� ';+ Zctrt l 45,,. `;:pSOUTHEAST QUARTER E112 SE114 OF SECTION THIRTYSIX 36 TOWNSHIP TWO NORTH 2N RANGE �{ �? " " srr%iatirt�" r -`; ° ` r^� "+'" * "ei�'�'' _ x( ) ( ) R ) W �k", a 'Y L;,5 ^tMY ,-i t# ..+r ',S-M�.e , +ty` ti '5�7' �S 4"�+1' 5+' s` 't^rt*�`�t' d.'.J`a+ ''+SIXTYSEVEN WEST(R 67W)OF THE SIXTH PRINCIPAL MERIDIAN(6TH P M)COUNTY OF WELD STATE OF ,,, arvn, 1.., YA-4 t"t" c v ` ++ + J t .1?S',} a$ s ,.,f ti4,� ,r •_ ("' , 4" S} 5 i," ,. h CERTIFICATION: '' I1 , As �"'4- .s t., t.-, ,0%-+� .. ,f' ran ''T'Y,.ta,,. ,•1 .+. '. ,',.,4..^..t70'+'+j. ,''�?,,i't �). COLORADO ; ut a<" i 1111 x' ,,,,'9` '` Yx 0 v !'{,'1,..:41::' ,-r�.:r• +s, 9 r - .,.. a y I HEREBY CERTIFY THAT THESE PLANS FOR THE CONSTRUCTION THE DRMS PERMIT FOR THE INOUYE .r x�tr`i, �.W rt 'r+•u�� q� �r ��,A a yr ti t ; � � - a cT ti+ , rt��,.+ M��""�"�'.`a""'<,�.. ,,`;''' h r >. i, v 72 ; ,-*,r i.4�p _e GRAVEL MINE WERE PREPARED UNDER MY DIRECT SUPERVISION FOR THE OWNERS THEREOF EXCEPTING THEREFROM Ai 1'k " + , 4 }'I +r), "y X r',,,,.4, eTr fw„� y ) f l _ , %S`ut i��' ,i'4'+* 't„ .f t. —..,,,,t '�' -{4' ,Ii -++�., ,, t , f °�-,,F�{ e° " �[,�,Ii:., .'�s a,- }J �,T��"'� R2'tl 4' �i, L� {-�Y �a�J30li� 1 5v}�• ‘'',t,,,,„... .:„...1,... � I, 4 S..F�"'r ^I'+t."��"��'L a�Y^ � _u L.,:°.,�.� ,.p..'' Or. rTa"r#Tj °' 8i . L rA4� �aq '4,.........,,` 1) RECETHAT PTIONNOARCEL FLA4482OFTHND ERECORDSOFTHEWELDCD IN THAT QUITCLAIM RECORDEDKANDRECORDE AUGUST 3 1993 AS 1 Rc-,," �t •"ter•, �xjr , a, I . ��1 4;-47 j s x r xh,;- , ,.., : + I /�RECEPTI0N NO 02344462 OF THE RECORDS OF THE WELD COUNTY CLERK AND RECORDER t,;,� ra. r° r, t, .1 N +s- r } ygK,_T r"-'sue^s 4`< -,M"� "V1 ' ` 6/30/20 ,��'... � t, a��' � � . � ': fr t+l �` 3 ES� ^�`"- ,,. BY DATE INOUYE SITE ; ` �, '� �.. , 1r ,. t' T f { is r' s ANDREW R RODRIGUEZ P E 2) BLANKET TRAIL EASEMENT AGREEMENT REC NO 4233870 � r^ .t , ,P,0, f eP Si (7 ftf'g.."it:+ Via, I o-T ' , K 4 r + -120 ACRES � ,f 1�' w4'" ',^� �... *1 , ,: a.. 4 Yp C ..e, I'�F4- a'". ,'i +I �s�s t THE SAID DESCRIBED PERMIT BOUNDARY CONTAINS 120 ACRES,MORE OR LESS(t) �+ 1'a, .+, f ' w '7 .,-t 2sa x, `r'' �� e h 'c ^J 7 f' '' 7 L '1llt r d 'CFr W s, 1'''�.WCR145 __ ,,, .. Ta J ��'55��' - C , ' �'€ ..<,,.>ir — t'1 ,9a b''Itr" ..r 17771,.'i, -- - AMENDED WWTP PERMIT BOUNDARY ' "t dq' ;, Tt f r s ` i '4 �. +` ° 'r' �V^=� ,.,1y", k.+ I .r.?'+*$�FYr�",,b" '{Rk r, T�/ r !` +s �� hk 5r +,d �F' +• 4.`+t`'? x r'., -',414:1':: 3� t`..x '�- ` y i ' S'�'''f,,-,&-,t/ , �t ,,,,4� r� '3 e``.l; t .. -.44 C; ,,t, '`t t0,11• BESTWAY CONCRETE INC DOES HEREBY ACCEPT AND APPROVE THESE PLANS FOR THE DAMS PERMIT THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SECTION 31 TOWNSHIP 2 NORTH RANGE 66 ' M 1 Tre yk,`r Asa.1. ' t {' }i— r, `' a ""' r a � +1:, ^ fi 9'f' r'- ti t; 'tt‘` ' �S " . 'lr ,, r-W,t 'i^_ ..i..,^ `',- trt'e ..� f "— ^'T,�I.` ! ,.,w,.... a v WEST ` 44‘.74% .� 1-iti y1 .,'p t,k,.."� -F i',,. ..1 ',''' ),� y ',tr.., ,t 'aBy'i �.e. � K,- �',"� .s +.gii 0 4, - ,a s� >� J.- -;? 4.,' ',,,, �.n- x� 1 i' r' 9 ? Gtr . 4 t it t L t .,h - a "iDI :1•_a`• " tt, ,z , y f N f ---- --,_.t . if, NORTH PARCEL FTL162375E45W431266 „YJtF ,_"_ :- I � mi ,' sr Mix ":' ,.;, ,;,ka..,..,,.`..,.-,, � - ,.e-_,— f G� t s;. .--,.—,.st,-`1�"`;,+ • -..,. ...., .=. Vttu�u. < r'-, 1 ' lh t�'.c4.` BY DATE 6/30/20 THE NORTH PARCEL CONTAINS 40 ACRES 'Zit,r ,3 ,, q x x. 1: , +i7 .' ,s,,,, ! !� r y ��^' �p tg, 4 r> #,1 , ,� , _~, +a ,`aE it � � +�3 _ AUTHORIZED REPRESENTATIVE _ u "1t w•' .. ,,..V.,,IsirAi P ;+ �'.: ..„ C tf " .._,., r." �"x_ x I s 1 4- . � BURNCO COLORADO LLC SOUTH PARCEL FTL 15812-A PT E2NW4 6166 WESTSIDE ANN BEG SB9D5TE 145185 OF NW COR SEC '. 34EL :,;i a< y 4 ° r( ) r: . e ,y'fiYi ,.. + ,dr'�i1".n: : t.,.a� z •+ M _'.;+'�"s , '4i'S89D5TE 1334 9V S0D53 W 108 63'TO W LN HWY 85 BYPASS S15D03W 6198 S04D25'W 453'S05D59'W 3831 r N` '1'r A '' ti ,',,,',.t1� r�= 5';x i x. r t~y+ t, �," >a 4 A A' ''tk , ' fir ;k Y „,s_;r ,- 1 ,z 1 G.f_ ;.a. N89D2TE 49 V S0D27 E 309 S09D13'W 1287 T TO N LN HWY 52 S88D23'W 1045 4T TO PT 46 96'NO1D01'W OF SW ,,• S� ..1.,,..t.,0$ s p''� an.� „ 11 + t`,#4,� i S t" F y '. tie 1• 'i ii4AfYs dZ +' «w �_tg t t i?` f u f, CORE2NW4N01D01W52804'N88D58E16VN01D01'W264SBBD58'W165'N01D0TW181939TOBEG ,- X31, + R+.O.}i r• c F p ,... x 1Jr,7OAp, rft+ ir ,.�" =.'4t,, , a Apy ,i C fir' rvsk C,"n. .t,r THE SOUTH PARCEL PERMIT BOUNDARY EXCLUDES 53 06 ACRES ON THE SOUTH AND CONTAINS 1894 ° ` „'' i ` " rn 'r'it ti. In T 1 _ , '. 2 {,I; C,�. a • -' 3 '.rat t ,4 n t AMENDED WWTP `�, +k �, >as+F �,, �4' ACRES ,v e i.yr19,t y 6, 8. F a y V. ; r1_ ''.•�<S-i -r ti s SITE-58 9 ACRES t ea, • "::; "SnTHE AMENDED AREA CONTAINS 5894 ACRES k+ �� = t t '` � .. ' ,W'' g - �t�. thilatriat i66 �Q' oa=f F.rC Lu a txnll. € ri,,--4-,4--,:,` ., ' '" PREPARED FOR: THE FULL PERMIT AREA CONTAINS 178 9 ACRES(±) rid' f+ r+ } µ y �p : x 4f x h+4 as r'fz, 4,:f,- ��, s ₹ ,. � � `� 'I' ; =`' �,r ``,� � r , r BURNCO COLORADO, LLC i• ca ,� " C ke° ,- `�� 't rr...`� �, �'T tS t 1 -e - " }'� F es,: s t M;t� ;_* x � ? K «� 3c�,? ��. � fi nx 301 CENTENNIAL DR v. ,q 4 4 t<.5F t I d 7 In ,.,,5 4,, 1 'a'$' 'r3riT � i '" CA' ,{. °'" .z y S , ,,,,1�r d`, e Y ' r ;. . lratM"E MILLIKEN,CO 80543 <' k,i :vN* w` 44 w r r,,,,��yy c `',•R" qe '+ 1 ,1 970 587 7277 "� 4, t +�Y tz +t r "`K. # -r..VII, y'Tii ✓ f 'I g ...51-1-1 art,. '' 2 r, HWY p Alt �� 4 f }' c (. tip eat,,. ," Y41. r.,,„„"W'''K fw;t. = t,z �6:m� a '� e. if,....,— " aT,vi, ,w.„...,:itii .,,,,A,-,r, , , .„. „17,1, P : „. ;° P , x�, '` rKAI'.')r, 'Pr,, PREPARED BY: , CIVIL RESOURCES, LLC - NORTH 323 5th STREET - FIGURE 1 PO BOX680 - PROJECT LOCATION MAP FREDERICK,CO 80530 303 8331416 SCALE 1 =500 UNITS REVISIONS DATE NO DESCRIPTION DATE BY 10 1 30/2018 - DWG 81' COVEN-EASING CONDMONuw m UTSAND e "Z:,�/ - SHEET - CaBta4,a.....,. 1 LGETE IST/NC COUIV T Y ROAD 14 5 LCEVER/STWC 15 alp ffE/N LCEVF.R7STU'C LGEV£RIST/NC LOTH -4$� 56 x39 CMP r SGU77fPL17TE VA//FY \ e RICHARD (.G1�B •••b®4T9M 4897' LCEVER/STR1'C ,. ® , 4Ed/4S RE-4/4S fOS7iVR/GIL SOCIETY 72 x48 RCP Ff CENTURY UNK 36�p / -CENTURY UNK • .�-. ITm _ _ S894004 E 98815 __� N89 3109 E 151801>� �vWl � l : ��' ,' �, _ — — , 4,' — �:.—. —"�_�i1 c :1 �. ,CIVIL RES'DURCES, LLC '�t F0. IIr2, S,w..,�a�., `r-"�m� ®q•-- .n /I ,- ..,� -71k, LK N8921 09 E 653 74 w 1I ABANDONED' ..-// P BMW 2\ 8 �J 323 5th STREET,iiiD•T �' • CWCWD 1•' ti Imam' ( CO'CRETE i /I�/ / Y • PO Box 680 rm r,_ �'• �.o /I \ 'v FREDERICK CO 80530 r, ..,4,./ \ o WATERLINE UNITED POWER • )/1\ WATERLINE y'Cd� /7/ L J /r ' 303 833 1416 0�7 5. V \ 1 STORY BRICK J / \ / \\, \ E OF R _ / WWW W CIVILRESOURCES COM •• /+8�6'\\I \I T-OP /\ ' l�6BBU/ ❑ YLOODW Pv WEEP BASEMENT /��r7J/q) ( \y EOGAPPRO I / �\ / I - • I� / 100 y0. l�) ( Y/1/I �I DILAPIDATED BUILDING n\,', I (�\ \ Z•N WOOD GARAGE ',--� I \ \\ A�LLAA /IL FLOOD ZONE AE �l �� 86 FLOOD ZONE AE I1 ODyIPY/I L / WOOD SHED -•""I� \Y UN DPOWER ) ) � EASEMENT AGREfME I ❑ I / --/-;48 I\ +\ ' - EXIST BURIED i METAL GARAGE / / 4890 INOUYE 11 31A ) REC,NO 4233870 © \ / l 4890 IJ UNITED POWER/ \ / r x\ IRRI ATI•N Pf' a �� ! . - yyy��+.y • M+ ... • t\ 3 A- • •• y METAL WORKSHOPF j' ANADARKO) 1'1L •{1 W \ J \ INOUYE 9-36A 1 S( UN(NOWN) \ ///(7 �O_/ \ • a SOUTHPLATTE CI <_1 r ) - / .' N`4886 '� \ •1 BURNCO COLORADO,LLC \ (KERR MCGEE II \ / \ / _ I i �y VALLEY Ql \ \ = WOOD SHED q • '} - crj V _. .,_(' _ANADARKO) 7 ( - ( / /- I /i \ /� I / l J H/STOR/C1L •Q �� \ j5T / '7 /L � / s` �i �—') �\ 1 / Wl/^ IJ// � , )'/ �_ pm . / SOCIETY 301 CENTENNIAL DR O y ^ I \ /\ KERR MCGEE ANADARKO / \ t�(� r/ -.888-ill _. 1 o 'i A • (REC NO 02?68.f48) \ MILLIKEN CO 80543 67 GRASSHOPPER \ " \ ,I ' / 970 587 7277 1 \ (KERR MCGEE ANADARKO) /J / -1 / / I \ ) • ?V. CONTACT MARK JOHNSON V 'C < //) // '<9 ( LUGGED AND ABANDONED\/ \ i ) / STEEL BRIDGE DECK I 7RlCYClELANE / v/ I • CI`{ Cl I V I x p`%4/ N._ / \12 RCP // //J / / I F TEA-.ISLLC \I C . • / \ r / / \ 10 PVC) // /' �B / I94 • O O X4891 q • \, t ) 4 / \ (/ I�—/ / �1�11 y ^I 4891 // I \\/ —) \ 1T' • • •• UNITED POWER \ - r • / . ...a1.: y • �) / 1 x ❑ \ o COMPRESSOR r1 t ® 1 • , \ ' m 1) _ // < / ( )\\\\ FLOOD ZONE AE_ _ ( / ,I+• �• • • N ( �I�i` 1 /� �I�� /� II • \ \ f \ / (/ ��/\\�\\ \\\ \ \ �\ t ) 1.. SEPARATOR - ll D \ /1) J !` _ 1 I \ \ \ \\� y I P \ D�z � 0 • OW What below 1114 / r Il \/ J I / \— \\\�\9il�l �\ _0.°1/ \ 1NOUYE 15-31A /' `, TANK 11 CAIN.ore 'Udl.. ) \\ /N./ 867 \w\\\ \ W \ (KERR MCGEE i L: 0 ,_UNITED / I /1 ) \J \ \ / ( 12 DI- ETER S NORM ��/ ANADARKO)) SURVEY INFO / d6`yT ; 3 POWER l— I 1\ I / 1 I I \ 2 5 DIAMETER �5• ) TANK T'i �� ry /; \ y — \ COMPRESSOR L1 �++ 0 < 11 ) o m (iir. / \1 / \ \ \ 8 WNCKIE DONALD GU B NO2 r o �T I I ( \ 1 )\ / ()� \ \ 1 i 68 I ® (KERR CGEEANADARKO KING SURVEYORS \ LL 0 ( ( 1 \, / \ \ 650 E.Gazden Dnve Windsor Colorado 60550 —— / I ) )I I r `-—J/ I M V 3 1 I1 \ L \ \ \1\ 1N, ,/l / / M W-a • I m NP1T1 hones 70 GBfi 5011 I email mf I4n carve n corn Q O f°r ^\ 36 CMP �� " /"—'� \ \ . \ \I \—$ �Z_ / Tljr-�/ '�1 • "—\ \ —.. P ) I FS Yo1 —I IF —X X — )tc5892842 W 144170—X X==X Dr j— S: 2 2 W 133555�� :�' LEGEND __I c,/ KERR MCGEE GAS CAS GAS GAS • \ / /j' — • ,-1 y aF�a et_� ) F,-I 25 DIAMETER _ I ANADARKO12 STEEL PIPE ' 1 f"�_ _i r _\ FOUND ALIQUOT CORNER C SLl V cy m Na II J _ \ EASEMENT ® G h` (\V COMPRESSOR / KERR MCGEE __ 4— —� .--�-•� — AS DESCRIBED O z 2 R.Q z. --- \ \ • I / �\ I l KERR MCGEE ANADARKO ANADARKO 0( •I: ZQ t.-34' SEPARATOR /r I' SEPARATOR I►` I ~ -\ I \I ———— SECTION LINE { I—tJ VV [y[� 1,/ "-----,--',/ ,' ' I �•' AS T DESCRIBED ORNER W H. Q V \ ` r // �` / —— QUARTER SECTION LINE \ la— Q C 0 !� I / \ J 12 DIAMETER //�' FOUND MONUMENT 5 Ir METERHUT TANK I ,\ \ ----- RIGHT—OF—WAY II(�O IR 1 VYNCKIER DONALD-------"'ITT, %' .\ \\ �; COLORADO AS DESCRIBED �Q V °1 FUNAKO�B�_ 1 y ) 12 DIM1EfER GU B 901 TANK 1 / \ \ DCOLORAFJV!' PROPERTY LINE 1i J ' S GU NO2 ��\ 0 / 1 TANN / 1� I / A. O CALCULATED POSITION (D ERR MCGEE /\ II , I \ •A. OF V KP NAUFHTSAN • �• ,fK�M 10 DIAMETER I I \.. TRANSPORTATION ®•• PERMIT BOUNDARY SOILS TYPE • ?) /ANADARKO) ' / /../// I \ 10 I. (l ( \ ) TANK T' LCIEVER/ST /f II: 1 I \ \`\ (BOOK/405 200 BOUNDARY OFFSET LLLLLL Q 5 i1 . Q /\ I I \ / PAGE/44) \ EXISTING CONTOUR ,� `f REC NO 47602.47) /// \ (I INTERVAL) J'. / /'1 \\\ 4893 EXISTING FLOOD PLAIN 4887-� I t - _ v h- �I' CITYOFFE)RTLOPIiJN \ GAS �. / N , \ // ) • \J • .y././,/.N.J.,ELEVATION 100 YR FLOODWAY '" - ^' \ 4893 18 STEEL PIPE (REC NO/4SA?!T) I // r /I J 4 1 m ,,,, I • l) .- -_/ 11•I X11 I. •PVC I i / 1 R RECORDED —_—100 YR FLOOD PLAIN • IAIV=48877 \ I BOTTOM OF•DRAINAGE ... '/ I ^ /INOUYE4416 \ yllMi I/( CROWN=48935 I 1 1) I// SOLAR PANEL y�(� ,_- STRUC'REg48876 / P PLATTED m MONITORING WELL I 12 PVC —�'_' . J./E!R/ `\ (KP KAUFMAN WELL) I 1 CMP W 2 I y1 1. T�AL PIPE I w Iryy= {y N CROWN-4889 3 — ' - -1... M MEASURED 0 4% / w� 1 • 5 ,) '/.',U. __��- - 14.1. TH PLUS EXISTING GROUND SLOPE _ PROPERTY OWNER /�'` \ ` - ; PUMP �I:�_ METAL BUILDING \ )4 / / ° rte- �� / O 6 BORE LOCATION SOUTH • 6 PVC s s'� - - _.-_ I \T., MW 3 PLATIE/ I CROWN=4896 7 I I I I I ® MONITORING WELL REVISIONS 1 _ CROWN=4889 6 12 STEEL PIPE / VALLEY NO DESCRIPTION DATE • 8 STEEL PIPE / II / CROWN=4890 8 _ HlS7Y7R/CAL I \ // CRI VN=48967 /1111-STEEL PIPE SOC/ETY 1 4690 I:.- I' CROON=4694 4 II 1 I (REC NO \ /\ // / I I 0Z26&sos) , / \\ 04 r1 4 II 1 / ' �``�4 FLOODPLAIN INFO AFFECTED LANDS \/ \‘,/ /,-.''. I/ I' •I• \ /\`�) I I I �\ ��V / / FLOODPLAIN INFO IS FROM TRICYCLE LANE TEXAS LLC v N.\ \ I v 1 I II i /I FIRM FLOOD INSURANCE RATE MAP VARIOUS OUT BUILDINGS 1 c \ \ \ ) I II 12 PVC A' / �l // PANEL NO 08123C2102E FT LUPTON WASTE WATER r 0- _ `❑ I CROWN=40926 ',f1 TREAMNET PLANT \\ I ) y I END OBVE DATEBP`C \ LUPTON BOTTOM DITCH — \ \\ I� II / EFFECTIVE DATE JANUARY 20 2016EXISTING -8 \" / ' `I \\\ CR01YN 48929 IEXISTING VEGETATION TRICYCLE LANE TEXAS LLC IRRIGAyELL 1 "MW 5 / �� • ACCESS ROADS CI s _ _- - - ��l�i W AGRICULTURAL FARM LAND HE OHE L'' ''''• • _- --. _-- J,• - • :'MM:�.t.'- T.,—,:-. ...1:',.:27- 5— r to 0 ' 1TOTAL ACRES AREA N-894257 W 98731 • OH OHE ORE OHE OHE )�/ OF�r.,�\ / E`Q UNITED POWER OHE \� I ��T-1 I� I - - \ J 7 • APPLICANT \ III UNITED POWER )I % ITS OD-MIXED • PROPERTY ADDRESS 11IJ REFUSE'PILE I / BURNCO COLORADO LLC 12210 WCR 14� LGEVER/ST I ITS OF•=AVEL • /LIMITS OF a 301 CENTENNIAL DRIVE FT LUPTON CO 80621 (REC NO 4364243) I A D ASPHAL PILE( \ CONCRETE • BMILLIKEN CO 80543 _ //—r `ly�(1 ,BLOCK PILE / ❑ \ WHOP FACILLTIE5 I I C/TI'OFFORTLI/Pf70N 4I , (REC NO/459047) ry)// / I DESIGNED BY ABB DATE 1.7.0000 STRUCTURE INFO ,� , LIMITS OF . I / • NOTE DRAWN BY AM_ SCALE.AS NOTES 4 i,.. I -I \ ,I I: CHECKED BY ARR AS NOTED TRICYCLE LANE TEXAS LLC - , T, �rl r� , WO A • -� •ILE' • CIVIL RESOURCES LLC IS NOT RESPONSIBLE JOB NO 213 001 29 COOTFT LUPTON I/ \ /� \ 3; FOR SAFETY IN ON OR ABOUT THE DWG NAME:COVER Er5TING0NDRIONSI4NTG.11mt OWL VARIOUS BUILDINGS OWNED BY LAND OWNER SOILS MAP LEGEND I J/ -�/ CRMA ITSL OF / \ o PROJECT SITE NOR FOR COMPLIANCE BY THE APPROPRIATE PARTY OF ANY WCR 14 1/5 & ROW(WELD COUNTY PUBLIC WORKS) MAP UNIT SYMBOL MAP UNIT NAME I I / I., _ REGULATIONS THERETO OVERHEAD POWER LINE (NORTHERN &SOUTHERN BOUNDARY)(UNITED POWER) 1 ALNAN LOAM D TO 1 PERCENT SLOPES —WW1;W1� OVERHEAD POWER LINE (WESTERN BOUNDARY)(UNITED POWER) .F. ..®.m .®,.e .. ...:m.. - o. .. I R THESE MAPS WERE PREPARED BY CIVIL OVERHEAD POWER LINE (WCR 14 1/2) (UNITED POWER) 0 AQUOLLS AND AQUENTS GRAVELLY SUBSTRATUM - RESOURCES LLC IN COOPERATION WITH VARIOUS GAS LINES (KERR—MCGEE/ANADARKO & KP KAUFMAN) Jo eANKARD sANOY LOAM 0 TO a PERCENT SLOPES FREQUENTLY FLOODED COOT BESTWAY CONCRETE BESTWAY WILL KEEP EXISTING ❑ INOUYE 44-36 WELL HEAD (KP KAUFMAN) I THE DIVISION OF RECLAMATION MINING AND FUNAKOSHI SAM GU NO2 (KERR—MCGEE/ANADARKO) 32 KIM LOAM 1 TO 3 PERCENT SLOPES SAFETY INFORMED OF ANY CHANGES TO THE INOUYE 9-36A WELL HEAD (KERB—MCGEE/ANADARKO) 41 NUNN CLAY LOAN 0 TO 1 PERCENT SLOPES I MINING OR RECLAMATION PLANS THROUGH GRASSHOPPER WELL HEAD (KERR—MCGEE/ANADARKO) I ANNUAL REPORTS AND FILE TECHNICAL G8 USTIC TORRIORTHENTS MODERATELY STEEP I REVISIONS AND AMENDMENT APPLICATIONS INOUYE 11 DONALD WELL HEAD (KERR—MCGEE/ANADARKO) ❑ AS NECESSARY THROUGHOUT THE LIFE OF VYNCKIER GU B NO2 (KERR—MCGEE/ANADARKO) B5 WATER l''fir THE MINESHEET NOUYE 15-31A WELL HEAD (KERR—MCGEE/ANADARKO)FIBER OPTIC IN WCR 14 1/2 ROW (CENTURY UNK) i1 LUPTON BOTTOM DITCH L CWCWD (WATER LINE NORTH BOUNDARY) EXHIBIT C - PRE-MINING AND MINING PLAN MAPS OF AFFECTED LANDS Please refer to the attached Existing Conditions Map and Mining Plan Map. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit C-1 \ LGEVERIST/NC COUNTY ROAD 145 LGEVERI3TJNC \ \ " aC:.,''D LGEVER/STWC LGEVER/ST/NC LOTB I �°P�� RE-4145 SITE ACCESS SOUTORICATE VALLEY 4'R,Y� \ r LOTS LOTH I 55 LGEVER/STING HISTORICAL SOCIETY RE-4145 ) CIVIL RES`'URCES, LLC RE-414S FUTURE ROW �, / CENTURY LINK CENTURY LINK . —'..— ___ c.• I� ------.....-- —/-1/—/--/_____O _ O / 323 5th STREET �_Fp. �+ — _. ---_ �i_ -- �7G ®7�y . ._ `� zoo P O Box 680 .•` �- "... - .. -. .. _.a0 �,. . .'- •. -— o.®m--w— ..y�v -. .o r9w•2�,o 0 0.o / ` YR� FREDERICK,CO 80530 : - v / — 303 833 1416 cl 55 _ CWCWD cyrC5VD 30 �� ll '.��® ON_ WWW CIVILRESOURCES COM FUTURE ROW L ;3Fy/®/��/ 71� 21�yyATERLit/C UNITEPOWER_± WATERLI E ////� \®e \ �� ' , w. ` '.1.,1_,&,',y � 44 .. n I W Y SLURRY W•LL� / \, EDGE OF RIVER I SW'7 LLA 3 5 t. `1' up , OD P /� dII/ / / APPRO% 1 \ / ASPHALT PLANT AND ..r 0 / i vs CONCRETE PLANT 5 AC+/-y_r..w 7 Y t ,00,10-°°°1° 0 WOOD GARAGE r LL, '...;1 _ r _ __ /� , •j 42 UNITED POWER BLANKET TRAIL FLOOD ZONE AE +.. FLOOD ZONE AE .'` - WOOD SHED / : \�\. EASEMENT AGREEMENT " J. �' " METAL GARAGE 2 REC NO 4233870 \ / ] ` . `' / "' _;L "'At. N �' EXIST BURIED 4 30 INOUYE 11 31A / y S UNTTED,POWE,,R,L�y /\, �{'"�Ih C II' X IRRIGATION PIPE METAL WORKSHOP / �Q,C` MIN (KE0.R \ w \ BURNCO COLORADO,LLC •T 1't " I1:, �x $ I� Q (EXACT LOCATION '' NEW GARAGE- ANADARKO)RRMCGEE W'3 i� r.¢l'rfr �. INOUYE 9-36A U UNKNOWN) / 65W X60 L / SOU7HPLATTE r ti 301 CENTENNIAL DR V (KERB MCGEE -- PUMPER TRUIX Ir I / O �{ / VA/1FY \ , E C1 �-ANADARKO) I x PARKI90 - J u / 41 SWRRY WALL 180X90 k 1 H/57rJR/CAL MILLIKEN CO 80543 11 _ / 'j�o SOCIETY 970 587 7277 V I a))" 4'S� WELL TO BE KERB MCGEE ANADARKO I I o / / (REC NO 0276X5.8 V T f PLUGGED 8 / I1 ) \ r CONTACT MARK JOHNSON V[1 r "�a GRASSHOPPER FUEL AST Il�l I ABANDONED PHASES ` O j Y' MAINTAIN 30 RADIUS Fp I 3O (KERR MCGEE ANADARKO) DIESEL / / I V -ti Y < STEEL BRIDGE DECK 22 2 ACRES+/ n / () '✓; I �^ PLUGGED AND ABANDONED RCP MINE AT 3H IV I CI 22 r t RELOCATE ELECTRIC USE // PHASE R \ I // I / ,(� 20 5 ACRES+/ / I I (ti ,{ FROM THE SOUTH 10 PVC V I r,y t .R MINE AT 3H 1V n 48 '9`t a t` 'I� I m / LLO :99,Q■ UNITED POWER I i , O*` /// (1j�y 4 DIAMETER 1 I c / 7 ( • It8'—S • r q'p rA,11RELOCATE GAS LINES COMPRESSOR I MBBBfffEEER HUT .'1..k ?'.*.1 y r_.1 w (FUTURE) < I \ FLOOD ZONE AE / I Hi E1' RAN / I \ r > 30 J I �, ' PHASE 9A —/// \\ 42 II SEPARATOR\ OWINIlaN56elOW. 0 100 Ti 11. 'f MINE AT 3H 15 /// I \}�t\G� %I 1 Call before 'U(i' 0 \ 10 DIAMETER (m�) O y�h' 1 I \.P INOUYE 15 MCGEE - I TANK T'I (KERR I '' UNITED // ANADARKO) •4 12 DI ETER 0 < MAINTAIN_ r POWER 7/ < / \\\ 2 5CO DIAMETER // L \I> TANK / S Li DRCH a , vt COMPRESSOR /// VYNCKIE DONALD GU B NO2 SURVEY INFO Q O i { Iu J 1 a "... (KERR�1CGEE ANADARKO 1 J 1 I (1 { \\91\51,, { 30 L ./ Mwi / KING SURVEYORS W w O 36 OAP I 30 ®MW 3 'I- INSTALL 2 50 LONG \ .�• - 640 E('Orden Drtve I Windsor Colorado 805511 } Z U I — - -——— Y60 DIAMETER CULVERTS -i '_ / plume(970)686 SOU I email tnf @Ktn6Surve)on com 1--1 0.•_ X X X X X X —x }� — FOR FI/TURE CROSSINGS BETWEEN` 2"` `"> 7�T� ','E v KERR MCGEE L J CAS GAS 20 CAS GAS / /1'� �'�—`�_—_—�T){E WWTP SITE AND THE INOUYE�' - �' LEGEND O IF 2 5 DIAMETE: ANAD O 12 STEEL PIPE I `— —— — -GRAVEL MINE - —� Z J O G _ E COM•'- I/ I KERR MCGEE-- I VII ,�,e._ ..��.�-r•.......rv.w��=-___ ._- - ® F-i .� / KERR MCGEE ANADARKO ANADARKO Yip Lt( �- �\ \ / 1 EASEMENT FOUND DESCRIALIQUOBED CORNER W a O O Y \ ...SEPARATOR vI AS DESCRIBED . .` / SEPARATOR I, Ir/�II \A \ SECTION UNEQ V V[ r 4/ i�0 / I� J-1 I Rill I e \\ \ / / , AS T DESCRIBED CORNER cc _i '} ( J/ 12 DIAMETER �„ \.' O 3 ,4 �,,. I N TANK QUARTER SECTION UNE (F'( O V'6 04 1'"51 r, Gp5. I W / VYNCKIER DONALD 10 DIAMETER I I 01 �)�r\'1 COLORADO FOUND MONUMENT v _ FUNAK• .I (, l2 DIAMETER \I I \III ?.. \ RIGHT-OF-WAY _ GU B N01 TANK 1 ( DEPARTMEN/' AS DESCRIBED 1S ERR MCG2 \ �)� / ' 1,T,�ANK E II 1111 III' CONSTRUCT PLATFORM A.. OF / PROPERTY LINE KR KAUFFMAN 10 D]AMETER III FOR SWRRY WALL \ TRANSPORTATION O CALCULATED POSITION Ty,y 4A{NNA1DARK0 ``�� r I 90 I �\ ;y (, /1 I TANK // IICONSTRUCTABTLITY '•. / (BOOK ®a o® PERMIT BOUNDARY 7�T LGEVERIST Al 10 SOILS TYPE MAINTAIN 4�b �j 41 SEE TYP SECTION SHEET \ PAGE/44) CULVERT 'Y �' / REC NO 4360243) / I III I 21`';. — SLURRY WALL EXISTING CONTOUR -- ,L, I III C/TYOFFORTLUPION pg / \ AS V '/ FRESH WATER ,I II I (REC NO 14"9047) \� / R RECORDED 4887—CI INTERVAL) LAC+/ III T '7/iii `11 BOTTOM OF DRAINAGE P PLATTED 100 YR FLOODWAY / r 27 SOLAR PANEL I 1„ STRUCKRRg 48876 / ———100 YR FLOOD PLAIN 1INDDYE 44 36 / 11I WWTP 1 + 10 VERTICAL PIPE M MEASURED a y��'"� /(KP KAUFMAN WELL) W�-I•µ IyV21 PHASE 2 ASS- / __Jr. 29 4 ACRES+/ , WITH PLUG B 6 MONITORING WELL REWCATE ELECTRIC LINE `/ / / PUMPIII •I�' !W / BORE LOCATION 047 EXISNNC GROUND SLOPE REVISIONS MINE AT 3H IV FROM THE SOUTH - I , -4213 FEET OF MW3 ISWRRY WALL MONITORING WELL NO DESCRIPTION DATE ' I 6 SO117N PROPERTY OWNER • rA' /'. I _ PLA/TE y -- q ' �' Li/ // I � / VALLEY I7 'PHASE 1 f (� ,) HISTORICAL / SILT STORAGE /, MINE THROUGH CONSTRUCTED PLATFORM ONCE r / / / 15 4 ACRES+/ / I SLURRY WALL IS COMPLETE AND MINE 6 (REC NO y / / MINE AT O SH 1V (Ir ALL SLOPES AT 3H 1V 25 FROM SWRRY WALL 1/ / 447 OZZLGPS4Y) w / / ( II I TO MINE HIGHWALL V // / / jj � (1� / • CROSS SECTION CALL OUT 4 / /S / / �� / NOTE / / / r I t\ 30 !i G / / , II (N 30 CIVIL RESOURCES LLC IS NOT RESPONSIBLE FOR SAFETY IN EXISTING / / / / tl' _ :._"� 4� - ON OR ABOUT THE PROJECT SITE NOR FOR COMPLIANCE BY IRRIGATION MW 5 / / I. , — _—- --- /� THE APPROPRIATE PARTY OF ANY REGULATIONS THERETO WELL �^4` .-=._-...;.,-,-,..,.:.--- �� - _ -OHE OHE \ITV- aFlEA •--unc- /-vHc 3� uH OHE OHE OHE ONE ONE �""�•�'""�`` •- ` I �" 0 "' B E O OHE THESE MAPS WERE PREPARED BY CIVIL RESOURCES LLC IN \ r\J I I ❑ ' �1 ❑ ?1 I( -4� II C� COOPERATION WITH BESTWAY CONCRETE BESTWAY WILL KEEP UNITED POWER OHE II J ) THE DIVISION OF RECLAMATION MINING AND SAFETY INFORMED OF UNITED POWER 02 III 11fA1T5 OF`,A�I%Ed/ ANY CHANGES TO THE MINING OR RECLAMATION PLANS THROUGH III I / REElI5E PILE �. / ANNUAL REPORTS AND FILE TECHNICAL REVISIONS AND LGEVER/ST rO I / II ITS PH AVLEI I /UMITS OF AMENDMENT APPLICATIONS AS NECESSARY THROUGHOUT THE JUNE,ma A D ASTRAL PILE CONCRETE LIFE OF THE MINE (REC NO 426L421 I /-r.\ Vii BLOCK PILE DESIGNED BY al_ DATE 10 WWTP FACILITIES CITYOFFORTL UPTON / p DRAWN BY ABB_ SCALE AS NOTED \ (REC NO 1.159)17) / r---I-' VARIES FROM MINE PERMIT/PROPERTY UNE/ROW OR EASEMENT NO LESS THAN 20 I I II I / I I - C CHECKED BY AR AS NOTED FLOODPLAIN INFO AFFECTED LANDS \ Ill I I UMITS OF \ JOB NO 213 DIRT PILE I�ILIMI S OF TREE d 1 TEMPOPALREY TWSOIL AA� DWG NAMEi0Ya+1uS0NGOlYomW6ggm-WALOWG L-AND TRIMMINGS PILE FLOODPLAIN INFO IS FROM TRICYCLE LANE TEXAS LLC III I 1 I r FIRM FLOOD INSURANCE RATE MAP VARIOUS OUT BUILDINGS UMITS OF / \ E%ISONG GRADE 1 PANEL NO 08123C2102E FT LUPTON WASTE WATER Il ! / GRAVEL PILE GROUNDWATER SLURRY WALL f PHASE I I __AND 08123C2104E TREAMNET PLANT EFFECTIVE DATE JANUARY 20 2016 LUPTON BOTTOM DITCH / — WWTp w1 TABLE 0 MINE EXISTING VEGETATION TRICYCLE LANE TEXAS LLC 1,,,,. ...,•••••+••.m..�..®...>m..m..®..®.. I �PHASES 2-3 ACCESS ROADS AGRICULTURAL FARM LAND TOTAL PERMIT AREA. II COOT . , • 3 APPLICANT RI • 9 ACRES I POSIGVRINC TRENCH BOTTOM OF POSITIVE DRAINAGE TO SUMP (RAVEL REffAVE SHEET PROPERTY ADDRESS 30 COLORADO LLc Fzz1a COI II I TYPICAL - TOPSOIL STOCKPILE AT EDGE OF MINING AREAS CROSS SECTION 3 301 CENTENNIAL DRIVE FT LUPTON CE COLORADO C 80621 MILLIKEN CO 80543 i NOT TO SCALE EXHIBIT D-MINING PLAN This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.4 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (a) Description of the method(s)of mining to be employed in each stage of the operation as related to any surface disturbance on affected lands; The proposed permit area includes a significant deposit of sand and gravel located in the alluvium of the South Platte River in Weld County. The site is located south of Weld County Road 14.5 and is west of Highway 85. The amended area encompasses 58.9 acres and the original area is 120 acres totaling 178.9 acres. Site Preparation: Initial disturbance of the property will include: clearing the site of existing structures and utilities (with exception of the structures and utilities to remain), constructing the slurry wall, dewatering the site, and stripping organics, overburden, and fill. Mining: After the slurry wall installation, dewatering trenches will be excavated down to bedrock to dewater the portion of the site located within the slurry wall. Groundwater collected in the dewatering trench will be pumped into a settling pond and ultimately discharged to the South Platte River on the east end of the property. Once water levels are controlled through the dewatering system, scrapers will strip the organics and stockpile them separately for use during site reclamation. Any excess material not needed for reclamation may be sold or hauled off-site during the life of the mine. The sand and gravel material will be excavated down to bedrock. Each phase will be dry-mined using scrapers, bulldozers, front-end loaders, excavators, or similar equipment. The mining on this site will progress in one phase. The operator will develop and comply with a Stormwater Management Plan and Spill, Prevention, Control and Countermeasures Plan. The operator will notify the Division of Reclamation and Mine Safety and in the event of a reportable spill. Processing: All material mined under this proposed application will be transported by conveyor or haul truck to the processing area. The processing area will be located on the west side of the Inouye site. Import Material: Burnco Colorado, LLC may import material from and export material to other sites. The applicant is aware that in accordance with Rule 3.1.5(9)of the Construction Material Rules and Regulations, if any offsite material is used as backfill, a notarized letter will be submitted to the Division indicating the materials are inert. The applicant Inouye Gravel Mine-City of Fort Lupton,1/VVVTP-MLRB 112 Permit Amendment Exhibit D-1 will supply such a letter to the Division if, at the time of Reclamation, the applicant intends to use off-site material as backfill. (b) Earthmoving; Topsoil, organics, and overburden will be stripped with scrapers or bulldozers and stockpiled in segregated piles at the edge of the active mine phase. Excavators, front- end loaders, and bulldozers will be used to excavate the material. Conveyor belts or haul trucks will be utilized to transport the raw material from the active mine phase to the processing area. Phase 1 will be mined at a 0.5H:1V slope. Phases 2, 3, and 4a and 4b will be mined at 3H:1V. (c) All water diversions and impoundments;and The perimeter of the mined area will be dewatered by digging a trench to bedrock. The water will be pumped into a settling pond and discharged in accordance with a CDPS permit. Wash water for the processing area will be recycled through a series of small ponds within the processing area. The water required to operate the facility will likely be provided by the existing water rights associated with the property. No ditches wild be disturbed without prior authorization of the appropriate ditch company. (d) The size of area(s)to be worked at any one time. Excluding the processing area, the maximum area to be worked on at any one time is approximately 30 acres. (e) An approximate timetable to describe the mining operation. The timetable is for the purpose of establishing the relationship between mining and reclamation during the different phases of a mining operation. The Operator anticipates that mining will commence as soon as all permits are in place. The Operator anticipates extracting approximately 500,000 tons of aggregate per year, however, production rate may vary based on market demands. Timetable for Mining and Reclamation Phase 1: Mining will begin with the silt storage area in the first year. Stripping of the plant area and proposed concrete and asphalt plants will also occur. The stockpile area will be stripped during this time. The plant areas will take approximately a year to reclaim and will happen at the end of the mine. Phase 2: This phase will be at the Fort Lupton WWTP evaporation ponds and take approximately 4 years to mine and 2 years to reclaim. Phase 3: This phase will consist of the eastern cell and will take approximately 3 years to mine and 2 years to reclaim. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit D-2 Phase 4: This phase will consist of the western cell which will subdivided into cell 4a and 4b and will take approximately 7 years to mine and 2 years to reclaim. Reclamation will begin immediately after mining is complete. When possible, concurrent reclamation practices will be used to minimize site disturbance and to limit material handling to the greatest extent possible. Please refer to the Mining Plan Map in Exhibit C for phase areas to be mined, locations and areas. The table below summarizes the approximate quantities in the mining areas. Mining Phase Gravel Overburden Time (tons) (tons) (yrs) 1 1,200,000 148,000 2.4 2 2,000,000 80,000 4.0 3 1,700,000 242,000 3.4 4a 1,900,000 244,000 3.8 4b 1,600,000 197,000 3.2 Total 8,400,000 911,000 16.8 (0 Use Mining Plan Map in conjunction with narrative to present: (i.) Nature, depth and thickness of the deposit and thickness and type of overburden to be removed Exploratory borings drilled (December, 2017 and August, 2019) primarily along the perimeter of the site, encountered approximately two to twelve feet of overburden topsoil, silty sands, sandy lean clays, fill overlying approximately 22 top 47 feet of sand and gravel on top of primarily claystone bedrock. Refer to the Stability Analysis (Exhibit S) for locations of the property extents and boring locations. The bedrock depths in the proposed mine areas ranged from approximately 25 feet to 54 feet below the ground surface. (ii.) Nature of the stratum immediately beneath the material to be mined in sedimentary deposits The site is located approximately 20 miles east of the foothills of the Colorado Front Range on the western flank of the Denver Structural Basin. The basin is a downwarp of sedimentary strata that tends north-northwest, parallel to the mountain front. In the project area, the sedimentary bed dips gently eastward toward the axis of the basin east of the site. Based on regional geologic mapping (Colton, 1978), the near surface bedrock in the project area is the Paleocene and Upper Cretaceous Denver and Arapahoe Formations. The bedrock is overlain by upper Pleistocene and Holocene (Quarternary age) gravel deposits and eolian (wind blown)overburden soils. The gravel deposits exist primarily within the Piney Creek Alluvium deposit. The bedrock unit consists mainly of claystone and may contain lenses of siltstone and sandstone. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit D-3 (g) Identify the primary and secondary commodities to be mined/extracted and describe the intended use. The primary commodities are sand, gravel and fill; intended for construction materials. (h) Name and describe the intended use of all expected incidental products to be mined/extracted by the proposed operation. There are no expected incidental products to be mined. (I) Specify if explosives will be used in conjunction with the mining(or reclamation) No explosive material will be used on-site. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit D-4 EXHIBIT E - RECLAMATION PLAN This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.5 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: The proposed mining and reclamation plan focuses on minimizing the ecological impacts of mining, minimizing the length of time of impact, and maximizing long-term benefits. (a) A description of the type(s)of reclamation the Operator proposes to achieve in the reclamation of the affected land, why each was chosen, the amount of acreage accorded to each, and a general discussion of methods of reclamation as related to the mechanics of earthmoving; The mined areas will be reclaimed to a series of lined water storage reservoirs due to a need within the state for water storage facilities. Refer to Exhibit F for the acreages and additional details. Earthmovina The topsoil will be replaced by a scraper and generally graded with a blade. All grading will be done in a manner that controls erosion and siltation of the affected lands, to protect areas outside the affected land from slides and other damage. In addition, all backfilling and grading will be completed as soon as feasible after the mining process. All disturbed areas will be regraded and smoothed to a finished grade that is suitable for revegetation or the final land use. As noted previously, the area will be reclaimed as mining proceeds. Finish grading, topsoil placement and seeding will occur throughout the life of the mine. Once the resource is completely removed, final grading and vegetation of the slopes will be completed. The empty vessel will be available for water storage. A typical cross-section of the shoreline is included on the Reclamation Plan Map. (b) A comparison of the proposed post-mining land use to other land uses in the vicinity and to adopted state and local land use plans and programs. The water storage reservoirs will be compatible with the other land uses in the vicinity, which includes farmland, industrial land, and rural residential. (c) A description of how the Reclamation Plan will be implemented to meet each applicable requirement of Section 3.1. The Operator will carry reclamation to completion with reasonable diligence. Each phase of reclamation will be completed within one to two years from completion of mining, but not more than five years from the date the Operator informs the Board or Office that such phase has commenced. Section 3.1.5 Reclamation Measures Materia/Handling Grading will be performed to help control erosion and siltation of the affected lands through phased mining, implementing good operation techniques to handle material as little as possible, and vegetation of stockpiles remaining in place for more than one growing season. Although the use of erosion protection devices is not anticipated, if deemed necessary by the Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit E-1 operator at the time of excavation, silt fence and hay bale dams will be installed to prevent erosion. Backfilling and grading will be completed as soon as feasible after the mining process is complete for each phase. Maximum slopes and slope combinations will be compatible with the configuration of surrounding conditions and selected land use. Mining will occur at a slope that is stable. Reclaimed slopes in the water storage reservoir will not be steeper than a 3:1 ratio. The upland area will be reclaimed to grades consistent with pre-mining elevations. The operator will backfill using fill material generated on-site, or imported inert fill generated outside the permit area. If any inert off-site material is used as backfill, a notarized letter will be submitted to the Division as required by Section 3.1.5(9)of the MLRB Construction Material Rules and Regulations. It is not anticipated that mining will uncover any refuse or acid-forming or toxic producing materials, however if any such materials are encountered the operator will take precaution to handle the materials in a manner that will control unsightliness and protect the drainage system. Drill or auger holes that are part of the mining operation shall be plugged with non- combustible material,which shall prevent harmful or polluting drainage. Any test pits, soils boring holes, or monitoring wells not located within the mine excavation limits will be plugged as soon as it can be confirmed that they are no longer needed for the operation. Mined material to be disposed of within the affected area will be handled in such a manner so as to prevent any unauthorized release of pollutants to the surface drainage system. No unauthorized release of pollutants to groundwater shall occur from any materials mined, handled or disposed of within the permit area. Section 3.1.6 Water-General Requirements The Operator will comply with applicable Colorado water laws governing injury to existing water rights and with applicable state and federal water quality and dredge and fill laws and regulations. The operator will develop and comply with a stormwater management plan and will use best management practices(BMPs)to ensure groundwater and surface water are protected to the greatest possible extent. BMPs include schedules of activities, prohibitions of practices, maintenance procedures and other management practices to prevent or reduce the pollution in runoff from the site. Section 3.1.7 Groundwater-Specific Requirements The Operator will comply with the applicable standards and conditions for classified and unclassified groundwater. Section 3.1.8 Wildlife: The mining and reclamation plans have been designed to account for the safety and protection of wildlife on the mine site. The Operator will mine the site in phases and use concurrent reclamation methods to minimize the impact on wildlife. As described in the attached site assessment, Exhibit H of this application, the proposed reclamation plan may improve wildlife habitat. The proposed seed mix and plantings will Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit E-2 create improved cover, foraging, roosting, and nesting areas for wildlife. The water area within the reservoir will serve as habitat for waterfowl and other bird species and the fringes of the reservoir will be used by mammal, bird, reptile and amphibian species. Control and/or removal of noxious and weedy species during the project and the replacement of desirable graminoid,forb, shrub and tree species during reclamation will result in enhancement of wildlife habitat on the project site. Section 3.1.9 Topsoiling Topsoil shall be removed and segregated from other spoil. Topsoil stockpiles shall be stored in places and configurations to minimize erosion and located in areas where disturbance by ongoing mining operations will be minimized. Once stockpiled, topsoil shall be rehandled as little as possible. Stockpiles that will remain in place for more than one growing season will receive vegetative cover, as outlined on the Reclamation Plan Map, as soon as possible to minimize erosion. Section 3.1.10 Revegetation: In those areas where revegetation is part of the reclamation plan, the land shall be revegetated in a manner that establishes a diverse, effective, and long-lasting vegetative cover that is capable of self-regeneration without continued dependence on irrigation or fertilizer and is at least equal in extent of cover to the natural vegetation of the surrounding area. The proposed seed-mix and plantings for reclamation are outlined on the Reclamation Plan included in Exhibit F of this application. Section 3.1.11 Buildings and Structures Please refer to the enclosed Reclamation Plan included in Exhibit F. Section 3.1.12 Signs and Markers The Operator will post appropriate signage at the entrance to the mine site. The permit area will be marked by existing fencing, or proximity to existing County roads. (d) Plans for topsoil segregation,preservation and replacement;for stabilization, compaction and grading of spoil;and for revegetation. Topsoil will be removed and segregated from other spoil. Topsoil not needed for reclamation may be sold or removed from the site. For reclamation, topsoil will be replaced by a scraper and generally graded with a blade. Grading shall be done in a manner that controls erosion and siltation of the affected land and protects areas outside the affected land from slides and other damage. In addition, backfilling and grading shall be completed as soon as feasible after the mining process. Final grading will create a final topography that is appropriate for the final land use. For example, final grading of the reservoir above the high water line will replace material at a maximum 3:1 slope to meet the grade at the top of the banks. Topsoil will be uniformly placed and spread on areas disturbed by the mining, above the anticipated high water line. The minimum thickness shall be 6 inches above the surrounding finished grade, consistent with existing topsoil depths on-site. The topsoil shall be keyed to the underlying and surrounding material by the use of harrows, rollers or other equipment suitable for the purpose. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit E-3 In those areas where revegetation is part of the reclamation plan, the Operator will revegetate the land in such a manner so as to establish a diverse, effective, and long- lasting vegetative cover that is capable of self-regeneration without continued dependence on irrigation or fertilizer and is at least equal in extent of cover to the natural vegetation of the surrounding area. Seed will be drilled and mulched. The revegetation seeding and plant list on the Reclamation Plan Map contains the preferred species of grasses, shrubs and trees to be planted. Seeding will take place once final grading and replacement of topsoil have been completed for each phase. Timing of seeding will be consistent with standard horticultural practice for dryland applications-generally between late September and the middle of April to ensure there is adequate moisture for germination. (e) A plan or schedule indicating how and when reclamation will be implemented. Include: i. An estimate of the periods of time which will be required for the various stages or phases of reclamation. Please refer to the Timetable for Reclamation below; Phase 1: Mining will begin with the silt storage area in the first year. Stripping of the plant area and proposed concrete and asphalt plants will also occur. The stockpile area will be stripped during this time. This area will take approximately a year to reclaim and will happen at the end of the mine which coincides with year 14. Phase 2: This phase will consist of the WWTP cell and will take approximately 4 years to mine and 2 years to reclaim. Phase 3: This phase will consist of the eastern cell and will take approximately 3 years to mine and 2 years to reclaim. Phase 4: This phase will consist of the western cell which is subdivided into subcells 4a and 4b and will take approximately 7 years to mine and 3 years to reclaim. ii. A description of the size and location of each area to be reclaimed during each phase. Please refer to the Reclamation Plan Map (Exhibit F). iii. Outlining the sequence in which each stage or phase of reclamation will be carried out. Please refer to the Timetable for Reclamation below; Phase 1: Mining will begin with the silt storage area in the first year. Stripping of the plant area and proposed concrete and asphalt plants will also occur. The stockpile area will be stripped during this time. This area will take approximately a year to reclaim and will happen at the end of the mine. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit E-4 Phase 2: This phase will consist of the WWTP cell and will take about 4 years to mine and 2 years to reclaim. Phase 3: This phase will consist of the eastern cell and will take approximately 3 years to mine and 2 years to reclaim. Phase 4: This phase will consist of the western cell and its subcells 4a and 4b and will take approximately 7 years to mine and 2 years to reclaim. (I) A description of: i. Final grading-maximum anticipated slope gradient or expected ranges thereof; The finished slopes of the reservoirs will be 3 horizontal to 1 vertical. ii. Seeding-types,mixtures, quantities and time of application; Please refer to the Reclamation Plan Map for the list of plant materials and seeds to be utilized. The operator will seed during the appropriate season to ensure adequate moisture for germination and implement weed controls to allow the grasses to successfully establish. Additional plantings may be installed once the reservoirs are full of water and the grasses are established. iii. Fertilization-types, mixtures, quantities, and time of application; The type and application rate of fertilizer shall be determined based on a soil test at the time of final reclamation. iv. Revegetation-types of trees, shrubs, etc.;and Please refer to the Reclamation and Landscape Plan Maps for the types, quantities and location of trees and shrubs to be planted. v. Topsoiling-specify anticipated minimum depth or range of depths for those areas where topsoil will be replaced. Topsoil will be uniformly placed and spread on all areas disturbed by the mining above the anticipated high water line. The minimum thickness shall be 6 inches above the surrounding finished grade. WEED MANAGEMENT PLAN Burnco Colorado, LLC has a full-time weed manager on staff. This person is responsible for monitoring and controlling noxious weeds as they appear. Burnco Colorado, LLC typically prefers to control weeds mechanically, by mowing and/or discing. If necessary, weeds will be killed with a contact herbicide. Bestway Concrete has all of the necessary equipment in house to perform these tasks. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit E-5 EXHIBIT F- RECLAMATION PLAN MAP Please refer to the attached Reclamation Plan Map. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit F-1 COUNTY ROAD 145 Iffirirt, � 0 I 610. ¢a r 55W �� I �I FUTURE ROW J ZM..IiiCENTURY LINK CENTURY LINK • ` _ ___T___ _ __ — `�� '� :�� ti c — 9 �� CIVIL RES`s�URCES, LLC �ii�� a�L— ..... ,; W �.�^� 4 • lea a.`—rid/ 40mg0 _ 323 5th STREET 004, P 0 Box 680 TORE ROW ) . � 31_cni c..�` •wE `^ / T. ////' _ �� \,, FREDERICK,30833 1416 805 . _____. ._,_„._;,,,_14,___„. 30 ' - _�1 __ �-� � { q \ EDGAPPROXIVER WWW CIVILRESOURCES COM ,�i , ice �� ///� /��9) � i1�:13' ` SLURRY WALL vI� - �1AR � t C.CJ ' I Y42 �i 1 1./n! "• NZ w•..�i• GE •i'els'i"/" FLOOD ZONE AE LUPRY WALL { ll' pY ;•••SHE•_///// J "% • ��llAA y •.ZONE A: • J.-._Jiiii /// ♦- 1 . U/ " is'iEASEMENT AG ER EMNKET LENf / ti'• /METAL G GE1 v • III • --,ll 1, jJJVI I.IMMIIMPIII IIII ¢ 40 II G 0DI \ ` E DONALD GU B NO2-� - \ IN -� (KERR CGEE ANADARKOI�. il'i1S'/ \�P _aD / Mw� SURVEY INFO G • % .' '''.c 1 _ ao _ .. .. ®Mw 3 .► ; — JO -LrAM --^ = CULVERT CG O =— 3 O� r > 4 G511 E Gudcn Dnve 10.mdsnr Cnlniado 80550 UKERR MCGEE GAS AS CAS GASCOMPRESS KERR MCGEE ' I I(- .. ,.,,, SPILLWAY INVERT,I/ KERR MCGEE ANADARKO RELOCATE GAS LINE HERE ANADARKO /II i —emu EL 4892 \ LEGEND .' �PARATOR "' 40 FROM DITCH BANK vE.:��R I-•� <j r— / \ `s / z —I Q vl �. COORDINATE WITH.. Q. I d'y Au / �. 1 1 4 ,..' •. ANADARKO 12 DIAMETER it f, I I a TANK L \��` J \ _ FOUND ALIQUOT CORNER W a VIII 1 ,`, 100 EASEMENT ® AS DESCRIBED P o VYNCKIER DONALD Illy DIAMETER 11111 \\ SECTION UNE FUNAK 12 DIAMETER 11 \��\'` 3+151 SET ALI0007 CORNER GU B NOl TANK TIE UN.•WN ��\�''� m^ AS DESCRIBED •--� S GU NO2 TANK •/ IIII 1`' / sFuNR MCGEE � f �° b II'•i+{ II I'^ IN •:E. •CK \�� m QUARTER SECTION LINE /�TTT�L KR KAUFFMAN � /' m��10 DIAMETER ! � ` 'll 111 -•EE STILLING ��\ ; : : 0N WM 11, PE 'aI[�II P 4$93 ` III I ') • ` j SLURRY WALL EXISTING CONTOUR IIIIIIII(IIII 1i`11hh BOTTOM OF•DRAINAGE (I INTERVAL) fl I i� •LA ANEL I1 STRUCTUR 848876 / 4887 1 iliill1r -. ` "` R RECORDED rJPOFRWELL) W 2 '�� 1 ,mrPUMP 'III�I �I ECLAIMED �� IIyg// / • 15? • � B{{{'� / RESIONS• iI ®®- : - ¢ - IS 4 ACRES+/ • I If V• y INTO BP Ili EDROCK t1)14//,i4,1... �jIIMII L �I I `( s 1 D'S111 a BA IN(Tl'PG � , / `�1� ©x. _A CROSS SECTION CALL OUT kr.C II4V1f� + 1 NOTE MI Mil MIIMIIMIMI li CIVIL RESOURCES LLC IS NOT RESPONSIBLE ExiSTING o I (�'iEL � --.� Q FOR SAFETY IN ON OR ABOUT THE PROJECT IRRIGATION " ir/--. -MW 5 I ?S. -_ SITE NOR FOR COMPLIANCE BY THE WELL y I, '" . S'+.'�. .�'.ew�s i APPROPRIATE PARTY OF ANY REGULATIONS +HE , OHE , _ • - • .--'� • OHE OHE OHE OHE B4 ..elil •r. • -•-H ""'may •�Y7 \I•,.E THERETO UNITED POWER(THE ``{,._,� -, /�-------'71, II 5OOHE 0 THESE MAPS WERE PREPARED BY CIVIL \`J I I "L r� III '`I >� RESOURCES LLC IN COOPERATION WITH BURNCO UNITED POWE0. I 1,;//J_IL.II EEUSEIPILE \ IIIF� / I L ITSOF •AVEL)�/ m �IMITSOF (/' CDIVISION OF OLORADO LLC BESTWON MINING AND SAFETY WILL KEEP THE (l` / NFCOAµED OF ANY ON PLANSHT NROUGHGES O THE ANNUALNNG OR A D ASPHAL PILEI CONCRETE Ike I BLOCK PILE f WWTP FACILmF5 /�`( \ "� 1 REPORTS AND FILE TECHNICAL REVISIONS AND _/ AMENDMENT APPLICATIONS AS NECESSARY ( I •0 4- It I + THROUGHOUT THE LIFE OF THE MINE DESIGNED BY yL_ DATE zone me \ I y 5 I.ArilLIMITS.OF ^- i •1DRAWN BY ABB_ SCALE AS NOTED • 41 C I.1 0..--; ••• VARIES FROM MINE PQ2MIi/PROPERiY UNE/i{OW OR EASEMENT N(I IE55 THAN 20• W • �_-_ I CHECKED BY AS NOTED FLOODPLAIN INFO AFFECTED LANDS SEEDING SPEC FOR UPLAND AREAS I I I I / \ 300 JOB No 213 TEMPORARY TOPSOIL LIMITS OF / STOCKPILE SETBACK DWG NAME COVE EIOSMGCOADMONS-NOUTHR01019 COMMON NAME SCIENTIFIC NAME LBS F/ GRAVEL PILE` \ I R FLOODPLAIN INFO IS FROM TRICYCLE LANE TEXAS LLC III — l 100 FIRM FLOOD INSURANCE RATE MAP VARIOUS OUT BUILDINGS (VARIETY) PLS/ACRE I SETBACK EXISTING GRADE ' PANEL NO 08123C2102E FT LUPTON WASTE WATER Q WWTP Wl AND 08123C21O4E TREAMNET PLANT SANG BLUESTEM (CHAMP CHET) 1 w I GROUNDWATER SAND LOVEGRASS BEND NATIVE NE27 25 SLURRY WALL EFFECTIVE DATE JANUARY 20 2016 LUPTON BOTTOM DITCH ( ) -•- m®.m mxm m m m m m m®m a®m m®o.®m m®m m®m m - TABLE INDIAN RICEGRASS (NEZPAR RIMROCK) 3 RECLAI M TRICYCLE LANE TEXAS LLC PRAIRIE SANDREED I I EXISTING VEGETATION (cosHEN) D 7s I ACCESS ROADS GREEN NEEDLEGRASS (LODORM) 15 II 3 AGRICULTURAL FARM LAND TOTAL PERMIT AREA LITTLE BLUESTEM (BLAZE CIMARRON CAMPER) 075 • 789 ACRES APPLICANT YELLOW INDIANGRASS (CHEYENNE HOLT SCOUT) 05 1* DEWATERING TRENCH POSITIVE DRAINAGE TO SUMP BOTTOM OF SHEET PROPERTY ADDRESS SWITCHGRASS (BLACKWELL NEBRASKA 28) 1 5 I GRAVEL RESERVE BURNCO COLORADO LLC 12210 WCR 14} SAND DROPSEED 0 5 /d 301 CENTENNIAL DRIVE FT LUPTON Co 80621 — 4 TYPICAL - RECLAMATION CROSS SECTION MILLIKEN CO 80543 TOTAL LBS PER ACRE 120 NOT TO SCALE C--"-". CIVIL RESNDURCES, LLC 323 5th STREET P 0 Box 680 FREDERICK,CO 80530 492O 303 833 1416 ,— -- -I- - _ L - WWW CIVILRESOURCES COM _ STA 12+03 43 ----_ --- i ' —L. - II EL 4894 81 - _ , --- - _ 4910-TEMP ____L PLATFORM —25- 25�--22 .[—RIVER IS 159 I —4900- -- I I - - I r I- -- TO THE EAST- -— \\ 4890- 1___--- --I �STA_a+99.88 __ tf71 FENCEUEt ___ _ —487O- BURNCO COLORADO,LLC I 1 ELI 4895 06 58 i- - --I- -- 301 CENTENNIAL DR �3H 1V MINE/ SLURRY -- - 4860- MILLIKEN CO 80543 r___--_ _- I- --- - - 970 --BEDROCK- -I -t JI_ CONTAR MARK JOHNSON __I 7 777 7-7_7_7.7-7_7_7 7-7 1 7-7-7\717-7 7 77 7 7 7 7 7-7-7--7 7-7-7=/I_/-/ X 7 7 7-7-7-=—i —aeao- 4830— -- I 1 — 4020 o - o 6m m m m m m m m m m m m m �I ti w II I% wl ti �I nr uIt 2I ! , 2I 0+00 0+50 _ 1+00 1+50 2+00 2+5O 3+OO 3+5O 0 1 CROSS SECTION 0 < ! 6 p I Ce (N run - Q O G J x920 p i OU I TEMPORARY _ _I 0 —�- SLURRY WALL- -_ �9�a7%— i _ —� _II —---491O- z o 12 124 _ ssal-oroaa1 - WORE PLATFORM-_ .sr~r+JA96 __ __ r _ - fL I6919) �SI,17861/ 1 .1 -I— a-�eeev— —r__—_ _- DRAIN` STA P+-.9A r2_�eavea___4900— W 100 211@-_6:EXISTINGDE _�_ __I_-_--I _ 14 25- 26 i� R ..241 ro ' a EXIST GROUND - GRADE II 1 \\\ I� II 4890— Q .J '— 1 SLURRY— _su I,Z.7r�eJ r 4880— UI ce J —2 ` 3H 1V - WALL_ _FENCE X11 HARE ---- , 6 6 �_ MINE/RECLAIM SLOPE 33 - LINE __ _ PERMIT 1 na.=oE0ExA _ _ _ _ 1 42BOUNDARY — — 4870- 4 I� +_ 63r —--f— 1 Iesz�s +� _ BEDROCK I • �� -7-7-7:7_7-7 77 7-7 I I 7:1 7-7 7 7-71 7 7 7 7 7 7--7 7-7 7-X-7 7- -7-7147=7 77 77 717 7-7 7-.1-7-7_-_7-1-7_44#8_65:-: - �- � `6 TYPE II BEDDING 1 75 TYPE M BURIED RIP —__ __ __ _ — —E— RAP —4840— _ - OR APPROVED I EQUAL OVER 6 TYPE II 4030 TYPICAL SPILLWAY SECTION BEDDING REVISIONS it i1 i1 i it t it II II II III it II w w w w w w w w w w w w NO. DESCRIPTION DATE - 0+50 1+00 1+50 2+00 2+50 3+00 2 CROSS SECTION 2 5 C 0 5p (IX reef) 4920 — _ I _—T- - STA EC� _ PERMIT BOUNDARY— 4895T37 95137 _ �� OHE 563 TO THE SOUTH— 491O- --- -- -- y-STA-1+41 78 -- _ I I - 1 LEL.-489500 _ �- EXISTING J -_ --� ---- - _� 22 25- - 33 GRADE 4900- _- _ f_ i -�_ _ _ ! _ _ - 1 -�- 4890- __ _ I _ 17- \ SECTION - 4 L L �� I l 1_TEMP PLATFORM-__yILURRY_ LINE/PARCEL I I STA 0+0000 -_L _ _ �- TEMP I --4880-- EL 4854 07_ I I-- _ __ TI_36�-_ __j , � 3H 1V MINE/ - I _ _ RECLAIM SLOPE _49_i - -4870- 1_ _ 1- I DESIGNED BY S{L_ DATE JUNE,2010 - - - 4860- DRAWN BY 98� SCALE AS NOTED 777-77_ 7_7_7777_7777y7'777 Y77777777777777777 CHECKED BY GL AS NOTED-BEDROCK -"- _ I I I__-_H _I` 1-4850- lOB NO 213 001 29 _-__---- _ -__ _ I ' -484O— DWG NAME COVER D7511NGCQM1DIIIONSI00DYbAN010Y�U —_ _ — —� 1 I --- 1830 r ,j m m m m m m m m m m (7 UI w WI w1 „ 2 SECTION-1 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3 CROSS SECTION SHEET 2 5 L_2 1° - (II'PM) 5 I EXHIBIT G -WATER INFORMATION This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.7 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (a) Locate on the map(Exhibit C)tributary water courses, wells, springs,stock water ponds,reservoirs and ditches The South Platte River, Lupton Bottom Ditch and numerous monitoring wells on the site. Please refer to Exhibit C for locations of water courses in close proximity to the site, including wells, springs, stock water ponds, reservoirs and ditches. (b) Identify all known aquifers The Site is underlain by the South Platte alluvial aquifer. The Arapahoe and Laramie-Fox Hills Aquifer bedrock aquifers also underlie the site. (c) Show how water from dewatering operations or runoff from disturbed areas,piled material and operating surfaces will be managed to protect against pollution of either surface or groundwater both during and after the operation. Please refer to the Mining Plan Map in Exhibit C of this application. Mine areas will drain internally. Uncontrolled releases of surface water in disturbed areas will not occur. Stormwater collected in the active mine area will be managed through the dewatering system and approved CDPHE permit. (d) Estimate project water requirements including flow rates and annual volumes for the development, mining and reclamation phases of the project. Projected Use And Consumption: Annual evaporative depletions will be the evaporation from up to 5000 feet of 4-foot wide de-watering trench, located inside of the slurry wall. The total area of exposed water is 0.5 acres. The gross annual evaporation at the Fort Lupton Gravel Mine aggregate mine is 42 inches according to NOAA Technical Report NWS 33, Evaporation Atlas for the Contiguous 48 United States. Monthly evaporative losses are determined using percentages specified by the State Engineer's Office for locations below 6,300 feet. The nearest weather station is in Ft. Lupton/Brighton where the average annual precipitation is 12.99. Effective precipitation, that part of historical precipitation which was consumed by native vegetation on land to be covered by water surface, is conservatively estimated to be 70 percent of the total precipitation. The annual average effective precipitation at the property is estimated to be 9.09 inches. When subtracting the effective precipitation from the gross evaporation yields, the net annual evaporation is 32.13 inches, or 2.68 acre-feet per acre. The annual amount of evaporation from open water surfaces is 1.34 acre-feet. Mining Production&Operations: Burnco Colorado, LLC expects to extract a maximum of 500,000 tons annually of aggregate material from the site. The water retained in the 500,000 tons will be replaced pursuant to the Substitute Water Supply Plan (SWSP). The total Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit G-1 annual amount of water retained in the gravel product from mining activities totals 14.71 acre-feet. In addition, an estimated 1.93 acre-feet of water per year will be used for dust control based (approximately) on 3,500 gallons per day for 20 days per month for 9 months. Annually the total evaporative and operational losses from mining activities (open water surface evaporation, water retained in the aggregate product, dust suppression) totals 17.98 acre-feet of depletion which must be augmented. All depletions were lagged to the South Platte River using the lagging factors approved by the State Engineer pursuant to on-going Substitute Water Supply(SWSP) approvals. (e) Indicate the projected amounts of the water sources to supply project water requirements Replacement Water: The source of replacement water for depletions will be long term lease between Burnco Colorado, LLC and Central Colorado Water Conservancy District, City of Aurora, and/or the City of Fort Lupton. The State Engineer must approve a SWSP every year. These approvals require that the applicant provide a detailed explanation of the mining operations, a quantification of all mining activities and subsequent depletions and all legally available replacement sources. (0 Affirmatively state that the Applicant has acquired or applied for a National Pollutant Discharge Elimination System permit from the Water Quality Control Division The Operator will apply for a National Pollutant Discharge Elimination System (NPDES) permit from the Water Quality Control Division of the Colorado Department of Public Health and Environment prior to discharging water from the site. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit G-2 EXHIBIT H -WILDLIFE INFORMATION The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.8 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (1) The Operator/Applicant shall include in this Exhibit,a description of the game and non game resources on and in the vicinity of the application area,including; a) A description of the significant wildlife resources on the affected land; This information is provided in the attached Exhibit H Wildlife Information, prepared by Savage and Savage, located at 4610 Haystack Drive, Windsor, CO 80550 based on a site investigation conducted on March 1, 2020. b) Seasonal use of the area; This information is provided in the attached Exhibit H Wildlife Information, prepared by Savage and Savage, located at 4610 Haystack Drive, Windsor, CO 80550 based on a site investigation conducted on March 1, 2020. c) Threatened or endangered species; The attached Savage and Savage Exhibit H Wildlife Information included an evaluation for threatened and endangered species. Their conclusions are documented in the attached report. d) General effect during and after the proposed operation on the existing wildlife of the area; This information is provided in the attached Exhibit H Wildlife Information, prepared by Savage and Savage, located at 4610 Haystack Drive, Windsor, CO 80550 based on a site investigation conducted on March 1, 2020. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit H-1 6.4.8 Exhibit H - Wildlife Information Wildlife Assessment Site Description Savage and Savage conducted an on-site wildlife assessment for the Burnco Inouye WWTP project site on March 1, 2020. The WWTP project site is comprised of approximately 37 acres within the SE'/aSWI/4 of Section 31 within Township 2 North, Range 66 West of the 6th Prime Meridian, Weld County, Colorado. The center of the project site is located at 40.089254°latitude and-104.822784°longitude. The property is located west of Fort Lupton between Weld County Road 141/2 and Colorado State Highway 52. The property is accessed from Weld County Road 261/2. Weather during our site investigation was cool, and overcast with a temperature in the mid-30's (°F). The topography of the site is dominated by the primary alluvial terrace of the South Platte River. The elevation of the project area averages 4894 feet and slopes gently to the east toward the river. The soils that dominate the site are formed from alluvium and consist of loams and clays. The significant hydrologic feature adjacent to the site is the South Platte River. The Lupton Bottom Irrigation Canal flows from southwest to northeast to the west of the site. A riparian woodland community of plains cottonwoods (Populus deltoides) dominates the riparian corridor immediately adjacent to the South Platte River. This riparian corridor is dominated by mature cottonwoods with a mixed shrub understory and mesic to hydrophytic herbaceous component. The WWTP project site itself is comprised of former waste water treatment plant ponds which were constructed prior to 1974 (USDA, 1981). These areas are no longer active and have reverted to a mesic herbaceous plant community with no tree overstory and no shrub understory. Active and inactive agricultural areas dominate the remainder of the area adjacent to the project site Significant Wildlife Resources Tables 1, 2, and 3 list wildlife species that potentially occur on-site according to the Colorado Distribution Latilong Studies (CDOW, 1981, 1990, 1998). The latilong studies address mammals, birds,reptiles, and amphibians. A further review of wildlife species for which the Colorado Division of Parks and Wildlife has distribution maps on the Colorado Oil and Gas Conservation Commission web site (http://cogcc.state.co.us/infosys/Maps/wildlifemap.cfm) did not reveal any sensitive wildlife habitat or surface restricted occupancy areas within or adjacent to the project site (see appended map). Exhibit H Page 1 During our site investigation we observed several avian species within and adjacent to the project site. A great blue heron (Ardea herodias), red-tail hawk (Buteo jamaicensis), Canada geese (Branta canadensis), and two bald eagles (Haliaeetus leucocephalus)were all seen flying or soaring over the adjacent fields. No tracks, scat or nests were observed during our inspection. Seasonal Use With the exception of bats, the mammal species encountered during the site inspection or that potentially occur on-site are expected to be year-round residents or users of the site. The carnivore and ungulate species are not restricted to this site and tend to have relatively large home ranges (up to several square miles). The majority of rodent and insectivore species can be expected to reside on-site throughout the year, though many may hibernate during the cold months. Avian species may be year-round, temporary migrants, or summer residents of the site. Year-round residents would include the waterfowl, raptors, gallinaceous birds, pigeons, owls, and woodpeckers. The majority of the shorebirds and passerines would use the site during the spring, summer, and fall for feeding or resting during migration. Amphibian and reptile species of the site are year- round residents. Threatened and Endangered Species and Critical Habitat Potential habitat for the Preble's meadow jumping mouse (Zapus hudsonius preblei) and Ute ladies'-tresses orchid (Spiranthes diluvialis) were evaluated based on results of a search of potentially occurring threatened or endangered species on the U.S. Fish and Wildlife Service web site for Weld County, Colorado. Additionally, bald eagle (Haliaeetus leucocephalus) nest locations and winter night roost locales were evaluated from the Colorado Oil and Gas Conservation Commission (COGCC) web site map of sensitive wildlife habitat and restricted surface occupancy areas for protected wildlife species. Potential habitat exists for the Preble's meadow jumping mouse within the cottonwood riparian corridor immediately adjacent to the South Platte River. As the current proposed project plan does not include disturbance to potential Preble's meadow jumping mouse critical habitat, no further evaluation was undertaken. If future project activities include disturbance to potential habitat, the permittee will obtain clearance and/or approval from the U.S. Fish and Wildlife Service. Potential habitat for the Ute ladies'-tresses orchid is not present within the project site. The current proposed mine plan does not include disturbance to Ute ladies'-tresses orchid potential critical habitat,therefore, no further evaluation was undertaken. Exhibit H Page 2 No eagles or nests were observed during our investigation of the site. The map of significant wildlife habitat from COGCC did not identify any bald eagle nest sites or winter night roost areas within two miles of the project site. Project Effects to Wildlife The WWTP project site is proposed for mineral (sand and gravel) extraction activities. Noise and air emissions during mining will cause a temporary disturbance to wildlife. Species such as raccoons, coyotes, beaver, deer, and raptors will continue to use the riparian corridor during mining operations and the site itself when operations are not active. Bird species will use the periphery of the site and the site itself opportunistically, if prey or food species are present. The proposed project will extract material and leave water storage cells within the site. The mining and reclamation plan will create open water wildlife habitat that is currently not present. Areas of open water will sustain additional species of reptiles and amphibians as well as shorebirds and waterfowl. The addition of the water will create fringe environments favorable to predatory mammals and raptors, as well as food and water sources for herbivores. With revegetation of the borders around the water storage cells, additional strata and vegetation layers will be added to the site, creating improved cover, foraging,roosting, and nesting areas for wildlife. Exhibit H Page 3 Literature Cited Colorado Division of Wildlife. 1981 Ed. Colorado Reptile and Amphibian Distribution Latilong Study. Colorado Division of Wildlife and The Denver Museum of Natural History. 1990 Ed. Colorado Mammal Distribution Latilong Study. Colorado Division of Wildlife in cooperation with the Colorado Field Ornithologists. 1998 Ed. Colorado Bird Distribution Latilong Study. Colorado Oil and Gas Conservation Commission. 2020. Web Map. (https://cogccmap.state.co.us/cogcc_gis_online/) U.S. Department of Agriculture, Soil Conservation Service. 1981. Soil Survey if Weld County, Colorado: Southern Part. Exhibit H Page 4 Burnco Inouye COGCC Wildlife Map 02 19 2020 ' P4. m 1 1 4 n, 1,1 dU r+ ,;, l 54 tK t t` n,h,t �• ' + 3� t !( rk‘ t 'r,, A PI;I— jl1 e'r 7 —� t�tp a/ t AT-7 ft, P ,'Y X �y }XS 1 i i �F__ ' r y. + ,#. 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Mammal Species Potentially Inhabiting the WWTP Project Site Classification/Common Name Scientific Name Preferred Habitat Marsupials Virginia Opossum Didelphis virginiana RpL,Ag,Cr Carnivores Coyote Canis latrans All types Swift Fox Vulpes velox SgP,Ag Red Fox Vullies Ag Raccoon Procyon lotor RpL,Ag Long-tailed Weasel Mustela nigripes All types except Ri Mink Mustela vison RpL Badger Taxidea taxus SgP Striped Skunk Mephitis All types except Ri Ungulates Mule Deer Odocoileus hemionus RpL,Ag White-tailed Deer Odocoileus virginianus RpL,Cr,Ag Antelope Andlocapra americana SgP Lagomorphs Desert Cottontail Sylvilagus audubonii SgP,RpL Eastern Cottontail Sylvilagus floridanus RpL Black-tailed Jack Rabbit Lepus californicus SgP White-tailed Jackrabbit Lepus townsendii SgP Rodents Wyoming Ground Squirrel Spermophilus elegans Ag Spotted Ground Squirrel Spermophilus spilosoma SgP Thirteen-lined Ground Squirrel Spermophilus tridecemlineatus SgP Black-tailed Prairie Dog Cynomys ludovicianus SgP,Ag Fox Squirrel Sci&rus niger RpL Northern Pocket Gopher Thomomys talpoides SgP,Ag Plains Pocket Gopher Geomys bursarius Ag Olive-backed Pocket Mouse Perognathus fasciatus SgP Plains Pocket Mouse Perognathus flavescens SgP Silky Pocket Mouse Perognathus flavus SgP Hispid Pocket Mouse Chaetodipus hispidus SgP,RpL Ord's Kangaroo Rat Dipodomys ordii SgP,RpL Beaver Castor canadensis Ri,RpL Western Harvest Mouse Reithrodontomys megalotis SgP,RpL,Ag Plains Harvest Mouse Reithrodontomys montanus SgP Exhibit H Page 6 Classification/Common Name Scientific Name Preferred Habitat Rodents Deer Mouse Peromyscus maniculatus All types Northern Grasshopper Mouse Onychomys leucogaster SgP,Cr Prairie Vole Macrotus ochrogaster SgP,RpL,Ag Meadow Vole Microtus pennsylvanicus RpL Muskrat Ondatra zibethicus Ri Norway Rat Rattus norvegicus RpL,Cr House Mouse Mas musculus RpL,Cr Porcupine Erethizon dorsatum SgP,Ag,RpL Insectivores Least Shrew Cryptotis parva RpL,roadsides Bats Western Small-footed Myotis Myotis ciliolabrum SgP Red Bat Lasiurus borealis RpL Hoary Bat Lasurius cinereus RpL Silver-haired Bat Lasionycteris noctivagans RpL Big Brown Bat Eptesicus fuscus RpL Habitat Types SgP Shortgrass-Prairie RpL Riparian Lowland W/OG Wet open ground Ri Open Water-Streams and Rivers Ag Agriculture Cr Croplands Exhibit H Page 7 Table 2. Breeding Bird Species Potentially Inhabiting the WWTP Site Classification/Common Name Scientific Name Preferred Habitat Pelicans and Allies Double-crested Cormorant Phalacrocorax auritus Ri,RpL Herons Great Blue Heron Ardea herodias RpL Great Egret Casmerodius albus RpL Snowy Egret Egretta thula RpL Cattle Egret Bubulcus ibis RpL Black-crowned Night-Heron Nycticoras nycticorax RpL Waterfowl Canada Goose Branta canadensis RpL Wood Duck Aix sponsa Ri,RpL Mallard Anas platyrhynchos Cr Cinnamon Teal Anas cyanoptera W/OG Hooded Merganser Lophodytes cucullatus RpL Common Merganser Mergus merganser RpL Vultures and Raptors Turkey Vulture Cathartes aura RpL Osprey Paadion haliaetus Ri Bald Eagle Haliaeetus leucocephalus Ri Northern Harrier Circus cyaneus Cr Cooper's Hawk Accipiter cooperii RpL Swainson's Hawk Buteo swainsoni Ag,RpL Red-tailed Hawk Buojamaicensis Ag Ferruginous Hawk Buteo regalis Ag Golden Eagle Aquila chrysaetos Ag American Kestrel Fako sparverius Ag,RpL Gallinaeous Birds Ring-necked Pheasent Phasianus colchinus Ag,RpL,Cr Wild Turkey Meleagris gallopavo Ag Northern Bobwhite Colinus virginianus Ag,RpL Shorebirds Killdeer Charadrius vociferous Cr,Ag Mountain Plover Charadrius montanus SgP Upland Sandpiper Bartramia longicauda SgP Long-billed Curlew Numenius americanus SgP,Cr Common Snipe GaNinago W/OG Wilson's Phalarope Phalaropus tricolor W/OG,Cr Pigeons and Doves Rock Dove Columba livia Ag Mourning Dove Zenvida macroura Ag,Cr,RpL Exhibit H Page 8 Classification/Common Name Scientific Name Preferred Habitat Cuckoos Yellow-billed Cuckoo Caccyzus americanus RpL Owls Common Barn-Owl Tyto alba Ag,RpL Eastern Screech-Owl Otus asio RpL,Ag Great Horned Owl Bubo virginianus Ag Burrowing Owl Athene cunicularia rodent burrows Long-eared Owl Asio otus RpL Short-eared Owl Asioflammeus Ag Hummingbirds Black-chinned Hummingbird Archilochus alexandri RpL Kingfishers Belted Kingfisher Coyle alcyon RpL,Ri Woodpeckers Lewis'Woodpecker Melanerpes lewis RpL,Ag Red-headed Woodpecker Melanerpes erythrocephalus Ag,RpL Passerines Western Wood-Pewee Contopus sordidulus RpL Say's Phoebe Sayornis saya Ag Cassin's Kingbird Tyrannus vociferans Ag,RpL Western Kingbird Tyrannus verticalis Ag,RpL Eastern Kingbird Tyrannus Ag,RpL Tree Swallow Tachycineta bicolor RpL Northern Rough-winged Swallow Stelgidopteryx serripennis Ag Bank Swallow Riparia Ag Cliff Swallow Hirundo pyrrhonota Ag Barn Swallow Hirundo rustica Ag Blue Jay Cyanocitta cristate RpL,Ag Black-billed Magpie Pica Ag American Crow Corvus brachyrynchos Ag,RpL Chihuahuan Raven Corvus cryptoleucus SgP Black-capped Chickadee Parts altricapillus RpL,Ag Eastern Bluebird Sialia sialis RpL American Robin Turdus migratorius Ag Gray Catbird Dumetella carolinensis RpL Northern Mockingbird Mimus polyglottos Ag,RpL Brown Thrasher Toxostoma rufum RpL,Ag Cedar Waxwing Bombycilla cedorum Ag Loggerhead Shrike Larzius ludovicianus RpL,SgP European Starling Sturnus vulgaris Ag,RpL Red-eyed Vireo Vireo olivaceus RpL Yellow Warbler Dendroica petechia RpL,Ag Blue Grosbeak Guiraca caerulea RpL Lazuli Bunting Passerina amoena RpL Indigo Bunting Passerina cyanea RpL Cassin's Sparrow Aimophila cassinii SgP Exhibit H Page 9 Classification/Common Name Scientific Name Preferred Habitat Lark Sparrow Chnndestes grammacus RpL McCrown's Longspur Cadcarius mccownii SgP Chestnut-collared Longspur Cadcarius ornatus SgP Bobolink Ddichonyx oryzivorus Cr,hayfields Red-Winged Blackbird Agelaius phoeniceus Ag Passerines Western Meadowlark Stw-nella neglecta Cr Brewer's Blackbird Euphagus cyanocephalus Ag Common Grackle Quiscalus quiscula Ag Brown-headed Cowbird Molothrus ater Ag Orchard Oriole Icterus spurius RpL,Ag Northern Oriole Icterus galbula RpL,Ag American Goldfinch Carduelis tristis Ag House Sparrow Passer domesticus Ag Habitat Types SgP Shortgrass-Prairie RpL Riparian Lowland W/OG Wet open ground Ri Open Water-Streams and Rivers Ag Agriculture Cr Croplands Exhibit H Page 10 Table 3.Reptile and Amphibian Species Potentially Inhabiting the WWTP Site Classification/Common Name Scientific Name Preferred Habitat Amphibians Salamanders Tiger Salamander Ambystoma tigrinum all types Toads and Frogs Great Plains Toad Bufo Cognatus SgP,RpL,Ag Woodhouse's Toad Bufo woodhousei SgP,RpL,Ag Blanchard's Cricket Frog Acris crepitans blanchardi RpL Boreal Chorus Frog Pseudacris triseriata maculata RpL,Ag Bull Frog Rana catesbiana RpL Northern Leopard Frog Rana pipiens RpL Plains Spadefoot Scaphiopus bombifrons SgP Turtles Common Snapping Turtle Chelydra serpentina RpL,OW-St/Ri Western Painted Turtle Chrysemys picta belli RpL,OW-St/Ri Ornate Box Turtle Terrapene ornata SgP,RpL Western Spiny Softshell Trionys spiniferus hartwegi RpL,OW-St/Ri Reptiles Lizards Northern Earless Lizard Holbrookia maculata SgP,Ag Short-horned Lizard Phrynosoma douglassi SgP Red-lipped Prairie Lizard Sceloporus undulatus erythrocheilus SgP,RpL Northern Prairie Lizard Sceloporus undulatus garmani SgP Prairie-lined Racerunner Cnemidophorus sexlineatus viridis SgP,RpL Skinks Northern Many-lined Skink Eumeces multivirgatus SgP,Ag Snakes Eastern Yellowbelly Racer Coluber constrictor flaviventris SgP,RpL,Ag Plains Hognose Snake Heterodon nasicus SgP,RpL,Ag Milk Snake Lampropeltis triangulum SgP,RpL,Ag Northern Water Snake Neroctia sipedon RpL,OW-St/Ri Bullsnake Pituophis melanoleucus sayi SgP,RpL,Ag Wandering Garter Snake Thamiophis elegans vagrans RpL Western Plains Garter Snake Thammophis radix haydeni RpL,SgP Red-sided Garter Snake Thamxophis sirtalis parietalis RpL Prairie Rattlesnake Crotalus viridis SgP Habitat Types SgP Shortgrass-Prairie RpL Riparian Lowland W/OG Wet open ground OW-St/Ri Open Water-Streams and Rivers Ag Agriculture Cr Croplands Exhibit H Page 11 EXHIBIT I -SOILS INFORMATION The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.9 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (1) In consultation with the Soil Conservation Service or other qualified person,indicate on a map(in Exhibit C)or by a statement the general type, thickness and distribution of soil over affected land. The soil types on the site are shown on the attached Soil Map and the attached exhibits, including a description of the soil type on site. 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Ilk Yr'k`t'`i'i t,P,ie ' il: 1;4 ' ,t i �7"..5t -t#.�'''4 e i 7' S t t�iN : 1 ,+ u�r- F .� ,,z�,�. „� Lt 'R t� 5e, s al k-' F' `:t �M 'W SZ'` 9 „ %'"-t S,V'' E ,. r t t _f.'v� } e. , aYi sCF N`.47 f w r,,,', t i�ie. :,ffe.11 , Y 4,i- A Z0•Tyyz r � 4 ,.'y a�i t 1 ''�9 t } c,{`ti1 j.. f vt i.., t' ." T} wt ,s . F+ r �". y W „pi•, r. � ,.3.M '„' 'dt � �sn„, ,,.. .4,..,s..,,..,....„ 3 t l .,-,,-,%.t ik � • 424. i" r . i •1. June 8, 2020 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/)and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://ofices.sc.egov.usda.gov/locator/app?agency=nres)or your NRCS State Soil Scientist(http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at(202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 8 Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 1—Altvan loam, 0 to 1 percent slopes 13 3—Aquolls and Aquents, gravelly substratum 14 10—Ellicott-Ellicott sandy-skeletal complex, 0 to 3 percent slopes, rarely flooded 16 21—Dacono clay loam, 0 to 1 percent slopes 18 68—Ustic Torriorthents, moderately steep 19 85—Water 20 Soil Information for All Uses 21 Soil Reports 21 Soil Physical Properties 21 Physical Soil Properties 21 References 27 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles.A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 Custom Soil Resource Report scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, sat, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the compments. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and 6 Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. 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N.+e,{ >t. `. 4r^s`< tC� '�� .3?7 c' a -rk, a -, s , ^rfj7''.du r.1 �,°�• r `�, , v .�.'a {7'�, ` t"�f'J,'t'k ! yS + '`"' t` � "�! (�^±'+Y,t 'r4��;kT'r•�y'� � yl 17 .;iiY'f' Y•n "Y klr.'!e ^ i li7S 4 , :r A4 i 1 yr51`jyt r l •r' 0 r+t ; • S■rl G` n��nCrbe d:Irdt�tl 3IQt�+� F ,, �� , 1.44,1);' a, e Jy� a i r.,t ,.}ry r, \ , Jay. LC}if • 40°427 N s7•,X` ° .I"`f" 7 ', j".f r� �. �c, T 3.wT�e:�� [7dt � 40°429 N 5144: 514600 514900 5150: 515370 515400 515600 515800 3 3 En in Map Scale 1 10,500 rf pnnled on A portlart(8.5'x 11")sheet Meters N 0 150 300 600 900 S Feet 0 500 1000 2000 30pp Map projection Web Mercator Corner:ordinates WGS84 Edge tics UTM Zone 13N WGS84 9 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(AOI) 14 Spoil Area The soil surveys that comprise your AOI were mapped at } Area of Interest(AO!) Stony Spot 1:24,000. Soils Very Stony Spot Li Soil Map Unit Polygons Warning:Soil Map may not be valid at this scale. Vt Wet Spot •••,. Soil Map Unit Lines Other Enlargement of maps beyond the scale of mapping can cause • Soil Map Unit Points `�' misunderstanding of the detail of mapping and accuracy of soil .- Special Line Features line placement.The maps do not show the small areas of Special Point Features contrasting soils that could have been shown at a more detailed w Blowout Water Features scale. Streams and Canals .:, Borrow Pit Transportation Please rely on the bar scale on each map sheet for X Clay Spot map .may Rails measurements. 0 Closed Depression out Interstate Highways Gravel Pit Source of Map: Natural Resources Conservation Service US Routes Web Soil Survey URL: ¢, Gravelly Spot Major Roads Coordinate System: Web Mercator(EPSG:3857) o Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator A, Lava Flow Background projection,which preserves direction and shape but distorts distance and area.A projection that preserves area,such as the 44, Marsh or swamp . Aerial Photography Albers equal-area conic projection,should be used if more ARtMine or Quarry accurate calculations of distance or area are required. Miscellaneous Water This product is generated from the USDA-NRCS certified data as O Perennial water of the version date(s)listed below. Rock Outcrop Soil Survey Area: Weld County,Colorado,Southern Part + Saline Spot Survey Area Data: Version 18,Sep 13,2019 Sandy Spot Soil map units are labeled(as space allows)for map scales ,, Severely Eroded Spot 1:50,000 or larger. Sinkhole Date(s)aerial images were photographed: Jul 19,2018-Aug D Slide or Slip 10,2018 of Sodic Spot The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps.As a result,some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report Map Unit Legend r u� - ' £ e�.v.. Er .�,�tw C � s„5 `�' ". x r;4x St¢ u�», • r # 9W k' S r �'. s; prigMel Me 'r d 'n n '^ fl it :, �,� `�` r. ""s r"" .:' riFtruk 1 Altvan loam,0 to 1 percent 97.1 17.5% slopes 3 Aquolls and Aquents,gravelly 170.5 30.8% substratum 10 Ellicott-Ellicott sandy-skeletal 201.1 36.3% complex,0 to 3 percent slopes,rarely flooded 21 Dacono clay loam,0 to 1 0.6 0.1% percent slopes 68 Ustic Torriorthents,moderately 5.9 1.1% steep 85 Water 78.5 14.2% Totals for Area of Interest 553.6 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properies similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions,especially where the pattern was so complex that it 11 Custom Soil Resource Report was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 12 Custom Soil Resource Report Weld County, Colorado, Southern Part 1—Altvan loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361j Elevation: 4,500 to 4,900 feet Mean annual precipitation: 14 to 16 inches Mean annual air temperature: 46 to 48 degrees F Frost-free period: 130 to 150 days Farmland classification: Not prime farmland Map Unit Composition Altvan and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Altvan Setting Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Parent material: Old alluvium Typical profile H1 -0 to 10 inches: loam H2- 10 to 25 inches: clay loam H3-25 to 60 inches: gravelly sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.20 b 2.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Available water storage in profile: Low(about 5.7 inches) Interpretive groups Land capability classification (irrigated): 3s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy Plains (R067BY002CO) Hydric soil rating: No Minor Components Cascajo Percent of map unit: 9 percent Hydric soil rating: No 13 Custom Soil Resource Report Aquic haplustolls Percent of map unit: 1 percent Landform: Swales Hydric soil rating: Yes 3—Aquolls and Aquents, gravelly substratum Map Unit Setting National map unit symbol: 3627 Elevation: 4,000 to 7,200 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 45 to 55 degrees F Frost-free period- 80 to 155 days Farmland classification: Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar soils: 55 percent Aquents, gravellysubstratum, and similar soils: 30 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Aquolls Setting Landform: Swales, streams, flood plains Down-slope shape: Linear Across-slope sbape: Linear Parent material: Recent alluvium Typical profile H1 -0 to 48 inches: loam H2-48 to 60 irihes: gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 6 to 48 inches Frequency of flooding: Frequent Frequency of ponding: None Salinity, maximum in profile: Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available waterstorage in profile: Moderate(about 8.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6w 14 Custom Soil Resource Report Hydrologic Soil Group: D Ecological site: Salt Meadow(R067BY035CO) Hydric soil rating: Yes Description of Aquents, Gravelly Substratum Setting Landform: Stream terraces Down-slope shape: Linear Across-slope shape: Linear Parent materiar: Recent alluvium Typical profile H1 -0 to 48 inches: variable H2-48 to 60 inches: very gravelly sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water(Ksat): Moderately high to very high (0.57 to 19.98 in/hr) Depth to watertable: About 6 to 24 inches Frequency of flooding: Frequent Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Nonsaline to moderately saline (0.0 to 8.0 mmhos/cm) Available water storage in profile: Moderate (about 6.6 inches) Interpretive groups Land capabilityclassification (irrigated): 6w Land capability classification (nonirrigated): 6w Hydrologic Soil Group: D Ecological site: Salt Meadow(R067BY035CO) Hydric soil rating: Yes Minor Components Bankard Percent of map unit 10 percent Hydric soil rating: No Ustic torrifluvents Percent of map unit: 5 percent Hydric soil rating: No 15 Custom Soil Resource Report 10—Ellicott-Ellicott sandy-skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol: 2xsth Elevation: 3,950 to 5,960 feet Mean annual precipitation: 13 to 17 inches Mean annual air temperature: 50 to 54 degrees F Frost-free period: 135 to 165 days Farmland classification: Prime farmland if irrigated and the product of I (soil erodibility)x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils: 65 percent Ellicott sandy-skeletal, rarely flooded, and similar soils: 25 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ellicott, Rarely Flooded Setting Landform: Flood plains on intermittent streams, drainageways Down-slope shape: Linear Across-slope shape: Concave Parent material. Noncalcareous, stratified sandy alluvium Typical profile A -0 to 4 inches: sand AC-4 to 13 inches: sand C1 - 13 to 30 inches: sand C2-30 to 44 inches: sand C3-44 to 80 inches: coarse sand Properties and qualties Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water(Ksat): High to very high (13.00 to 39..96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cm) Available water storage in profile: Very low(about 2.1 inches) 16 Custom Soil Resource Report Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: Sandy Bottomland (R067BY031 CO) Hydric soil rating: No Description of Ellicott Sandy-skeletal, Rarely Flooded Setting Landform: Channels on intermittent streams, channels on drainageways Down-slope shape: Linear Across-slope shape: Concave, linear Parent material: Noncalcareous, stratified sandy alluvium Typical profile A -0 to 4 inches: very gravelly coarse sand AC-4 to 13 inches: very gravelly sand Cl - 13 to 30 inches: very gravelly sand C2-30 to 44 inches: very gravelly sand C3-44 to 80 inches: very gravelly coarse sand Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water(Ksat): High to very high (13.00 to 39.96 in/hr) Depth to water table: More than 80 inches Frequency of flooding: Rare Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.1 to 2.0 mmhos/cmj Available water storage in profile: Very low(about 1.2 inches) Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 8s Hydrologic Soil Group: A Ecological site: Sandy Bottomland (R067BY031CO) Hydric soil rating: No Minor Components Haverson Percent of map unit: 10 percent Landform: Terraces Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Ecological site: Overflow(R067BY036CO) Hydric soil rating: No 17 Custom Soil Resource Report 21—Dacono clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 361y Elevation: 4,550 to 4,970 feet Mean annual precipitation: 14 to 18 inches Mean annual air temperature: 48 to 52 degrees F Frost-free period: 140 to 160 days Farmland classification: Prime farmland if irrigated Map Unit Composition' Dacono and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Dacons Setting Landform: Terraces Down-slope shape: Linear Across-slope shape: Linear Parent material Mixed alluvium Typical profile H1 -0 to 12 inches: clay loam H2- 12 to 21 inches: clay loam H3-21 to 27 inches: clay loam H4-27 to 60 inches: very gravelly sand Properties and qualties Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): Moderately high (0.20 to 0.60 in/hr) Depth to water fable: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Moderate (about 6.3 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 3s Hydrologic Soil Group: C Ecological site: Clayey Plains (R067BY042CO) 18 Custom Soil Resource Report Hydric soil rating: No Minor Components Heldt Percent of map unit: 5 percent Hydric soil rating: No Nunn Percent of map unit: 5 percent Hydric soil rating: No Altvan Percent of map unit: 5 percent Hydric soil rating: No 68—Ustic Torriorthents, moderately steep Map Unit Setting National map unit symbol: 3631 Elevation: 4,450 to 5,100 feet Mean annual precipitation: 10 to 16 inches Mean annual air temperature: 46 to 54 degrees F Frost-free period: 120 to 160 days Farmland classification: Not prime farmland Map Unit Composition Ustic torriorthents and similar soils: 85 percent Minor componenfs: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Ustic Torriorthents Setting Landform: Escarpments, breaks Down-slope shape: Linear Across-slope shape: Linear Parent materiat Gravelly alluvium Typical profile H1 -0 to 10 inches: gravelly sand H2- 10 to 60 inches: gravelly sand Properties and qualities Slope: 9 to 15 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Low Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95 to 19.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None 19 Custom Soil Resource Report Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very low(about 1.8 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Hydric soil rating: No Minor Components Columbo Percent of map unit: 10 percent Hydric soil rating: No Eckley Percent of map unit: 3 percent Hydric soil rating: No Otero Percent of map unit: 2 percent Hydric soil rating: No 85—Water Map Unit Composition Water. 95 percent Minor component& 5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Minor Components Aquolls Percent of map unit: 5 percent Landform: Marshes Hydric soil rating: Yes 20 Soil Information for All Uses Soil Reports The Soil Reports section includes various formatted tabular and narrative reports (tables)containing data for each selected soil map unit and each component of each unit. No aggregation of data has occurred as is done in reports in the Soil Properties and Qualities and Suitabilities and Limitations sections. The reports contain soil interpretive information as well as basic soil properties and qualities. A description of each report(table) is included. Soil Physical Properties This folder contains a collection of tabular reports that present soil physical properties. The reports(tables) include all selected map units and components for each map unit. Soil physical properties are measured or inferred from direct observations in the field or laboratory. Examples of soil physical properties include percent clay, organic matter, saturated hydraulic conductivity, available water capacity, and bulk density. Physical Soil Properties This table shows estimates of some physical characteristics and features that affect soil behavior. These estimates are given for the layers of each soil in the survey area. The estimates are based on field observations and on test data for these and similar soils. Depth to the upper and lower boundaries of each layer is indicated. Particle size is the effective diameter of a soil particle as measured by sedimentation, sieving, or micrometric methods. Particle sizes are expressed as classes with specific effective diameter class limits. The broad classes are sand, silt, and clay, ranging from the larger to the smaller. Sand as a soil separate consists of mineral soil particles that are 0.05 millimeter to 2 millimeters in diameter. In this table, the estimated sand content of each soil layer is given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. Silt as a soil separate consists of mineral soil particles that are 0.002 to 0.05 millimeter in diameter. In this table, the estimated silt content of each soil layer is 21 Custom Soil Resource Report given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. Clay as a soil separate consists of mineral soil particles that are less than 0.002 millimeter in diameter. In this table, the estimated clay content of each soil layer is given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. The content of sand, silt, and clay affects the physical behavior of a soil. Particle size is important for engineering and agronomic interpretations, for determination of soil hydrologic qualities, and for soil classification. The amount and kind of clay affect the fertility and physical condition of the soil and the ability of the soil to adsorb cations and to retain moisture. They influence shrink- swell potential, saturated hydraulic conductivity (Ksat), plasticity, the ease of soil dispersion, and other soil properties. The amount and kind of clay in a soil also affect tillage and earthmoving operations. Moist bulk density is the weight of soil (ovendry) per unit volume.Volume is measured when the soil is at field moisture capacity, that is, the moisture content at 1/3-or 1/10-bar(33kPa or 10kPa) moisture tension. Weight is determined after the soil is dried at 105 degrees C. In the table, the estimated moist bulk density of each soil horizon is expressed in grams per cubic centimeter of soil material that is less than 2 millimeters in diameter. Bulk density data are used to compute linear extensibility, shrink-swell potential, available water capacity, total pore space, and other soil properties. The moist bulk density of a soil indicates the pore space available for water and roots. Depending on soil texture, a bulk density of more than 1.4 can restrict water storage and root penetration. Moist bulk density is influenced by texture, kind of clay, content of organic matter, and soil structure. Saturated hydraulic conductivity(Ksat) refers to the ease with which pores in a saturated soil transmit water. The estimates in the table are expressed in terms of micrometers per second. They are based on soil characteristics observed in the field, particularly structure, porosity, and texture. Saturated hydraulic conductivity (Ksat) is considered in the design of soil drainage systems and septic tank absorption fields. Available water capacity refers to the quantity of water that the soil is capable of storing for use by plants. The capacity for water storage is given in inches of water per inch of soil for each soil layer. The capacity varies, depending on soil properties that affect retention of water. The most important properties are the content of organic matter, soil texture, bulk density, and soil structure. Available water capacity is an important factor in the choice of plants or crops to be grown and in the design and management of irrigation systems.Available water capacity is not an estimate of the quantity of water actually available to plants at any given time. Linear extensibility refers to the change in length of an unconfined clod as moisture content is decreased from a moist to a dry state. It is an expression of the volume change between the water content of the clod at 1/3-or 1/10-bar tension (33kPa or 10kPa tension) and oven dryness. The volume change is reported in the table as percent change for the whole soil. The amount and type of clay minerals in the soil influence volume change. Linear extensibility is used to determine the shrink-swell potential of soils. The shrink-swell potential is low if the soil has a linear extensibility of less than 3 percent; moderate if 3 to 6 percent; high if 6 to 9 percent; and very high if more than 9 percent. If the linear extensibility is more than 3, shrinking and swelling can cause 22 Custom Soil Resource Report damage to buildings, roads, and other structures and to plant roots. Special design commonly is needed. Organic matter is the plant and animal residue in the soil at various stages of decomposition. In this table, the estimated content of organic matter is expressed as a percentage, by weight,of the soil material that is less than 2 millimeters in diameter. The content of organic matter in a soil can be maintained by returning crop residue to the soil. Organic matter has a positive effect on available water capacity, water infiltration, soil organism activity, and tilth. It is a source of nitrogen and other nutrients for crops and soil organisms. Erosion factors are shown in the table as the K factor(Kw and Kf) and the T factor. Erosion factor K indicates the susceptibility of a soil to sheet and rill erosion by water. Factor K is one of six factors used in the Universal Soil Loss Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE)to predict the average annual rate of soil loss by sheet and rill erosion in tons per acre per year. The estimates are based primarily on percentage of silt, sand, and organic matter and on soil structure and Ksat. Values of K range from 0.02 to 0.69. Other factors being equal, the higher the value, the more susceptible the soil is to sheet and rill erosion by water. Erosion factor Kw indicates the erodibility of the whole soil. The estimates are modified by the presence of rock fragments. Erosion factor Kf indicates the erodibility of the fine-earth fraction, or the material less than 2 millimeters in size. Erosion factor T is an estimate of the maximum average annual rate of soil erosion by wind and/or water that can occur without affecting crop productivity over a sustained period. The rate is in tons per acre per year. Wind erodibility groups are made up of soils that have similar properties affecting their susceptibility to wind erosion in cultivated areas. The soils assigned to group 1 are the most susceptible to wind erosion, and those assigned to group 8 are the least susceptible. The groups are described in the"National Soil Survey Handbook." Wind erodibility index is a nurnerical value indicating the susceptibility of soil to wind erosion, or the tons per acre per year that can be expected to be lost to wind erosion. There is a close correlation between wind erosion and the texture of the surface layer, the size and durability of surface clods, rock fragments, organic matter, and a calcareous reaction. Soil moisture and frozen soil layers also influence wind erosion. Reference: United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. (http://soils.usda.gov) 23 Custom Soil Resource Report Three values are provided to identify the expected Low (L), Representative Value (R), and High (H). Physical Soil Properties—Weld County,Colorado,Southern Y p t}/, Part Map symbol Depth Sand Silt Clay Moist Saturated Available Linear Organic Erosion Wind Wind and soil name bulk hydraulic water extensibility matter factors erodibility erodibility density conductivity capacity group index Kw Kf T In Pct Pct Pct g/cc micro m/sec In/In Pct Pct 1—Altvan loam, 0 to 1 percent slopes Altvan 0-10 -42- -38- 15-20-25 1.25-1.33- 4.00-23.00-42.0 0.14-0.16-0.1 0.D-1.5-2.9 1.0-1.5- .28 .28 3 6 48 1.40 0 7 2.0 10-25 -35- -38- 20-28-35 1.25-1.33- 1.41-8.00-14.11 0.14-0.18-0.2 0.0-1.5-2.9 0.5-0.8- .32 .32 1.40 1 1.0 25-60 -96- -2- 0-3-5 1.45-1.53- 141.00-141.00- 0.02-0.04-0.0 0.0-1.5-2.9 0.0-0.3- .02 .05 1.60 141.00 6 0.5 3—Aquolls and Aquents, gravelly substratum Aquolls 0-48 -39- -35- 20-26-35 1.20-1.28- 1.41-8.00-14.11 0.14-0.16-0.1 0.0-1.5-2.9 1.0-2.0- .24 .24 4 8 0 1.35 7 3.0 48-60 -97- -2- 1-2-3 1.55-1.62- 141.00-141.00- 0.02-0.03-0.0 0.0-1.5-2.9 0.0-0.5- .02 .10 1.68 141.00 4 1.0 Aquents, 0-48 - -.,- . 4-17.30 1.20-1.35- 4,00-73,00-141. 0.07-0.12-0.1`. 0.0-1.5-2,9 0.5-0.8- .20 .20 3 8 gravelly 1.50 00 6 1:0 substratum 48-60 -98- -2- 0-3-6 1.60.1.65 141.00-141,00- 0.04-0,07-0.0 0.0-1..,5-2.9 0,0-0,5-- ,05 .17 1.70 {. 141,00 9 10 24 Custom Soil Resource Report Physical Soil Properties—Weld County,Colorado,Southern Part Map symbol Depth Sand Silt Clay Moist Saturated Available Linear Organic Erosion Wind Wind and soil name bulk hydraulic water extensibility matter factors erodibility erodibility I density conductivity capacity group index Kw Kf T In Pct Pct Pct g/cc micro m/sec In/In Pct Pct 10—Ellicott- Ellicott sandy- skeletal complex, 0 to 3 percent slopes, rarely flooded Ellicott, rarely 0-4 90-95-95 1-3-9 1-2-4 1.60-1.64- 141.14-211.50-2 '0.04-0.04-0.0 0.0-0.0-0.2 0.1-0.5- .02 .02 5 1 220 flooded 1.68 82.00 5 1.0 4-13 85-95-95 1-3-14 1-2-4 1.60-1.66- 91.74-211.50-28 0.03-0.04-0.1 0.0-0.0-0.2 0.0-0.3- .02 .02 1.72 2.00 1 0.8 13-30 85-95-95 1-4-14 1-1-4 1.60-1.63- 91.74-211.50-28 0.02-0.04-0.1 0.0-0.0-0.2 0.0-0.3- .02 .02 1.66 2.00 1 0.8 30-44 85-95-95 1-4-14 1-1-4 1.60-1.63- 91.74-211.50-28 0.02-0.04-0.1 0.0-0.0-0.2 0.0-0.3- .02 .02 1.66 2.00 1 0.5 44-80 85-95-95 1-4-14 1-2-4 1.62-1.68- 91.74-211.50-28 0.02-0.02-0.1 0.0-0.0-0.2 0.0-0.3- .02 .02 1.73 2.00 1 0.5 Ellicott sandy- 0-4 90-95-95 1-3-9 1-2-4 1.60-1.60-1141.14-211.50-2 0.02-0.02-0.0 0.0-0.0-0.1 0.1-0.5- .02 .02 5 2 134 skeletal, 1.60 82.00 3 1.0 rarely flooded 4-13 85-95-95 1-3-14 1-2-4 1.60-1:66- 91.74-211.50-28 0.01-0.02-0.0 0.0 0.0-0.1 0.0-0.3- .02 .02 1.72 2.00 6 0.8 13-30 85-95-95 1-4-14 1-1-4 1.60-1.63- 91,74-21150-28 0.01.0.02-0.0 0.0-0.0-0,1 0,0-0,3- .02 .02 1.66 2,00 6 0.8 30-44 85-95-95 1-4-14 1-1-4 1.60-1.63- 91.74-211.50-28 0.01-0.02-0.0 0.0-0.0-0.1 0.0-0.3- .02 .02 1.66 2.00 6 0.5 44-80 85=95-95 1.4-14 1-2-4 1.62-1.68- 91.74-211.50-28 0.01-0.02-0.0 0.0-0.0-0,1 0.0-0.3- .02 .02` 1.73 2.00 6 0.5 25 Custom Soil Resource Report Physical Soil Properties—Weld County,Colorado,Southern Part Map symbol I Depth Sand Silt Clay i Moist Saturated Available Linear ! Organic Erosion Wind Wind and soil name E bulk hydraulic water extensibility matter factors erotlibility credibility density conductivity capacity group index Kw Kf T In Pct Pct Pct g/cc micro m/sec In/In Pct Pct 21—Dacono r clay loam,0 to 1 percent slopes Dacono 0-12 -34- -32- 27-34-40 1.20-1.25- 1.41-3.00-4.23 0.19-0.20-0.2 3.0-4.5-5.9 2.0-3.0- .24 .24 3 6 48 1.30 1 4.0 12-21 -25- -36- 35-39-60 1.25-1.30- 1.41-3.00-4.23 0.15-0.18-0.2 6.0-7.5-8.9 1.0-1.5- .28 .28 1.35 1 2.0 21-27 -36- -37- 15-27-35 1.25-1.30- 4.23-9.00-14.11 0.13-0.16-0.1 3.0-4.5-5.9 1.0-1.5- .32 .32 1.35 8 2.0 27-60 -96- -2- 0-3-5 1.50-1.55- 141.00-141.00- 0.03-0.04-0.0 0.0-1.5-2.9 0.5-0.8- .02 .05 1.60 141.00 5 1.0 68—Ustic Torriorthents, moderately steep Ustic 0-10 -97- -2- 0-2-4 1.55-1.63- 42.00-92.00-14 0.02-0.03-0.0 0.0-1.5-2.9 0.5-0.8- .10 .17 5 1 180 torriorthents 1.70 1.00 4 1.0 10-60 -97- -2- 0-2-4 1.55-1.63- 141.00-141.00- 0.02-0.03-0.0 0.0-1.5-2.9 0.0-0.3- .05 .17 1.70 141.00 4 0.5 85—Water Water — — — — — — — — — 26 References American Association of State Highway and Transportation Officials(AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials(ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1!995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nres/detail/national/soils/?cid=n res142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577 Soil Survey Staff. 2010. Keysto soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nres.usda.gov/wps/portal/n res/detail/national/soils/?cid=nres 142 p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/ home/?cid=nrcs142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 27 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/ nres/deta i I/so i is/scie nti sts/?cid=n res 142 p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid=nrcs142p2_053624 142 p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf 28 EXHIBIT J -VEGETATION INFORMATION The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.10 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: (a) Description of present vegetation types including estimates of cover and height of principal species in each fife-form represented; This information is provided in the attached Exhibit H Wildlife Information, prepared by Savage and Savage, 4610 Haystack Drive, Windsor, CO 80550. (b) Relationship of present vegetation to soil types; This information is provided in the attached Exhibit H Wildlife Information, prepared by Savage and Savage, 4610 Haystack Drive, Windsor, CO 80550. (c) Estimates of annual production and carrying capacity if the choice for reclamation is for range or agriculture. Non-applicable. The proposed reclamation is for a water storage reservoir. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit J-1 EXHIBIT K-CLIMATE INFORMATION The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.11 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: Provide a description of the significant climatological factors for the locality. This property is in a semi-arid continental climate strongly influenced by the Rocky Mountains. The area is usually warm in the summer with frequent hot days. In winter, periods of very cold weather are caused by arctic air moving in from the north or northwest. Milder periods occur when westerly winds are warmed as they move down slope off of the mountains to the east. Weather monitoring data is not available from the site. The nearest weather monitoring station is at Ft. Lupton and Brighton, Colorado. Data is collected from the Western Regional Climate Center. The table below lists the mean monthly temperature, and average total precipitation on a monthly and annual basis for the period of record from January 1, 1950 to December 31, 2000. Most of the precipitation occurs as rainfall during the warmer part of the year with the heaviest rainfalls in the late spring and early summer. Winter snowfall is frequent but the snow cover usually melts quickly during the milder periods. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Mean Monthly 28.0 32.9 39.1 48.1 57.7 67.3 72.8 70.7 61.9 50.8 37.1 29.5 49.7 Temperature(F) Average Total 0.44 0.39 1.04 1.44 2.12 1.63 1.44 1.39 1.16 0.83 0.69 0.42 12.99 Precipitation (in.) Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit K-1 EXHIaT L- RECLAMATION COSTS The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.12 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: Please refer to the attached table for estimates of quantities and associated costs. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit L-1 Attachment for Exhibit L Inouye-Gravel Mine-Reclamation Cost Estimate Activity Quantity Units Unit Costs Cost A. Phase 1(Inouye) 1 Final grade and place 6"of topsoil on the entire disturbed area 15,324 CY $ 1.13 $ 17,319.06 2 Seed and mulch 19.00 Acres $ 1,736.69 $ 32,997.19 3 Scarify ground 19.00 Acres $ 150.00 $ 2,850.00 4 Backfill Silt Storage above Water Surface Elevation(9'to groundwater) 199,100 CY $ 1.05 $ 209,055.00 3 i u taI 4 A 62;22;124', B. Phase 2(WWTP) 1 Final grade and place 6"of topsoil on the entire disturbed area 3,992 CY $ 1.05 $4,191.78 2 Seed and mulch 4.95 Acres $ 977.00 $4,836.15 3 Scarify ground 4.95 Acres $ 150.00 $742.50 4 Spillways(includes pyramat,revegetatios and riprap) 2.00 EA $35,000.00 $70,000.00 Subtotal .$7.9,770;43 C. Phase 3(Inouye) 1 Final grade and place 6"of topsoil on the entire disturbed area 4,033 CY $1.13 $4,557.65 2 Seed and mulch 5.00 Acres $1,736.69 $8,683.47 3 Scarify ground 5.00 Acres $150.00 $750.00 4 Spillways(includes pyramat,revegetatiou and riprap) 2.00 EA $35,000.00 $70,000.00 Subtotal 483;691-12 D. Phase 4a(Inouye) 1 Final grade and place 6"of topsoil on the entire disturbed area 4,033 CY $1.13 $4,557.65 2 Seed and mulch 5.00 Acres $1,736.69 $8,683.47 3 Scarify ground 5.00 Acres $150.00 $750.00 4 Spillways(includes pyramat,revegetatiou and riprap) 2.00 EA $35,000.00 $70,000.00 ,, Subtotal '°$&3 991".12-# E. Phase 4b(Inouye) 1 Final grade and place 6"of topsoil on the entire disturbed area 4,033 CY $1.13 $ 4,557.29 2 Seed and mulch 5.00 Acres $1,736.69 $ 8,683.45 3 Scarify ground 5.00 Acres $150.00 $ 750.00 4 Spillways(includes pyramat,revegetatiou and riprap) 2.00 EA $35,000.00 $ 70,000.00 ,. 4,.4g1 X, .. r.., ,`. v., -Subtotal;;,-248%990:1,k,14, F.. Processing Area. Sand,gravel,concrete and asphalt materials are a commodity and therefore no cost would be incurred for reclamation. In addition,the mobile sales office and scale will have a value that would offset any cost for reclamation. 1 Move surge piles into settling/silt pond 1,000 CY $ 1.05 $ 1,050.00 2 Remove concrete pad for concrete plant 8 CY $ 65.00 $ 520.00 3 Remove concrete pad for asphalt plant 8 CY $ 65.00 $ 520.00 4 Remove concrete pad for recycling plant 5 CY $ 65.00 $ 325.00 5 Remove concrete footings for office 10 CY $ 65.00 $ 650.00 6 Remove concrete base for scale 5 CY $ 65.00 $ 325.00 7 Scarify ground 1.0 Acres $ 150.00 $ 150.00 8 Spread 6"topsoil 807 CY $ 1.05 $ 846.83 9 Seed and Mulch 1.0 Acres $ 800.00 $ 800.00 r Subtotal '$./ , 1;8683 G. Slurry Wall-Assuming a total of 9936 If of wall,assumed depth of 40'+ 3'into base 1 Excavation,Materials and Labor and Dewatering 743,223 Face Ft $ 4.00 $ 2,972,892.00 Subtotal $2.972,892:00:~' Total Disturbance Costs = S-43,572,043.48 Indirect.Costs' Overhead&Profit Performance Bond(2.02%)-Based on DRMS estimate $ 72,155.28 Performance Bond(3.07%)-Based on DBMS estimate $ 109,661.73 Job Superintendent(280 hours @$75/hr)-Based on DRMS estimate $ 21,000.00 Contractor Mob and DeMob(3%)-Based on DRMS estimate $ 107,161.30 Contractor Overhead and Profit(10%)-Based on DRMS estimate $ 357,204.35 r r` Subtotal $ :-,667,182.672 Contract Amount(direct+O-&P) $ 4,239,226.14; Legal,Engineering&Project Management Financial warranty processing(legal/related costs)($500) $ 500.00 Engineering Work and/or contract/bid preparation(4.25%) $ 180,167.11 Reclamation management and/or administration(5%)-Based on DRMS estimate $ 211,961.31 Contingency(3%) $ 107,161.30 . Subtotal S. 499,789.72, Total Indirect Costs $=1,166,972.39' fTU nd Amount ,, EXHIBIT M -OTHER PERMITS AND LICENSES The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.13 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: The Operator will apply for the following permits prior to mining: Colorado Department of Public Health and Environment • Air Pollution Emission Notice (APEN) Permit • Colorado Discharge Permit System (CDPS) and Stormwater Management Plan Colorado State Engineer's Office • Substitute Water Supply Plan (SWSP) • Well Permit City of Fort Lupton • Annexation—City of Fort Lupton • Use by Special Review—City of Fort Lupton • Flood Hazard Development Permit Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit M- 1 EXHIBIT N -SOURCE OF LEGAL RIGHT TO ENTER This information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.7 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations. Please refer to the attached legal right-to-enter documents. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit N-1 June 19, 2018 Mark Johnson, Bumco Colorado,LLC 301 Centennial Drive Milliken, CO 80543 RE:Legal Right to Enter Dear Mr.Johnson: In exchange for good and valuable consideration,hereby grants to Bumco Colorado,LLC the right to enter into the real property situated in The North Half of the Southwest Quarter(N1/2 SW114)of Section Thirty-one(31),Township Two North(T.2N.),Range Sixty-six West(R.66W.)and the East 60 acres of the East Half of the Southeast Quarter(E1/2 SE1/4)of Section Thirty-six(36),Township Two North (T.2N.),Range Sixty-seven West(R.67W.)of the Sixth Principal Meridian(6th P.M.),County of Weld, State of Colorado. Refer to Exhibit for legal description. You and your officers,employees,contractors,and agents have permission to enter upon the Property for all purposes,including the exploration for gravel,sand and aggregate. We hereby confirm that you have authority and right to execute all documents required to apply for and obtain permits and the like to mine gravel,sand and aggregate and access the property. Following permitting,Bumco Colorado,LLC agrees to enter into a Sand,Gravel,and Aggregate Mining Lease to remain in effect until mining activity ceases. The permission granted by this letter shall be effective immediately,and shall remain in effect until superseded by a Sand,Gravel and Aggregate Mining Lease or until 2030,whichever comes first. TRICYCLE TEXAS AC By: at* it"-- Clifford Hah STATE OF ) )ss. COUNTY OF ) The foregoing instrument was acknowledged before me on G-le- l8 ,byCl iQer„t11*4 VtaresacitrA ofrrietela ,e.' tosUiNifness my hand and seal. My commission expires: 4 'i 12 . 44 0%, KRISTI PYATT Notary Pub ? Notary Public,State of Texas i :6t Comm.Expires 04-15.2022 .3•Z „ �. Notary ID 1241306 EXHIBIT-LEGAL DESCRIPTION OF LEGAL RIGHT TO ENTER LANDS Prom*Descrlrtloq; LAND PARCEL DESCTRIPTION The North Half of the Southwest Quarter(N1/2 SW1/4)of Section Thirty-one(31),Township Two North (T.2N.),Range Sixty-six West(R.66W.)and the East 60 acres of the East Half of the Southeast Quarter (E1/2 SE1/4)of Section Thirty-six(36),Township Two North(T.2N.),Range Sixty-seven West(R.67W.) of the Sixth Principal Meridian(6th P.M.),County of Weld,State of Colorado. EXCEPTING THEREFROM: That parcel of land described in that Quitclaim Deed recorded August 3, 1993 as Reception No. 02344482 of the records of the Weld County Clerk and Recorder. Said described parcel contains 142.625 Acres,more or less(±). June 16, 2020 Mark Johnson, Burnco Colorado, LLC 301 Centennial Drive Milliken, CO 80543 RE: Legal Right to Enter Dear Mr. Johnson: In exchange for good and valuable consideration, the City of Fort Lupton hereby grants to Burnco Colorado, LLC the right to enter into the real property situated in the Southeast Quarter of the Southwest Quarter of Section 31, Township 2 North, Range 66 West, referred to as the Fort Lupton Waste Water Treatment Plant Site. You and your officers, employees, contractors, and agents have permission to enter upon the Property for all purposes, including the exploration for gravel, sand and aggregate. We hereby confirm that you have authority and right to execute all documents required to apply for and obtain permits and the like to mine gravel, sand and aggregate and access the property. Following permitting, Burnco Colorado, LLC agrees to enter into a Sand, Gravel, and Aggregate Mining Lease to remain in effect until mining activity ceases. The permission granted by this letter shall be effective immediately, and shall remain in effect until superseded by a Sand, Gravel and Aggregate Mining Lease or until 2030, whichever comes first. City of Fort Lupton By: STATE OF ) ) ss. COUNTY OF ) The foregoing instrument was acknowledged before me on , by , as of . Witness my hand and seal. My commission expires: . Notary Public EXHIBIT - LEGAL DESCRIPTION OF LEGAL RIGHT TO ENTER LANDS Property Description: The Southeast Quarter of the Southwest Quarter of Section 31, Township 2 North, Range 66 West North PARCEL: FTL 16237 SE4SW4 31 2 66 The north parcel contains 40 acres. SOUTH PARCEL: FTL 15812-A PT E2NW4 61 66(WESTSIDE ANNEX) BEG S89D57'E 1451.85' OF NW COR SEC S89D57'E 1334.95'S0D53'W 108.63'TO W LN HWY 85 BYPASS S15D03'W 61.98' SO4D25'W 453' S05D59'W 383.1' N89D27'E 49.8'S0D27'E 309' S09D13'W 1287.7'TO N LN HWY 52 S88D23'W 1045.47'TO PT 46.96' N01 D01'W OF SW COR E2NW4 N01 D01'W 528.04' N88D58'E 165' N01 D01'W 264'S88D58'W 165' N01 D01'W 1819.39'TO BEG The south parcel permit boundary excludes 53.06 acres on the south and contains a total of 18.94 acres. EXHIBIT O -OWNERS OF RECORD OF AFFECTED LAND (SURFACE AREA) AND OWNERS OF SUBSTANCE TO BE MINED The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.15 of the Colorado Mined Land Reclamation Board Construction Material Rules and regulations: Owners of Surface Area and Owners of Substance to be mined The property and the substance to be mined are owned by Tricycle Lane Texas, LLC.And the City of Fort Lupton. The following are Mineral Owners: TRICYCLE LANE TEXAS LLC 11401 COUNTY ROAD 9 3/4 LONGMONT, CO 80504-9704 CITY OF FORT LUPTON 130 SOUTH McKINLEY AVENUE FORT LUPTON, CO 80621 Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit 0-1 EXHIBIT P- MUNICIPALITIES WITHIN Two MILES The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.16 of the Colorado Mined Land Reclamation Board Construction Material Rules and regulations: List any municipalities within two miles of the proposed mining operation and address of the general office: City of Fort Lupton 130 S. McKinley Ave. Fort Lupton, CO 80621 Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit P-1 EXHIBIT Q- PROOF OF MAILING OF NOTICES TO COUNTY COMMISSIONERS AND CONSERVATION DISTRICT The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.17 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit Q-1 EXHIBIT R- PROOF OF FILING WITH COUNTY CLERK OR RECORDER - The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.18 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations. • Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit R-1 EXHIBIT S - PERMANENT MAN-MADE STRUCTURES The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.19 of the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations. Where mining will adversely affect the stability of any significant, valuable or permanent man-made structure located within 200 feet of affected/and, the applicant may either: a) Provide a notarized agreement between the applicant and the person(s)having an interest in the structure, that the applicant is to provide compensation for any damage to the structure;or, b) The applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation:or c) Where the structure is a utility, the Applicant may supply a notarized letter stating that the mining and reclamation as proposed will have no negative effect on their utility. The known, permanent, man-made structures within 200 feet of the proposed mine areas are listed as follows: • TRICYCLE LANE TEXAS LLC and CITY of FORT LUPTON • VARIOUS BUILDINGS AND UTILITIES OWNED BY THE LAND OWNERS • WCR 141/5&ROW(WELD COUNTY PUBLIC WORKS) • OVERHEAD POWER LINE(NORTHERN &SOUTHERN BOUNDARY)(UNITED POWER) • OVERHEAD POWER LINE(WESTERN BOUNDARY)(UNITED POWER) • OVERHEAD POWER LINE(WCR 14 1/2)(UNITED POWER) • VARIOUS GAS LINES and ACCESS ROADS(KERR- MCGEE/ANADARKO, &KP KAUFMAN) • INOUYE 44-36 WELL HEAD(KP KAUFMAN) • FUNAKOSHI SAM GU N02(KERR-MCGEE/ANADARKO) • INOUYE 9-36A WELL HEAD(KERR-MCGEE/ANADARKO) • GRASSHOPPER WELL HEAD(KERR-MCGEE/ANADARKO) • INOUYE 11-31A WELL HEAD(KERR-MCGEE/ANADARKO) • VYNCKIER DONALD GU B N02(KERR-MCGEE/ANADARKO) • NOUYE 15-31A WELL HEAD(KERR-MCGEE/ANADARKO) • FIBER OPTIC IN WCR 141/2 ROW(CENTURY LINK) • LUPTON BOTTOM DITCH Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit S-1 Please refer to the attached engineering stability analysis that shows that structures shall not be damaged by activities occurring at the mining operation. Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment Exhibit S-2 April 13, 2020 Mr. Roy Vestal, P.E. Public Works Director/City Engineer City of Fort Lupton 130 South McKinley Avenue Fort Lupton, CO 80621 Re: Stability Analysis for the WWTP Permit Amendment to the Inouye Gravel Mine Dear Mr. Vestal: This letter has been prepared to address the Mined Land Reclamation Board(MLRB)Construction Materials Rule 6, Section 4,Subsection 19, Exhibit S-Permanent Man-Made Structures(6.4.19, Exhibit S)for the proposed Waste Water Treatment Plant(WWTP)Permit Amendment to the Inouye Gravel Mine. A previous stability analysis was prepared for the Inouye Gravel Mine as documented in our letter report to Bestway Concrete dated May 31,2018. The Stability Analyses presented herein apply to the Permit Amendment to add two evaporation ponds located north of the WWTP to the Inouye permit. The Inouye Mine is located at and in the vicinity of 12210 Weld County Road(WCR) 14.5 in Weld County, Colorado. The WWTP Permit Amendment is accessed from 12285 State Highway 52, Fort Lupton, Colorado. This letter describes the WWTP project and slope stability analyses utilized to evaluate the minimum distance between the edge of mining and nearby structures to avoid damage to the structure. The site is in an area of irrigated agricultural land with common oil and gas wells and related infrastructure. The WWTP part of the mine was formerly utilized as two evaporation ponds located north of the WWTP. The WWTP area to be mined is bordered by a drainage ditch to the west and north,the South Platte River on the east,and United High Voltage lines and the Fort Lupton WWTP on the south. The mine and vicinity are shown on Figure 1. The WWTP area of the mine will be mined as one cell. The WWTP cell will be lined with a slurry wall and will be reclaimed as a below grade reservoir. The Nearest structure to the cells are utilities formerly used to transfer liquids to the former ponds. These utilities are to be abandoned. The nearest structures to remain are a fence and the United Power high voltage lines. The fence is owned by the City and is present on the east, north, and west sides of the mine approximately 45 feet from the mine limit. The United high voltage lines are on the south side of the mine approximately 56.5 feet from the mine limit. The closest structures of the WWTP are approximately 125 feet from the mine limit. Based on the stability analyses,this report indicates that the setbacks and perimeter slopes in the mining plan are sufficient to protect structures within 200 feet of the permitted mining boundary. Actual setbacks may be greater due to permit limitations,zoning requirements,construction issues,agreements with owners,and extent of economically mineable aggregate or other issues. GEOLOGY The site is located approximately 20 miles east of the eastern flank of the Rocky Mountain Front Range. Younger sedimentary strata dip eastward off the Pre-Cambrian igneous and metamorphic rocks that form the core of the Front Range into the Denver Structural Basin. The Denver Basin is an asymmetrical downwarp of sedimentary strata with a steeply dipping west limb and a gently dipping east limb. Bedrock does not crop out at the site, however regional geologic mapping of the area(Colton, 1978) indicates the near surface bedrock at the site is most likely either the Laramie or the Denver and Arapahoe Formations(Colton, (1978) maps the Denver and Arapahoe Formations as undifferentiated). Colton(1978)describes the Laramie as mostly claystone,shale,sandy shale,and lenticular sandstone. Colton(1978)describes the Denver and Arapahoe Formations as claystone and siltstone interbedded with tuffaceous sandstone and conglomerate. The regional mapping indicates the bedrock is overlain by the Piney Creek Aluvium. Colton (1978)describes the Piney Creek as sandy and gravelly Mr. Roy Vestal, P.E. April 13, 2020 Page 2 alluvium in which the upper part is characterized by a weakly developed brown soil. GEOTECHNICAL CONDITIONS Based on the site investigations,the natural site stratigraphy generally consists of three main units: 1) Fill soils generally consisting of near surface clayey sand to sandy clay with local debris; 2)sand and gravel alluvial deposits that underlie the fill and overlie the bedrock;and 3)bedrock usually consisting of sandy claystone, siltstone,and sandstone that is commonly weathered in the top foot and is commonly interbedded. Fill The fill typically grades from a clayey sand to a sandy clay that is of low plasticity typically ranging from approximately 4.5 to 10 feet in thickness. This unit is usually slightly moist to moist and stiff to very stiff or medium dense to dense with local areas where the top 6 to 8 inches containing significant organics. Sand&Gravel The sand and gravel encountered is present throughout the site typically underlying the fill and overlying the bedrock and ranges from approximately 27 to 48 feet in thickness. This unit typically consists of slightly silty,fine to medium grained, locally coarse grained sand with local sandy gravel also present. Local thin sandy clay to clayey sand lenses were locally encountered within this unit. Where encountered,gravels were typically 1 to 2 inches in diameter. Local cobbles up to 4-inches were also locally encountered. Bedrock The bedrock was encountered at depths ranging from approximately 31 to 55 feet below the ground surface in the exploratory borings. Bedrock was generally weathered in the upper one foot typically became harder in unweathered zones. The bedrock consisted of claystone,siltstone and sandstone that were commonly interbedded. Local lignite was also encountered. The claystones are typically moderately to highly plastic. The siltstones and sandstones are non- plastic to lowly plastic. Groundwater Groundwater was encountered in all of the borings at approximately 4 to 14 feet below ground surface.The groundwater levels will vary seasonally and will typically rise during the irrigation season and during high river stages. Groundwater will be controlled with the proposed below grade slurry walls and by pumping down the water level during mining. After slurry wall construction,groundwater mounding is anticipated on the upgradient(south and west)side of the site and a groundwater shadow(deeper water table)is anticipated on the downgradient(north and east)side the site. From a geotechnical standpoint,the sand and gravel will form the majority of the mine slopes. These soils are generally strong and stable, particularly when dewatered. STRUCTURES WITHIN 200 FEET OF DISTURBED AREAS The known, permanent, man-made structures within 200 feet of the proposed mine areas that are not owned by the City of Fort Lupton are listed below: • United Power High Voltage lines located approximately 56.5 feet south of the south mine limit • A gas/oil tank battery access road approximately 145 feet west of the west mine limit on the opposite side of the drainage channel. • A gas line(Kerr-McGee/Anadarko&KP Kaufman)approximately 190 feet north of the north mine limit. STABILITY ANALYSES The Division of Reclamation and Mining Safety(DRMS)staff drafted a policy regarding stability analyses of neighboring structures. The draft summarizes adequate factors of safety(FOS)for non-critical and critical structures. The structures around the WWTP mine cell are,for the most part,considered critical structures. Discussions the author of the memo, Mr. Roy Vestal, P.E. April 13,2020 Page 3 Mr. Tim Cazier, indicate the FOS will be adopted by the MLRB. The FOS are for both static and seismic(from an earthquake)stability analyses. For generalized strength assumptions and critical structures,an FOS of 1.5 is considered sufficient for static conditions and an FOS of 1.3 is considered suitable for seismic conditions. The stability of structures within 200 feet of the proposed mining limits was evaluated at three sections under anticipated loading conditions around the perimeter of the site as discussed below. The computer program XSTABL was used for the analysis. The method for selecting the critical failure surface for each analyzed loading condition is the following. The Modified Bishop's Method of Analysis is used to find the critical failure surface by randomly searching with 20 termination points and 20 initiation points(4D0 failure circles)with 7 foot line segments over a broad range of the slope surface and at the structure in question. This procedure is repeated over different initiation and termination locations until the most critical factor of safety failure surface is identified. The range is narrowed and 20 initiation points and 20 termination points(400 failure circles)with 7 foot line segments for the final run of 400 circles to determine the lowest factor of safety. Therefore, prior to submitting the final stability run,at least 800 failure surfaces were analyzed to determine the lowest factor of safety. Both static stability under anticipated mining conditions and seismic stability under peak ground acceleration loads were performed. Seismic loading was obtained from the U.S.G.S. Unified Hazard Tool. Review of the Hazard Tool indicated a maximum horizontal acceleration of 0.091g with a return period of 2,475 years for the site. The three cross section locations were selected and analyzed as described below. All of the cross sections were modeled with a 3:1 (horizontal:vertical)at the mine limit. The locations are shown on the attached Figures. ► Section 1: This section is on the east part of the south side of the mine cell and considers the point where the tallest mine high wall(deepest bedrock)in this cell is closest to a critical structure(the United high voltage line). The power line is approximately 56.5 feet from the mine limit. This is also an area where groundwater mounding is anticipated on the south side of the slurry wall and the groundwater table will be more elevated. ► Section 2: This section is on the west side of the cell where the tank battery access road is approximately 145 feet from the highwall. Groundwater mounding is anticipated in this area. ► Section 3: This section is on the north side of the cell and considers the point where the Kerr-McGee/Anadarko gas line is closest to the cell. The gas line is north of the drainage channel approximately 190 feet from the cell high wall. ► Section 4: This section is on the west part of the south side of the mine and considers the part of the mine where the United Power high voltage lines are closest to the mine. The Waste Water Treatment Plant is also in this area and is modeled with a 3,000 pounds per square foot(psf)at the nearest building to the mine limit. The high voltage lines are approximately 56.5 feet from the mine limit. The nearest structure of the WWTP is approximately 125 feet from the mine limit. MATERIAL PROPERTIES The material index and engineering strengths assumed in this slope stability report are discussed below. Fill The strength properties for the insitu clayey sand to sandy clay fill were based on our engineering judgment;the following parameters have been used to model the overburden. The fill is weaker that the underlying sand and gravel and ranged in thickness from 2 to 5 feet. Dry Unit Moist Unit Saturated Unit Cohesion C'psf Friction Angle 0'° Weight(pcf) Weight(pcf) Weight(pcf) 103 114 126 50 28 Mr. Roy Vestal, P.E. April 13, 2020 Page 4 Alluvial Sand and Gravel The sand and gravel is generally a fine to medium-grained, locally coarse grained sand locally grading to sandy gravel and is the thickest unit in the mine highwall. The alluvial sand and gravel was modeled as follows: Dry Unit Moist Unit Saturated Unit Cohesion C'psf Friction Angle(P'° Weight(pct) Weight(pcf) Weight(pct) 119 129 130 0 35 Bedrock Bedrock below the alluvium is claystone,siltstone,and sandstone that is commonly interbedded and weathered in the top foot. Sandstone and siltstone are typically stronger than claystone. Claystone is generally a weak bedrock. Because of the common sandstone and siltstones and the interbedded nature of the bedrock,we modeled the bedrock as sandy claystone. For the sandy claystone bedrock both weathered and unweathered strength conditions were considered. Based on the borings at the site,the weathered bedrock was modeled with less cohesion and a slightly lower friction angle. Dry Unit Moist Unit Saturated Unit Angle le�'° Weight(pcf) Weight(pct) Weight(pcf) Cohesion C psf g Unweathered= Unweathered= Unweathered= 116 126 135 = 100 Unweathered=29 Weathered= 110 Weathered Weathered=50 Weathered=28 Soil-Bentonite Slurry Wall The proposed slurry wall will consist of a mix of the overburden sandy clay to silty sand, alluvial sand and gravel, bentonite slurry, and imported bentonite. The resulting mix will produce a non-Newtonian fluid with some shear strength characteristics based on a reduced friction angle of the overlying overburden. Based on engineering judgment,we modeled the slurry wall as follows: Dry Unit Moist Unit Saturated Unit Angle le 0'° Weight(pct) Weight(pcf) Weight(pcf) Cohesion C psf g NA 112 115 0 0 STABILITY ANALYSES RESULTS The stability analyses assumed the mining will be per the mine plan. The plan includes dry mining in the cell as water levels will be controlled by the slurry wall. The perimeter mine slopes will be no steeper than 3:1 horizontal to vertical. For conservatism, Civil Resources modeled the weaker fill material as 5 feet thick effectively lowering the height of the stronger sand and gravel. The most critical sections(listed in Table 1 below)were analyzed. These critical sections were based on one or a combination of the following factors: 1)structure proximity, height of the mine highwall,and/or higher groundwater. Setbacks listed in Table 1 (below)indicate the setback from the structure to the mining limits. The setback distance can be increased as needed to address other restrictions. Mr. Roy Vestal, P.E. April 13,2020 Page 5 The factor of safety shown below is the minimum factor of safety of the conditions listed above. TABLE 1 -SLOPE STABILITY RESULTS AND SETBACKS Section Location Critical Structure Static Factor of Seismic Factor of DRMS Draft FOS Structure Setback From Safety at Safety at Structure Requirement Mine Limit(ft) Structure (0.091g horizontal) Static/Seismic Overhead East side of High 1 South Highwall Voltage 56.5 2.3 1'6 1.5/1.3 Powerline (United) Tank 2 West side of Battery 145 2.7 1.7 1.5/1.3 Cell Access Road 3 North side of Gas Line 190 3.3 1.8 1.5/1.3 Cell (KM/A) South Side of Overhead Cell Near High W 4 WTP(with Voltage 56.5 2.3 1.6 1.5/1.3 3,000 psf Powerline surcharge at (United) WWTP) Notes: KMA=Kerr-McGee/Anadarko CONCLUSIONS Stability analyses were performed on the most critical sections listed above. Other structures will be safer due to increased distance from the mine highwall,shorter highwalls,and/or more favorable groundwater conditions. Based on the Factors of Safety listed in the table above,the mine will not be a hazard to neighboring structures provided the structure and slurry wall offsets,as well as the perimeter mine slopes,follow the mine plan. Mr. Roy Vestal, P.E. April 13, 2020 Page 6 LIMITATIONS Our review is based on regional geologic mapping, present mining plans,and in part borehole data by Civil Resources. Stability analyses were performed using typical strength parameters for the various strata in the critical sections discussed above. Should the mining plans change or subsurface conditions vary from those portrayed in this letter,we should be contacted in order to re-evaluate the potential affects on permanent man-made structures. Stability analyses were run at the structure in question and were not run on failure surfaces closer to the highwall. Note also that surcharge loads due to temporary material stockpiles and overburden berms were not considered in the analysis. Please call with any questions or comments. Sincerely, Civil Resources, LLC Gary Linden, P.G. Senior Engineering Geologist Attachments: Figure —Slope Stability Cross Sections Locations Plan(from mining plan) Figure —Slope Stability Cross Sections(from mining plan and XSTABL Output) Boring Locations XSTABL Model Outputs:Sections 1,2,3, &4 REFERENCES Colton,R.B., 1978,"Geologic Map of the Boulder-Fort Collins-Greeley Area, Colorado", U.S.G.S. Map l-855-G. J:Ift.lupton\WWTP\DRMS1Stability Analysis\WWTPIStability analysis report-WWTP.doc 1 COUIVTYROAD 145 C� I � 4887 r ~ ,,Q°�= FUTURE ROW ) �)� CIVIL RES"atURCES, LLC CENTURY LINK . • CENTURYLINK J• _ ----. '•` I �� _��_ — �� 323$5h STREET -7--_,_ '� • _• a•■.��. 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REVISIONS POND 15 4 ACRES+/ B P PLATTED ___700 YR FLOOD PLAIN =�� I� M MEASURED a 1 I 3H 1V SPILLWAY INVERT x MONITORING WELL =�� RECLAIMED I' EL 4892 O fi BORE LOCATION D 4X EXISTING GROUND SLOPE I♦—I_ • t \ \ TIE RUN DOWN //�j7 ®MW 3 MONITORING WELL SOUTH PROPERTY OWNER -- -_ SILT STORAGE j Yl INTO BEDROCK (1/// /S :�� 15 a aCRE5+/ / PLATTE 1 DEEP 5TlWNG 4 i # BASIN mP) illpIAIL �Ir,,..r V.• VALLEY,yi to HIL I; _—� '4 / SCIETY /DR/A • ,58548) Qco ` EXISTING - o " ---4:;_=-=---- 11'; / Q .4 G• CROSS SECTION CALL OUT IRRIGATION i �MW 5 I I` '''-',%N. �' _ „r r.yv°'�� © WELL - t " � —+T -h OHE -• .---• - � _ �,: =1 •' E OHE OHE OHE OHE -'� - •aI n:i: •_ -i ...a .l �..I; 0 F��.;E 0 OHE O� UNITED POWER OHE \J I I•❑ ' r1 ❑ ' ( % -°�11!1 I UNTIED POW/ER I IL,-1MI RE OF FUSE PILE' \ I I �I I / I if ITS OF AVEL�/ I • /UMI A ASPHAL PILE ((` CON yl� DATE lone NIB /' LO DESIGNED BY /� I .7c-„4; \ vY DRAWN BY �- SCALE.AS NOTED I \ WWTP FACILITIES \ I ..-I— \B VARIES FROM MINE PERMIT/PROPERTY UNE/ROW OR EASEMENT NO LESS THAN 20 - CHECKED BY GI" AS NOTED TEMPORARY TOPSOIL300 JOB NO 213 001 29 NOTE STOCKPILE SE BACK DWG NAME ONE ELSTINGCOMMIONSINOU151111010VG CIVIL RESOURCES LLC IS NOT RESPONSIBLE FOR SAFETY IN ON OR ABOUT THE 1Z 100 PROJECT SITE NOR FOR COMPLIANCE BY THE APPROPRIATE PARTY OF ANY SETBACK EIOSBNG GRADE REGULATIONS THERETO PLAN VIEW OF I GROUNDWATER SLURRY WALL THESE MAPS WERE PREPARED BY CIVIL RESOURCES LLC IN COOPERATION WITH TABLE BURNCO COLORADO LLC BESTWAY WILL KEEP THE DIVISION OF RECLAMATION MINING RECLAMATION PLAN AND SAFETY INFORMED OF ANY CHANCES TO THE MINING OR RECLAMATION PLANS THROUGH ANNUAL REPORTS AND FILE TECHNICAL REVISIONS AND AMENDMENT 1 AND SECTIONS APPLICATIONS AS NECESSARY THROUGHOUT THE LIFE OF THE MINE 3 - DEWATERING TRENCH `BOTTOM OF POSITIVE DRAINAGE TO SUMP SHEET GRAVEL RESERVE TYPICAL - RECLAMATION CROSS SECTION 1 - NOT TO SCALE I I J - CIVIL RESOURCES, LLC 323 5th STREET P 0 Box 680 FREDERICK,CO 80530 303 833 1416 4720 WWW CIVILRESOURCES COM I _—— ___ — STA 72+03 43 I ---- I81 ---- ----- I--4910- -r - TEMP i ' ---'- — PLATFORM —25- - 25 r 22 - -RIVER IS 159 4900- -- _ -TO THE EAST' _ L- ' _-1 STA_0+99188_,_--------7 - _—STA_L+92.15_ - _ ! _ _ FENCE UNE _I` `--4890- , EL_4888 87 EL 4889 17 STA-2+28 05 I — )- --� — ,' T = EL X489484 —1 1 —_48BD_ BURNCO COLORADO,LLC 1 -_1-_ _ I __ i ' 47 _ STA 2+s3 40 i --� I-- 1 _ 1 EL'4S-95736 / 58 -j- ' — 1 4870 __J,___ I — I 301 CENTENNIAL DR 1 SLURRY J __ {---- 3H L MINE/ �- — WALL I 1 4860- _ 1 __ --- '_ _ ,RECLAIM SLOPE 1 MILLJKEN CO 80543 — —-- 970 587 7277 � , -- BEDROCK - - 4850- 1 1 _ _-- 1 CONTACT MARK JOHNSON - - �___ 77_77 7 7 77 7_7_7_y-7-7-7-7-7-7 17-7-7 7 7 7 7 77-4-7 7 77 77✓-! /-11---7-7-7-'-,-7-7-- _L 4840- ' _ -- _ -1--- 1 1 1 I 4830- 1 I ! 1 I 4020 n n n w m m m m m m m m m m c a w w �I UI �I �I 0 �I �I �I �I II w w w w w w W w w w W W 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 0 ,--I p 1 CROSS SECTION 0 < 3 6 I s 1, L.-.(617111}) Q O J W W Q 4020 U —— TEMPORARY--j — ---- —� 0 - I HSLURRY WALL J — — a_4 949 j 4910— y z __ WORK PLATFORM_ !Sra�s>t ae r_ 1 L J 0 sm-0+0001 I IT_ _SM.'1,8 SW cz Iearm DRAIN _- - t I—sm.2+8,4r I--1 �¢.�sesau EXISTING __ a sees es '—` \ sxt->/w>a ,—a-"8-'8°1 4900_ W I'"' -ib 25� 26'� n seas ro > d GRADE 1_ -~ 1 -, \' - I _ _-I 4890- Q — SLURRY —sn1a+>IJeJ 4880- III -- t----- 3H 1V WALL FENCE _ �''_ ' ___ __ v -— MINE/RECLAIM SLOPE - - 33 —� - -- -- LINE! __ PERMIT ti_- 0+0004 _ LL _I 42 _ _ BOUNDARY —r-'- 4870- 'ILL 7 25 -- I - - BEDROCK I_ -- —I j _ 63 I_ 777_17'7777 77=7,=777777r7f7777777-7-7-7- 7_7_y7777777`7777�777y77ag6� ____77-17-_7—_7 -- aeso- -- i- I —-- —y I- i 4840— - -- — — I I` 4030 g ZIT, REVISIONS II it �I▪ it U U II 3 �I II 3 3II w l w w• w w w w w w w w w w NO DESCRIPRON DATE 0+50 1+00 1+50 2+00 2+50 3+00 1 2 CROSS SECTION 2 5 L —(..n 1 4920 -- I PERMIT BOUNDARY 1 ' 1 STA 1+64157 i OHE _ 563 TO THE SOUTH------4910 - - 1 -- - EL 489537 1 ��l STA-1+41-76 ` 7 - EL__4895 00- _`-{-{ — I- ,-- - EXISTING -- 4900- 1 ! T 22 25 33 _�/ GRADE I - -- 1 - - - - r ___---------------•- -� 1 - \ SECTION - ! �_ -_—4890- -_ - ---- _ _ I J TTEMP PLATFORM SLURRY - UNE/PARCEI STA 0+0000 !--_—_�_—� _ 1 _ 1 T�WALL BOUNDARY 1 4880- -- EL 4854 07 _36 -r-- 3H 1 V MINE/ -.I _ --L _I —__ — TE4870- -1 1 RECLAIM SLOPE 49]_-___ DESIGNED BY SI_ DATE JUNE,]ate --- _ -- - -1 —__ -4860- DRAWN BY ABB SCALE,AS NOTED 1 7-7-7-7-7——77777777774i-177i-777 7 It?777-7-7-7-7 7-I? 77 7'7 1 7 7-7-7x77 j 4850- CHECKED BY AS NOTED L —_ Joe no 213 W129 -- I -- ----BEDROCK _` _ — 7'l__ �I .-4e40— DWG NAME,COVEA EODTIG WNORIOIISIMODY.RIIL0IJG — —� -- I ___T__ ---_--I -- j 4030 us SECTIONS W w 6 8It W W w W w w w (TYPICAL) 0+00 D+50 , 1+00 1+50 2+00 2+50 3+00 3 CROSS SECTION SHEET 2 5 I 30 (IN MO 2 SEC1Q 4-10-20 15 57 WWTP South Side United Power Seismic 4980 - 10 most critical surfaces, MINIMUM BISHOP FOS = 1 633 4920 _ Ju- 464860 _ - J°-�---- w 1 V) X <4800 - 4740 _ 4680 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC1 4-10-20 15 49 WWTP South Side United Power 4980 - 10 most critical surfaces, MINIMUM BISHOP FOS = 2 302 4920 _ m 4860 _ 4 V X <4800 _ >- 4740 _ 4680 i 1 , I , I . I I , I 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC2Q 4-13-20 9 11 WWTP West Side Access Road Seismic 4980 _ 10 most critical surfaces, MINIMUM BISHOP FOS = 1.725 4920 _ w 4860 _ m W-_W W_ - w w N X <4800 _ >- 4740 _ 4680 I 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC2 4-13-20 8 36 WWTP West Side Access Road 4980 _ 10 most critical surfaces, MINIMUM BISHOP FOS = 2.721 4920 _ 11;4860 _ w---S"-Y--- w v- V7 a 4800 _ 4740 _ 4680 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC3Q 4-13-20 13 40 WWTP North Side KmA Gas Line Seismic 5000 10 most critical surfaces, MINIMUM BISHOP FOS = 1.817 4900 w1 i---, m 4800 a) 4— N X 1 4700 >- 4600 4500 0 100 200 300 400 500 600 700 800 X—AXIS (feet) SEC3 4-13-20 13 34 WWTP North Side KmA Gas Line 5000 10 most critical surfaces, MINIMUM BISHOP FOS = 3.203 4900 a 4800 aD w <n X Q 4700 4600 4500 0 100 200 300 400 500 600 700 800 X—AXIS (feet) SEC4Q 4-13-20 10 25 WWTP South Side United Srchg Seismic 4980 _ 10 most critical surfaces, MINIMUM BISHOP FOS = 1.621 4920 _ 4860 _ w -b-�---- w1 .4- 7<- <4800 _ >- 4740 _ 4680 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC4 4-13-20 1015 WWTP South Side United Power Surchar 4980 _ 10 most critical surfaces, MINIMUM BISHOP FOS = 2.296 4920 _ m 4860 _ m �°-�---- w w 1 (/) <4800 _ >- 4740 _ 4680 0 60 120 180 240 300 360 420 480 X-AXIS (feet) SEC1.OPT 4/10/2020 XSTABL File: SEC1 4-10-20 15:49 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP South Side United Power SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC1.OPT 4/10/2020 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 330.0 ft and x = 375.0 ft Each surface terminates between x = 130.0 ft and x = 144.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. 2 SEC1.OPT 4/10/2020 ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit :_ -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 36 coordinate points Point x-surf y-surf No. (ft) (ft) 1 363.16 4852.00 2 356.96 4848.76 3 350.63 4845.76 4 344.18 4843.02 5 337.64 4840.55 6 331.00 4838.34 7 324.27 4836.39 8 317.47 4834.72 9 310.62 4833.32 10 303.71 4832.20 11 296.76 4831.36 12 289.78 4830.79 13 282.79 4830.51 14 275.79 4830.50 15 268.79 4830.78 16 261.81 4831.34 17 254 .86 4832.18 18 247.95 4833.29 19 241.09 4834.68 20 234.29 4836.35 21 227.57 4838.29 22 220.92 4840.49 23 214.37 4842.96 24 207.93 4845.69 25 201.60 4848.68 26 195.39 4851. 92 27 189.32 4855.40 28 183.40 4859.13 29 177.62 4863.09 30 172.01 4867.28 31 166.58 4871. 69 32 161.32 4876.31 33 156.26 4881.15 34 151.39 4886.18 3 SEC1.OPT 4/10/2020 35 146.73 4891.40 36 142.80 4896.17 **** Simplified BISHOP FOS = 2.302 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP South Side United Power FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 2.302 279.22 5004.91 174.44 363.16 142.80 7.376E+07 2. 2.304 283.61 5020.02 186.92 365.53 143.74 7.501E+07 3. 2.305 278.15 5002.51 174.03 365.53 140.30 7.718E+07 4. 2.307 277.92 4987.64 162.77 367.89 143.26 7.598E+07 5. 2.309 278.90 5011.25 180.16 363.16 140.39 7.615E+07 6. 2.313 278.23 4997. 95 173.82 372.63 137.36 8.431E+07 7. 2.317 279.35 5018.27 186.20 363.16 138.85 7.788E+07 8. 2.318 273.63 4987.75 158.82 356.05 143.95 6.849E+07 9. 2.320 275.01 4990.76 166.97 367.89 137.43 8.114E+07 10. 2.320 274.22 4999.93 171.40 360.79 137.76 7.656E+07 * * * END OF FILE * * * 4 SEC1Q.OPT 4/10/2020 XSTABL File: SEC1Q 4-10-20 15:57 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP South Side United Power Seismic SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC1Q.OPT 4/10/2020 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 A horizontal earthquake loading coefficient of .091 has been assigned A vertical earthquake loading coefficient of .000 has been assigned A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 330.0 ft and x = 375.0 ft Each surface terminates between x = 130.0 ft 2 SEC1Q.OPT 4/10/2020 and x = 144.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 39 coordinate points Point x-surf y-surf No. (ft) (ft) 1 370.26 4852.00 2 364.09 4848.71 3 357.79 4845.64 4 351.39 4842.81 5 344.89 4840.22 6 338.30 4837.86 7 331.62 4835.75 8 324.88 4833.88 9 318.07 4832.26 10 311.20 4830. 90 11 304.29 4829.78 12 297.34 4828. 92 13 290.37 4828.31 14 283.38 4827. 96 15 276.38 4827.86 16 269.38 4828.02 17 262.39 4828.44 18 255.43 4829.11 19 248.49 4830.04 20 241.59 4831.22 21 234.74 4832.65 22 227.94 4834.33 23 221.21 4836.26 24 214.56 4838.44 25 207.99 4840.85 26 201.51 4843.51 3 SEC1Q.OPT 4/10/2020 27 195.14 4846.40 28 188.87 4849.52 29 182.72 4852.87 30 176.70 4856.44 31 170.82 4860.23 32 165.08 4864.23 33 159.48 4868.44 34 154.05 4872.86 35 148.78 4877.46 36 143.68 4882.26 37 138.77 4887.24 38 134.03 4892.40 39 130.76 4896.24 **** Simplified BISHOP FOS = 1.633 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP South Side United Power Seismic FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 1.633 277.17 5019.24 191.41 370.26 130.76 8.741E+07 2. 1.636 274.60 5004.83 180.30 370.26 130.55 8.711E+07 3. 1.638 278.23 4997.95 173.82 372.63 137.36 8.251E+07 4. 1.640 283.48 5038.43 206.65 372.63 133.40 8.730E+07 5. 1.640 277.65 5028.26 198.02 367.89 130.07 8.698E+07 6. 1.641 272.99 5008.28 181.62 365.53 130.03 8.464E+07 7. 1.642 274.17 5005.88 178.95 365.53 132.78 8.214E+07 8. 1.642 284.25 5041.19 208.82 372.63 133.88 8.705E+07 9. 1.642 278.21 4992.33 170.47 375.00 137.37 8.423E+07 10. 1.642 273.98 4998.15 176.33 372.63 130.10 8.940E+07 * * * END OF FILE * * * 4 SEC2.OPT 4/13/2020 XSTABL File: SEC2 4-13-20 8:36 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP West Side Access Road SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC2.OPT 4/13/2020 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 335.0 ft and x = 390.0 ft Each surface terminates between x = 55.0 ft and x = 65.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. 2 SEC2.OPT 4/13/2020 ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 49 coordinate points Point x-surf y-surf No. (ft) (ft) 1 378.42 4852.00 2 372.07 4849.05 3 365.65 4846.26 4 359.17 4843. 62 5 352.62 4841.15 6 346.01 4838.84 7 339.35 4836.69 8 332.64 4834.70 9 325.88 4832.88 10 319.08 4831.22 11 312.24 4829.74 12 305.36 4828.42 13 298.46 4827.27 14 291.53 4826.29 15 284.58 4825.48 16 277.60 4824.84 17 270.62 4824.37 18 263.63 4824.07 19 256.63 4823. 95 20 249.63 4824.00 21 242.63 4824.21 22 235.64 4824.60 23 228.66 4825.17 24 221.70 4825.90 25 214.76 4826.80 26 207.84 4827.87 27 200.96 4829.12 28 194.10 4830.53 29 187.28 4832.11 30 180.50 4833.85 31 173.77 4835.76 32 167.08 4837.84 33 160.45 4840.08 34 153.87 4842.48 3 SEC2.OPT 4/13/2020 35 147.36 4845.04 36 140.91 4847.76 37 134.53 4850.64 38 128.22 4853.67 39 121.99 4856.86 40 115.84 4860.20 41 109.77 4863.69 42 103.79 4867.33 43 97.90 4871.11 44 92.10 4875.04 45 86.41 4879.11 46 80.81 4883.31 47 75.32 4887.65 48 69.94 4892.13 49 64.79 4896.63 **** Simplified BISHOP FOS = 2.721 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP West Side Access Road FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 2.721 255.12 5109.11 285.15 378.42 64.79 1.867E+08 2. 2.726 261.20 5138.80 314.39 390.00 60.74 2.084E+08 3. 2.732 262.98 5153.70 326.23 387.11 61.66 2.051E+08 4. 2.735 258.62 5132.02 308.09 387.11 60.11 2.059E+08 5. 2.736 264.95 5165.76 336.70 387.11 62.15 2.058E+08 6. 2.743 266.64 5177.08 345.69 384.21 64 .04 2.016E+08 7. 2.744 250.01 5084 .40 264.13 375.53 64.12 1.832E+08 8. 2.752 257.45 5133.56 309.98 387.11 57.72 2.100E+08 9. 2.753 250.09 5092.88 271.59 375.53 62.37 1.865E+08 10. 2.754 256.71 5128.57 305.77 387.11 57.38 2.100E+08 * * * END OF FILE * * * 4 SEC2Q.OPT 4/13/2020 XSTABL File: SEC2Q 4-13-20 9:11 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP West Side Access Road Seismic SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC2Q.OPT 4/13/2020 ISOTROPIC Soil Parameters 5 Soil unit(s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 A horizontal earthquake loading coefficient of .091 has been assigned A vertical earthquake loading coefficient of .000 has been assigned A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 340.0 ft and x = 410.0 ft Each surface terminates between x = 55.0 ft 2 SEC2Q.OPT 4/13/2020 and x = 65.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 54 coordinate points Point x-surf y-surf No. (ft) (ft) 1 410.00 4852.00 2 403.58 4849.20 3 397.11 4846.54 4 390.58 4844.01 5 384.00 4841.62 6 377.38 4839.36 7 370.70 4837.25 8 363.99 4835.27 9 357.24 4833.43 10 350.45 4831.73 11 343.62 4830.17 12 336.77 4828.76 13 329.88 4827.48 14 322.97 4826.35 15 316.04 4825.37 16 309.10 4824.52 17 302.13 4823.82 18 295.15 4823.27 19 288.16 4822.86 20 281.17 4822.59 21 274.17 4822.48 22 267.17 4822.50 23 260.17 4822. 67 24 253.18 4822.99 25 246.19 4823.45 26 239.22 4824.05 3 SEC2Q.OPT 4/13/2020 27 232.26 4824.80 28 225.32 4825.70 29 218.40 4826.73 30 211.50 4827.92 31 204.62 4829.24 32 197.78 4830.70 33 190.96 4832.31 34 184.19 4834.06 35 177.45 4835.95 36 170.75 4837.98 37 164.09 4840.14 38 157.48 4842.45 39 150.92 4844.89 40 144.41 4847.46 41 137.96 4850.17 42 131.56 4853.02 43 125.22 4855.99 44 118.95 4859.10 45 112.74 4862.33 46 106.60 4865.70 47 100.54 4869.19 48 94.54 4872.80 49 88.62 4876.54 50 82.78 4880.40 51 77.03 4884.38 52 71.35 4888.48 53 65.76 4892.70 54 60.75 4896. 65 **** Simplified BISHOP FOS = 1.725 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP West Side Access Road Seismic FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 1.725 271.63 5160.77 338.35 410.00 60.75 2.299E+08 2. 1.728 268.89 5152.11 330.08 406.32 60.11 2.258E+08 3. 1.728 264.04 5126.16 303.95 395.26 64.82 2.028E+08 4. 1.730 273.19 5176.25 350.51 406.32 61.65 2.246E+08 5. 1.732 267.59 5153.86 332.21 406.32 57.71 2.304E+08 6. 1.733 266.88 5148.31 327.47 406.32 57.36 2.304E+08 7. 1.734 275.09 5189.80 362.40 406.32 62.17 2.254E+08 8. 1.739 268.70 5173.50 349.71 406.32 55.06 2.366E+08 9. 1.739 261.64 5132.00 310.25 395.26 59.40 2.124E+08 10. 1.740 258.45 5098.94 280.54 391.58 64.14 1.986E+08 * * * END OF FILE * * * 4 SEC3.OPT 4/13/2020 XSTABL File: SEC3 4-13-20 13:34 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP North Side KmA Gas Line SEGMENT BOUNDARY COORDINATES 12 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4890.0 73.0 4890.0 1 2 73.0 4890.0 83.0 4887.0 1 3 83.0 4887.0 85.0 4886.0 2 4 85.0 4886.0 135.0 4886.0 2 5 135.0 4886.0 145.0 4891.0 2 6 145.0 4891.0 155.0 4896.0 1 7 155.0 4896.0 173.0 4896.0 1 8 173.0 4896.0 176.0 4896.0 5 9 176.0 4896.0 200.0 4896.0 1 10 200.0 4896.0 215.0 4891.0 1 11 215.0 4891.0 344 .0 4848.0 2 12 344.0 4848.0 500.0 4848.0 3 14 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 145.0 4891.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4848.0 1 6 176.1 4891.0 176.2 4848.0 5 7 .0 4887.0 83.0 4887.0 2 8 83.0 4887.0 85.0 4886.0 2 9 85.0 4886.0 145.0 4891.0 2 10 .0 4850.0 173.2 4848.0 3 11 176.2 4848.0 344.0 4848.0 3 1 SEC3.OPT 4/13/2020 12 173.2 4848.0 173.3 4845.0 4 13 176.2 4848.0 176.3 4845.0 5 14 173.3 4845.0 176.3 4845.0 4 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 11 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4887.00 2 83.00 4887.00 3 136.00 4887.00 4 160.00 4889.00 5 173.00 4889.00 6 174.00 4851.00 7 179.00 4850.50 8 340.00 4850.00 9 344.00 4849.00 10 345.00 4848.50 11 500.00 4848.00 A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 350.0 ft and x = 440.0 ft 2 SEC3.OPT 4/13/2020 Each surface terminates between x = .0 ft and x = 10.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4760.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees ************************************************************************ ERROR # 28 ************************************************************************ In automatically generating a failure surface, it has been found that more than 100 points are needed to define this surface. The program is limited to a maximum of 100 points. To meet this criterion, please INCREASE the specified length of the line segments. ************************************************************************ ************************************************** *** The above error occurred in attempting *** *** to generate surface # 16 from the *** *** initiation point located at x = 378.42 *** ************************************************** Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 67 coordinate points Point x-surf y-surf No. (ft) (ft) 1 440.00 4848.00 2 433.58 4845.20 3 427.12 4842.51 4 420.62 4839.92 5 414.08 4837.43 3 SEC3.0PT 4/13/2020 6 407.50 4835.04 7 400.88 4832.76 8 394.23 4830.58 9 387.54 4828.51 10 380.82 4826.55 11 374.07 4824.69 12 367.29 4822.94 13 360.49 4821.30 14 353.66 4819.76 15 346.81 4818.33 16 339.93 4817.01 17 333.04 4815.80 18 326.13 4814.70 19 319.20 4813.71 20 312.25 4812.83 21 305.29 4812.05 22 298.33 4811.39 23 291.35 4810.84 24 284.36 4810.40 25 277.37 4810.07 26 270.37 4809.85 27 263.37 4809.74 28 256.37 4809.74 29 249.37 4809.85 30 242.38 4810.07 31 235.39 4810.41 32 228.40 4810.85 33 221.42 4811.40 34 214.45 4812.07 35 207.50 4812.84 36 200.55 4813.73 37 193.62 4814.72 38 186.71 4815.82 39 179.82 4817.04 40 172.94 4818.36 41 166.09 4819.79 42 159.26 4821.32 43 152.46 4822. 97 44 145.68 4824.72 45 138.93 4826.58 46 132.21 4828.55 47 125.53 4830.62 48 118.88 4832.80 49 112.26 4835.08 50 105.68 4837.47 51 99.14 4839.96 52 92.64 4842.56 53 86.18 4845.25 54 79.76 4848.05 55 73.39 4850.95 56 67.06 4853.95 57 60.79 4857.05 58 54.56 4860.25 59 48.39 4863.55 60 42.26 4866.94 61 36.20 4870.43 62 30.18 4874.02 63 24.23 4877.70 64 18.33 4881.47 65 12.50 4885.34 66 6.73 4889.30 67 5.73 4890.00 4 SEC3.OPT 4/13/2020 **** Simplified BISHOP FOS = 3.203 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP North Side KmA Gas Line FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 3.203 259.60 5253.22 443.56 440.00 5.73 4.054E+08 2. 3.210 261.32 5274.57 460.67 435.26 6.64 3.958E+08 3. 3.213 263.19 5294.02 478.06 435.26 7.15 3.981E+08 4. 3.214 249.77 5208.39 399.02 421.05 9.80 3.578E+08 5. 3.216 256.41 5241.18 431.95 435.26 5.09 3.967E+08 6. 3.222 264.56 5311.26 492.09 430.53 9.05 3.883E+08 7. 3.235 255.16 5242.43 433.61 435.26 2.69 4.028E+08 8. 3.238 254.05 5235.62 427.89 435.26 2.36 4.034E+08 9. 3.249 243.54 5170.73 366.06 416.32 9.11 3.484E+08 10. 3.258 262.09 5317.82 500.72 435.26 2.52 4.146E+08 * * * END OF FILE * * * 5 SEC3Q.OPT 4/13/2020 XSTABL File: SEC3Q 4-13-20 13:40 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP North Side KmA Gas Line Seismic SEGMENT BOUNDARY COORDINATES 12 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4890.0 73.0 4890.0 1 2 73.0 4890.0 83.0 4887.0 1 3 83.0 4887.0 85.0 4886.0 2 4 85.0 4886.0 135.0 4886.0 2 5 135.0 4886.0 145.0 4891.0 2 6 145.0 4891.0 155.0 4896.0 1 7 155.0 4896.0 173.0 4896.0 1 8 173.0 4896.0 176.0 4896.0 5 9 176.0 4896.0 200.0 4896.0 1 10 200.0 4896.0 215.0 4891.0 1 11 215.0 4891.0 344.0 4848.0 2 12 344.0 4848.0 500.0 4848.0 3 14 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 145.0 4891.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4848.0 1 6 176.1 4891.0 176.2 4848.0 5 7 .0 4887.0 83.0 4887.0 2 8 83.0 4887.0 85.0 4886.0 2 9 85.0 4886.0 145.0 4891.0 2 10 .0 4850.0 173.2 4848.0 3 11 176.2 4848.0 344.0 4848.0 3 1 SEC3Q.OPT 4/13/2020 12 173.2 4848.0 173.3 4845.0 4 13 176.2 4848.0 176.3 4845.0 5 14 173.3 4845.0 176.3 4845.0 4 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface (s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 11 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4887.00 2 83.00 4887.00 3 136.00 4887.00 4 160.00 4889.00 5 173.00 4889.00 6 174.00 4851.00 7 179.00 4850.50 8 340.00 4850.00 9 344.00 4849.00 10 345.00 4848.50 11 500.00 4848.00 A horizontal earthquake loading coefficient of .091 has been assigned A vertical earthquake loading coefficient of .000 has been assigned A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 2 SEC3Q.OPT 4/13/2020 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 350.0 ft and x = 440.0 ft Each surface terminates between x = .0 ft and x = 10.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4760.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees ************************************************************************ ERROR # 28 ************************************************************************ In automatically generating a failure surface, it has been found that more than 100 points are needed to define this surface. The program is limited to a maximum of 100 points. To meet this criterion, please INCREASE the specified length of the line segments. ************************************************************************ ************************************************** *** The above error occurred in attempting *** *** to generate surface # 16 from the *** *** initiation point located at x = 378.42 *** ************************************************** Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 67 coordinate points 3 SEC3Q.OPT 4/13/2020 Point x-surf y-surf No. (ft) (ft) 1 440.00 4848.00 2 433.58 4845.20 3 427.12 4842.51 4 420.62 4839.92 5 414.08 4837.43 6 407.50 4835.04 7 400.88 4832.76 8 394.23 4830.58 9 387.54 4828.51 10 380.82 4826.55 11 374.07 4824.69 12 367.29 4822.94 13 360.49 4821.30 14 353.66 4819.76 15 346.81 4818.33 16 339.93 4817.01 17 333.04 4815.80 18 326.13 4814.70 19 319.20 4813.71 20 312.25 4812.83 21 305.29 4812.05 22 298.33 4811.39 23 291.35 4810.84 24 284.36 4810.40 25 277.37 4810.07 26 270.37 4809.85 27 263.37 4809.74 28 256.37 4809.74 29 249.37 4809.85 30 242.38 4810.07 31 235.39 4810.41 32 228.40 4810.85 33 221.42 4811.40 34 214 .45 4812.07 35 207.50 4812.84 36 200.55 4813.73 37 193.62 4814.72 38 186.71 4815.82 39 179.82 4817.04 40 172.94 4818.36 41 166.09 4819.79 42 159.26 4821.32 43 152.46 4822. 97 44 145.68 4824.72 45 138.93 4826.58 46 132.21 4828.55 47 125.53 4830. 62 48 118.88 4832.80 49 112.26 4835.08 50 105.68 4837.47 51 99.14 4839.96 52 92.64 4842.56 53 86.18 4845.25 54 79.76 4848.05 55 73.39 4850.95 56 67.06 4853. 95 57 60.79 4857.05 58 54.56 4860.25 59 48.39 4863.55 60 42.26 4866.94 4 SEC3Q.OPT 4/13/2020 61 36.20 4870.43 62 30.18 4874.02 63 24.23 4877.70 64 18.33 4881.47 65 12.50 4885.34 66 6.73 4889.30 67 5.73 4890.00 **** Simplified BISHOP FOS = 1.817 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP North Side KmA Gas Line Seismic FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 1.817 259.60 5253.22 443.56 440.00 5.73 3.996E+08 2. 1.823 261.32 5274.57 460.67 435.26 6.64 3.901E+08 3. 1.824 256.41 5241.18 431.95 435.26 5.09 3.911E+08 4. 1.825 263.19 5294.02 478.06 435.26 7.15 3.922E+08 5. 1.829 255.16 5242.43 433.61 435.26 2.69 3.972E+08 6. 1.831 254 .05 5235. 62 427.89 435.26 2.36 3.978E+08 7. 1.834 264.56 5311.26 492.09 430.53 9.05 3.825E+08 8. 1.835 256.13 5269.24 457.75 435.26 .07 4.071E+08 9. 1.836 264.12 5328.55 511.73 440.00 1.09 4.218E+08 10. 1.836 249.77 5208.39 399.02 421.05 9.80 3.529E+08 * * * END OF FILE * * * 5 SEC4.OPT 4/13/2020 XSTABL File: SEC4 4-13-20 10:15 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP South Side United Power Surchar SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC4.OPT 4/13/2020 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface(s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 BOUNDARY LOADS 1 load(s) specified Load x-left x-right Intensity Direction No. (ft) (ft) (psf) (deg) 1 55.0 75.0 3000.0 90.0 NOTE - Intensity is specified as a uniformly distributed force acting on a HORIZONTALLY projected surface. A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 2 SEC4.OPT 4/13/2020 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 340.0 ft and x = 380.0 ft Each surface terminates between x = 130.0 ft and x = 144.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 37 coordinate points Point x-surf y-surf No. (ft) (ft) 1 369.47 4852.00 2 363.27 4848.76 3 356.95 4845.75 4 350.51 4843.00 5 343.98 4840.50 6 337.35 4838.25 7 330.63 4836.26 8 323.85 4834.53 9 317.01 4833.07 10 310.11 4831.87 11 303.17 4830.94 12 296.20 4830.28 13 289.21 4829.89 14 282.21 4829.78 15 275.22 4829. 93 16 268.23 4830.35 17 261.26 4831.05 3 SEC4.OPT 4/13/2020 18 254 .33 4832.02 19 247.44 4833.25 20 240.60 4834.75 21 233.83 4836.51 22 227.13 4838.53 23 220.51 4840.82 24 213.98 4843.35 25 207.56 4846.14 26 201.26 4849.18 27 195.07 4852.45 28 189.02 4855.97 29 183.10 4859.71 30 177.34 4863.69 31 171.73 4867.88 32 166.30 4872.29 33 161.03 4876. 90 34 155.95 4881.71 35 151.06 4886.72 36 146.37 4891. 92 37 142.81 4896.17 **** Simplified BISHOP FOS = 2.296 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP South Side United Power Surchar FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 2.296 282.64 5010.44 180.67 369.47 142.81 7.756E+07 2. 2.300 281.49 5007.40 179.63 371.58 140.30 8.090E+07 3. 2.301 287.03 5025.69 193.18 371.58 143.75 7.852E+07 4. 2.301 277.50 4993.36 165.29 363.16 143.95 7.256E+07 5. 2.303 282.40 5016.84 186.42 369.47 140.38 7.996E+07 6. 2.304 281.03 4991.87 167.78 373.68 143.24 7.966E+07 7. 2.305 277.30 4998.57 168.81 361.05 143.09 7.216E+07 8. 2.309 277.82 5005.26 177.51 367.37 137.75 8.062E+07 9. 2.311 279.46 5014.11 182.44 363.16 140.38 7.632E+07 10. 2.311 282.80 5024.23 192.81 369.47 138.83 8.178E+07 * * * END OF FILE * * * 4 SEC4Q.OPT 4/13/2020 XSTABL File: SEC4Q 4-13-20 10:25 ****************************************** * XSTABL * * * * Slope Stability Analysis * * using the * * Method of Slices * * * * Copyright (C) 1992 - 2002 * * Interactive Software Designs, Inc. * * Moscow, ID 83843, U.S.A. * * * * All Rights Reserved * * * * Ver. 5.206 96 - 1952 * ****************************************** Problem Description : WWTP South Side United Srchg Seismic SEGMENT BOUNDARY COORDINATES 6 SURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 .0 4897.0 173.0 4896.0 1 2 173.0 4896.0 176.0 4896.0 5 3 176.0 4896.0 200.0 4896.0 1 4 200.0 4896.0 215.0 4891.0 1 5 215.0 4891.0 332.0 4852.0 2 6 332.0 4852.0 450.0 4852.0 3 15 SUBSURFACE boundary segments Segment x-left y-left x-right y-right Soil Unit No. (ft) (ft) (ft) (ft) Below Segment 1 173.0 4896.0 173.1 4891.0 1 2 176.0 4896.0 176.1 4891.0 5 3 .0 4892.0 173.1 4891.0 2 4 176.1 4891.0 215.0 4891.0 2 5 173.1 4891.0 173.2 4852.0 2 6 176.1 4891.0 176.2 4852.0 5 7 .0 4853.0 173.2 4852.0 3 8 176.2 4852.0 332.0 4852.0 3 9 173.2 4852.0 173.3 4851.0 3 10 176.2 4852.0 176.3 4851.0 5 11 .0 4852.0 173.3 4851.0 4 12 176.3 4851.0 450.0 4851.0 4 13 173.3 4851.0 173.4 4848.0 4 14 176.3 4851.0 176.4 4848.0 5 15 173.4 4848.0 176.4 4848.0 4 1 SEC4Q.OPT 4/13/2020 ISOTROPIC Soil Parameters 5 Soil unit (s) specified Soil Unit Weight Cohesion Friction Pore Pressure Water Unit Moist Sat. Intercept Angle Parameter Constant Surface No. (pcf) (pcf) (psf) (deg) Ru (psf) No. 1 114.0 126.0 50.0 28.00 .000 .0 1 2 129.0 130.0 .0 35.00 .000 .0 1 3 110.0 133.0 50.0 28.00 .000 .0 1 4 126.0 135.0 100.0 29.00 .000 .0 1 5 112.0 115.0 .0 .00 .000 .0 1 1 Water surface(s) have been specified Unit weight of water = 62.40 (pcf) Water Surface No. 1 specified by 7 coordinate points ********************************** PHREATIC SURFACE, ********************************** Point x-water y-water No. (ft) (ft) 1 .00 4893.00 2 173.10 4893.00 3 176.50 4855.00 4 210.00 4854.00 5 230.00 4853.50 6 333.00 4853.00 7 450.00 4852.50 A horizontal earthquake loading coefficient of .091 has been assigned A vertical earthquake loading coefficient of .000 has been assigned BOUNDARY LOADS 1 load(s) specified Load x-left x-right Intensity Direction No. (ft) (ft) (psf) (deg) 1 55.0 75.0 3000.0 90.0 NOTE - Intensity is specified as a uniformly distributed 2 SEC4Q.OPT 4/13/2020 force acting on a HORIZONTALLY projected surface. A critical failure surface searching method, using a random technique for generating CIRCULAR surfaces has been specified. 400 trial surfaces will be generated and analyzed. 20 Surfaces initiate from each of 20 points equally spaced along the ground surface between x = 340.0 ft and x = 400.0 ft Each surface terminates between x = 130.0 ft and x = 144.0 ft Unless further limitations were imposed, the minimum elevation at which a surface extends is y = 4780.0 ft 7.0 ft line segments define each trial failure surface. ANGULAR RESTRICTIONS The first segment of each failure surface will be inclined within the angular range defined by : Lower angular limit := -45.0 degrees Upper angular limit := -5.0 degrees Factors of safety have been calculated by the : * * * * * SIMPLIFIED BISHOP METHOD * * * * * The most critical circular failure surface is specified by 42 coordinate points Point x-surf y-surf No. (ft) (ft) 1 387.37 4852.00 2 381.28 4848.55 3 375.07 4845.31 4 368.76 4842.29 5 362.34 4839.50 6 355.83 4836.92 7 349.24 4834 .57 8 342.56 4832.46 9 335.82 4830.57 3 SEC4Q.OPT 4/13/2020 10 329.02 4828. 92 11 322.16 4827.51 12 315.26 4826.33 13 308.33 4825.40 14 301.36 4824.70 15 294.37 4824.25 16 287.38 4824.04 17 280.38 4824.07 18 273.38 4824.34 19 266.40 4824.86 20 259.44 4825.62 21 252.52 4826.62 22 245.63 4827.85 23 238.78 4829.33 24 232.00 4831.04 25 225.27 4832. 99 26 218.62 4835.17 27 212.05 4837.58 28 205.56 4840.21 29 199.17 4843.07 30 192.88 4846.14 31 186.71 4849.44 32 180.65 4852.94 33 174.71 4856.65 34 168.91 4860.57 35 163.25 4864.69 36 157.73 4868.99 37 152.37 4873.49 38 147.16 4878.17 39 142.12 4883.03 40 137.25 4888.06 41 132.56 4893.25 42 130.04 4896.25 **** Simplified BISHOP FOS = 1.621 **** The following is a summary of the TEN most critical surfaces Problem Description : WWTP South Side United Srchg Seismic FOS Circle Center Radius Initial Terminal Resisting (BISHOP) x-coord y-coord x-coord x-coord Moment (ft) (ft) (ft) (ft) (ft) (ft-lb) 1. 1.621 284.88 5025.85 201.81 387.37 130.04 9.979E+07 2. 1.621 289.90 5039.32 214.15 393.68 130.74 1.041E+08 3. 1.622 285.94 5023.62 199.35 387.37 132.79 9.710E+07 4. 1.623 287.20 5022.89 201.35 393.68 130.56 1.042E+08 5. 1.625 290.16 5048.92 221.02 390.53 130.09 1.025E+08 6. 1.625 290.10 5020.37 194.45 387.37 140.26 8.931E+07 7. 1.625 279.82 5018.95 193.62 377.89 130.18 9.291E+07 8. 1.626 285.24 5016.47 190.34 381.05 137.74 8.765E+07 9. 1.626 290.71 5023.19 195.06 384.21 142.79 8.483E+07 10. 1.627 290.46 5030.06 201.23 384.21 140.38 8.735E+07 * * * END OF FILE * * * 4 GROUNDWATER MEMO Inouye Gravel Mine-City of Fort Lupton,WWTP-MLRB 112 Permit Amendment June 15,2020 Mr. Roy Vestal, P.E. Public Works Director/City Engineer City of Fort Lupton 130 South McKinley Avenue Fort Lupton, CO 80621 RE: Inouye Gravel Mine WWTP Amendment-Mitigation Plan for Potential Groundwater Impacts for Inouye Gravel Mine,City of Fort Lupton WWTP Permit Amendment Dear Mr.Vestal: The purpose of this memo is to describe the existing groundwater regime in the vicinity of the proposed Inouye Gravel Mine(Site)and the groundwater impacts that could result from soil-bentonite slurry wall lining and mining at the Mine. This memo takes into account both the original permitted area and the permit addendum to add the evaporation ponds north of the City Waste Water Treatment Plant(WWTP). The site can be accessed at 12210 Weld County Road(WCR) 14.5 and 12285 Highway 52 Fort Lupton,Colorado. More specifically,the site is within part of Section 31,Township 2 North, Range 66 West of the 6th Principal Meridian. Figure 1 is an existing conditions map of the site. Existing Groundwater Conditions The near surface groundwater is part of an alluvial aquifer in which permeable sand and gravel alluvium overlies relatively impermeable bedrock of the Laramie Formation and/or Denver/Arapahoe Formations. Groundwater measured in five site monitoring wells indicate groundwater typically occurs at depths ranging from approximately 5 to 9 feet blow existing ground. The prevailing groundwater flow direction at the Inouye Gravel Mine area is north-northeasterly roughly reflecting the site topography. Groundwater in the area is tributary to the South Platte River located east and northeast of the site. Locally the groundwater levels and flow directions are likely influenced by: > The South Platte River is east of the site. For most of the year,the river likely acts as a drainage way maintaining groundwater levels at elevations greater than water elevations in the river. In shorter periods of high run off, usually in the spring, river water levels will locally recharge the groundwater table. > The Lupton Bottom Ditch traverses the site from south to north. This ditch is west of the WWTP cell and is between the Inouye west and Inouye east cells. Where the ditch enters the Inouye site on the south,the ditch is raised relative to the surrounding land. In this south area,seepage from the ditch likely recharges the groundwater table. Progressing to the north,the elevation difference between the ditch and surrounding land becomes more subdued and the ditch may behave more like a drain maintaining groundwater elevations at or above the ditch water levels. > An unnamed drainage way is present on the west part of the Inouye site. This drainage enters the site in the southwest area and traverses the site in an east-northeasterly orientation before turning a more northerly direction and exiting the site on the north. This drainage likely maintains groundwater levels at or above the water levels in the drainage. This drainage will be relocated to the west and north boundary of the site. Page 2 Mr.Roy Vestal,P.E. April 9,2020 > A drainage ditch (oriented in a north-south direction)is present immediately west of the WWTP cell. This ditch turns to an east-west orientation between the WWTP and Inouye east cells eventually draining to the South Platte River. This drainage likely maintains groundwater levels at or above the ditch water levels. > Two off site ponds are located immediately adjacent to the mine Inouye property on the west side of the site. These ponds likely reflect groundwater levels in the area and appear to drain into an off-site drainage ditch located immediately west of the western mine boundary. ➢ Irrigation: The site is located in an area of irrigated pasture and cropland. Applied irrigation that is not lost to evaporation and transpiration likely recharges the groundwater. ➢ Alluvial Wells: Other than the five monitoring wells drilled at the site for monitoring groundwater levels,there are only two domestic wells permitted within 600 feet of the mine property. One of these wells is on-site at the former Inouye residence and is now owned by the property owner. The other well is located on the north side of WCR 14.5 in an area where a former farm house was demolished. This north well is reportedly ten feet deep and is owned by L.G. Everist. If pumping, groundwater will be drawn to the wells. Monthly groundwater level monitoring has been performed from January, 2018 to June, 2020 at the eight monitoring wells drilled at the site. Average groundwater elevations are presented in the following table: Wel Average Monthly Level(January,2018 to June,2020) MW1 (Inouye) 4881.81 MW2(Inouye) 4879.41 MW3(Inouye) 4882.28 MW4(Inouye) 4884.68 MW5(Inouye) 4885.73 MW-1 WWTP MW-2 WWTP 4886.13 MW-3 WWTP 4885.83 The groundwater levels above indicate the north-northeasterly flow of groundwater at the site. Mining Plan Four cells will be mined at the site. The Inouye west, Inouye east,and WWTP cells will be lined with slurry walls. The southwest cell will not be lined. The cells will be mined to bedrock that ranges from approximately 20 to 54 feet in borings drilled at the site. Potential Slurry Wall&Mining Impacts to Local Groundwater Levels At the Inouye west, Inouye east,and WWTP cells,a properly constructed slurry wall will tend to isolate these cells from the surrounding alluvial groundwater table.The slurry wall around these cells could cause "mounding"of groundwater(increase in groundwater elevation)on the upgradient side(south and southwest)of the proposed slurry wall and a potential"shadow effect"(reduction in groundwater level)on the downgradient side(north and northeast)of the Site. Because the slurry wall will tend to isolate these cells from the surrounding groundwater table,the effects of dewatering when mining the Inouye west, Inouye east,and WWTP cells will tend to not extend beyond the slurry walls. Page 3 Mr.Roy Vestal,P.E. April 9,2020 Any mounding effect on the upgradient side of the slurry wall lined cells is anticipated to be on the order of a few feet or less and will dissipate with distance from the mine. The mounding may affect the west part of the mine property in the form of higher water levels and increased flows in the west, relocated drain. Similarly,the mounding on the south side of the Inouye east cell may result in higher water levels that could surface in the ditch located between the Inouye east cell and the WWTP cell located to the south. Likewise mounding on the west side of the WWTP cell could surface in the drainage ditch to the west. Shadowing affects will be minimized by the presence of the South Platte River on the east and northeast,the Lupton Bottom Ditch between the cells,and the relocated drainage on the north site boundary. Dewatering of the unlined southwest cell will result in decreases in water levels around this cell. No wells are permitted within 600 feet of this cell. Area Wells and Sub-Surface Structures A review of permitted wells on file at the State engineer's Office(SEO), Division of Water Resources(DWR) indicates there are two permitted domestic wells within 600 feet of the permit boundary(not including the 5 monitoring wells). Both of these wells are screened in the alluvium. As mentioned above,the land owner owns the well that was formerly the Inouye domestic well. The other well, owned by L.G. Everist, is located north of WCR 14.5 on the northwest part of the mine(cross gradient of the mine). This well is 10 feet deep and is in the area of a demolished farm house. Review of the Weld County Tax Assessor files indicates there is only one sub-surface structure within 600 feet of the mine. This is the basement associated with the Inouye farm house now owned by the property owner. Mitigation Plan The site mining and reclamation activities are unlikely to adversely affect the two permitted area wells located within 600 feet of the mine. The former lnoyue well is owned by the property owner. The L.G. Everist well is cross gradient of the site and will likely be recharged from the relocated ditch to be constructed on the west and north side of the site. However, if the miner receives a complaint,the following mitigation plan will be implemented. The site monitor wells will be measured monthly to identify potential changes in alluvial groundwater flow or elevation associated with mining and reclamation activities. Baseline data collected from the monitoring program will provide a range of relative water levels associated with premining groundwater conditions. Experience at other mines in similar geologic settings has found that groundwater levels tend to fluctuate being highest in the summer irrigation season and lowest in the winter and early spring. If,during mining or reclamation,the relative seasonal groundwater elevation at any monitoring wells differs from baseline conditions by more than 2 feet,and the condition was not observed during baseline monitoring,or if the miner receives a complaint from any well owner within 600 feet of the site boundary, then the miner will evaluate the cause and take action within 30 days and notify the DRMS. After the DRMS has been notified,the miner will review the data and available information and submit a report to the DRMS within 30 days. The evaluation will include discussions with the well owner who has contacted the miner regarding a concern and review of baseline data from the well and vicinity to evaluate whether changes may be due to seasonal variations,climate, mining,slurry wall lining or other factors. The report will identify the extent of potential or actual impacts associated with the changes. If the extent of groundwater changes due to mining or reclamation activities is determined to be a significant contributing Page 4 Mr.Roy Vestal,P.E. April 9,2020 factor that has or may create adverse impacts,the mining associated impacts will be addressed to the satisfaction of the DRMS. Miner will begin implementing one or more mitigation measures if mining and reclamation activity is determined to be a significant factor to groundwater changes requiring mitigation. Mitigation measures may include, but are not limited to: Placing water in a recharge pond to raise groundwater levels around the well. Cleaning the well to improve efficiency. Providing an alternative source of water or purchasing additional water to support historic well use in terms of water quantity and quality. If needed,water quality parameters will be checked in affected wells to ensure alternative sources support historic use. Modifying a well to operate under lower groundwater conditions.This could include deepening the well or lowering pumps. All work would be done at the miner's expense with the exception of replacing equipment that was non-functional prior to mining. It existing wells cannot be retrofitted or repaired, replacing the impacted well. Please call if you have any questions. Sincerely, CIVIL RESOURCES, LLC Gary Linden, P.G. J:1ft Iupton\WWTPIDRMS\groundwater-memoWWTPInouye.doc INOUVE MINE GROUNDWATER MONITORING PROGRAM Piemmeterinformalion and Water Levels Coordinates ID Date Drilled Depth to Bedrock Screened Interval Northing 3014 Ground El,N Top PVC El,fl P operty MW1(Inouye) 12/181017 23 10 1278217.7 ----3187575.5 408011 4803.71" nouye N7W2(Inouye) 12/13/2017 44 70 12783024 31899502 4887.78 4890.78 _ nouye M613(Inouye) 12/13017 23 10 1277068.9 318395 4888.19 4891.19 I0ye N1W4(Inouye) 12/132017 46 10 1277098.8 3190457.2 488763 4893.63 nose MW5(Inouye) 12/132017 33 10 1275768.0 3187398.1 4890.47 4893.47 nouye MWt(WWTP) 1275154.3 3190362.2 4895.00 489880 VIWTP MW2(WW1P) 1276352.6 3189834.9 4895.73 4898.73 MEW MW3(WWTP) 127636/8 31910513 4895.89 4899.69 WWTP De VI from To of PVC,feet Groundwater Level Date Measured 1(12018 897 11.91 900 8.50 8,91 P) ;MWd ., 4890.80 :`A' 8848788lYy/}'-`. ti`s M'W7 881119veZ,..; $`t 30}„1 yJ 3 41UY819w`.hfiV1:lWWT$)�`₹61ARIWWIP).MW3(1NWPP) 16 21112018 883 11.91 933 7.83 691 488068 487887 4881.63 4882.80 4884.56 311/2018 883 1200 933 7.91 8,91 488068 4878.78 4881,86 488272 4864.86 482018 883 1200 9.33 7.91 980 4880.88 4878.78 4881.86 48B212 4884.47 611/2010 891 11.91 9.25 800 891 488080 487887 488194 4862.63 4884.'..6 6/1/21118 891 1191 925 800 891 _ 488000 4878.87 4681.94 488263 4884E 78/2018 833 1125 819 700 7.67 4881.38 4879.53 108303 488{63 483580 811/2119 9812016 10/1/2018 6.50 11.83 883 050 7.68 488321 4878.95 4882.36 4882.13 4885.89 11/1/2018 8.60 11.50 9.00 7,50 8.00 4881.21 4879,28 4882.19 4883.13 4885.47 1211/2019 8.91 1793 9.00 7.60 850 488083 487895 4882.19 4883.13 4884.97 1/31/2019 900 12.00 825 800 000 4860.71 487878 488294 488263 4884.47 2/1/2019 9 11.92 9.42 8 8,16 4860:71 487886 4881.77 4882.63 4885,31 3/2/2019 875 71.83 9.16 7,83 9.08 488098 4878.95 4882.03 4882.80 488439 49/2019 9 1191 9.42 8 8.16 4881.78 4873.28 488127 4086.47 4885.31 58/2019 883 11.83 933 7.91 642 455195 4879.36 488130 4885.5£ 465.E 6112019 625 175 7.75 5.58 603 4884.53 4881.44 4882.89 4887.89 488664 771/2019 7.91 1025 7.75 575 65 463287 4880.94 4882,88 4887.72 4686.97 871/2019 7.58 11.08 8 6.16 641 463320 488011 4892.63 488731 4887.08 9/112019 8.75 11.75 816 625 6.58 488203 4879.443 4882.467 4887219 4086.89 10/1/2019 8 1116 8 6.97 6.42 468578 4880.033 4881627 4886.559 4887.01 1151/2019 825 11.83 816 7.08 6.42 488253 4879.363 4882.467 4886.363 4887.05 12/1/2019 85 11.92 85 7 883 488228 4879273 4882,377 4886:469 488664 11212020 8,75 11.58 825 7.18 692 _ 489203 4879.613 4882.377 4886.309 488655 2/212020 6,057 1792 033 708 7 4882.113 4879.273 4882.297 4886.389 4886.47 3112020 8.16 17.16 776 7 6.5 488262 4880.033 4862.877 4086.469 4866.97 4812020 833 11.083 7.833 7.083 6.75 488245 4880.11 4882.794 4886.385 4886.72 5/82020 125 14.3 4886.03 488443 662020 127 115 4886.01 4667.23 SPILLWAY DESIGN Bestway Concrete&Aggregates—Lupton Meadow Gravel Mine—MLRB 112 Permit Amendment Application CIVIL RES'AURCES, LLC ENGINEERS & PLANNERS TECHNICAL MEMORANDUM WWTP Amendment- Spillway Design TO: DRMS-Inouye Gravel Mine—WWTPI Amendment AM01 FROM: Civil Resources, LLC DATE: June 9, 2020 RE: Spillway Design This memorandum discusses the proposed spillway designs at the Ft. Lupton Waste Water Treatment Plant (WWTP) Amendment to the Inouye Gravel Mine. The WWTP reclaimed reservoir is located in the floodplain and will require a spillway. Using floodplain mapping from the Flood Insurance Rate Map indicates the reservoirs will be fully submerged during the 100- year flood conditions. Subsequently, the inflow spillways proposed were primarily placed near the east side of the pit and adjacent to the river. The capacity for the spillways is discussed below.The inflow spillways will be protected with riprap in order to deliver flood water in a controlled manner into the respective reservoirs. > A typical 100-year storm in the Front Range is 3-inches of rainfall in one hour. During a storm event the major contributing factors to runoff are travel time, location of the storm and ground cover conditions. Civil Resources performed further floodplain modeling and hydrologic analysis on the South Platte River and determined the rate of rise during a flood event is six-inches per hour rise in flood water at the site. The results are presented in the attached tables using the spillway equation: Q=CLH15to determine the flow rate over the spillway. ➢ The spillway was set on the upstream end (south) approximately two-foot lower than the existing ground surface elevation of 4892(existing ground elevation-4894). ➢ The reservoir is approximately 841 acre-feet in volume and the spillway has 375 cubic feet per second (cfs)capacity at 1-foot of overtopping depth. The spillway was designed to be able to fill the reservoir so the banks are less susceptible to major washouts. A six-inch per hour rise in flood water would fill the reservoir in less than 8-hours. At which time the base flood elevation is overtopping the entire pond at 4-hours and the pond is 9-feet full. > The reservoir was also equipped with a discharge spillway at the downstream(north)end. The discharge spillway will help direct flow as flood waters recede and limit erosion to localized areas. The outflow spillway will potentially serve as an inflow point in conjunction with the upstream spillway depending on how the flood waters rise in the vicinity of these pits. This north spillway was set at elevation 4892. > The spillway terminus and rundown is designed with riprap and pyramat. The initial rundown spillway should be keyed into the bedrock with a 1-foot plunge pool (a detail sheet showing the final design is attached). Further protection including toe riprap along the east slopes and river stabilization might be necessary as the mine is close to the west bank of the South Platte River. It should be noted that the 100-year base flood elevations (el. 4593—4594) are not higher than the historic perimeter berm (el. 4894) surrounding the WWTP Site as FEMA does not typically include levees in detailed studies. Conclusion The analysis was completed based on general hydraulic characteristics of the South Platte as a flooding source. The pattern of storms is largely unpredictable and therefore the recommended improvements cannot guarantee that the facilities will not be damaged during large-scale storm events. J:1ft.lupton1WWTPIDRMS1Exhibitslspillway-6-9-2020.docx 323 FIFTH STREET• FREDERICK, COLORADO 80530 • PHONE: 303.833. 1416 • FAX: 303.833.2850 WWTP Volume 1,.,, ', 841 J ac ft Fill Time(1 per hour) Fill Time(2 per hour) Fill Time(3 per hour) Fill Time(6 per hour) notes D.) (ao-rq V.-ft) Dc-al fro0 0 0 0 0 0 1 1 2 4 11 2 3 8 11 42 3 7 19 20 99 4 13 36 31 L., - 187 ,- 3 9footdepth overbanks flooded 5 21 60 43 309 6 32 91 57 470 � ) -hall full 7 46 130 72 673 8 63 178 88 921 C L U/S Invert D/S Invert Is) _ let 01) let v)) i` 25 150 4892 ,, 4892≥ hr H 1 H 21+3 1-16 0-1 Q1 Q 2 Q 2 Q 3 Q 3 Q 6 0-6 all (ft) (N IC) (d s) (Me) (ds) (eo-nmo) Ids) Do-Mr) (ds) lacnm4 0 00 00 00 00 0 0 0 0 0 0 0 0 1 01 02 03 05 9 1 26 2 47 4 133 11 2 0 2 0 3 05 1 0 26 2 72 6 133 11 375 31 3 0 2 05 08 15 47 4 133 11 244 20 689 57 4 0 3 07 1 0 20 72 6 205 17 375 31 1061 88 5 04 08 1 3 25 101 8 286 24 524 43 1482 123 6 05 1 0 1 5 30 133 11 376 31 689 57 1 949 161 7 0 6 1 2 1 8 3 5 167 14 474 39 868 72 2 455 203 8 0 7 1 3 20 40 204 17 579 48 1061 88 3 000 248 9 0 7 15 23 45 243 20 691 57 1266 105 3 580 296 10 0 8 17 25 50 285 24 809 67 1482 123 4193 347 11 0 9 18 28 55 329 27 934 77 1710 141 4 837 400 12 1 0 20 3 0 60 375 31 1064 88 1949 161 5 511 455 13 1 1 22 3 3 65 423 35 1200 99 2197 182 6 214 514 14 1 2 23 3 5 70 472 39 1341 111 2 455 203 6 945 574 15 1 2 2 5 38 7 5 524 43 1487 123 2 723 225 7 702 637 16 1 3 27 40 80 577 48 1,638 135 3 000 248 8 485 701 17 14 28 43 85 632 52 1794 148 3 286 272 9 293 768 18 1 5 30 45 90 689 57 1954 162 3 580 296 10125 837 Rock_Chute xis Page 1 of 3 Rock Chun-p 'Design Dat;, (Version WI-July-2010, Based on Design of Rock Chutes by Robinson, Rice, Kadavy,ASAE, 1998) Project WWTP Spillway County weld Designer civil resources Checked by Date June 11, 2020 Date ' Input Geometry Upstream Channel Chute Downstream Channel Bw= 100 Oft Bw= 100 Oft Bw= 100 Oft Side slopes= 6 0 (m 1) Factor of safety= 1 20 (F5) 1.2 Min Side slopes= 20 0(m 1) Velocity n-value= 0 035 Side slopes= 100 On 1) —2 0 1 max Velocity n-value= 0 035 Bed slope= 0 0010 ft/ft Bed slope (3 1)= 0 333 ft/ft 3 0-1 max Bed slope= 0 0100 ft/ft Note n value=a)velocity n from waterway program Freeboard= 0 0 ft 'Increase Freeboard orb)computed mannings n for channel Outlet apron depth, d= 1 0 ft Base flow= 0 0 cfs Design Storm Data (Table 2, FOTG,III-MRCS Grade Stabilization Structure No 410) Apron elev ---Inlet=4892 0 ft Outlett850 0 ft --- (Hdrop= 41 ft) Note The total required capacity is routed through the chute(principal spillway)or Q nigh =Runoff from design storm capacity from Table 2,FOTG Standard 410 in combination with an auxiliary spillway Q 5 =Runoff from a 5-year,24-hour storm Input tadwater(Tw) °high= 350 0 cfs High flow storm through chute > Tw(ft)= 0 00 O5= 350 0 cfs Low flow storm through chute ' Tw(ft)= 0 00 Profile and Cross Section Out ut Starting Station= 0+00 0 Notes hp„= 0 19 ft (0 19 ft) 1)Output given as High Flow(Low Flow) values Hpe= 1 14 ft tic,= 0 22 ft (0 22 ft) 2)Tailwater depth plus d must be at or above the Energy_Grade Line HCe= 0 81 ft z hydraulic jump height for the chute to function -- _____ __ - — 3)Critical depth occurs 2yc-4yc upstream of crest 0 715yc= 0 42 ft 4)Use WI Const Spec 13,Class I non-woven _ Hp= 0 95 ft ' ________ " �(0 42 ft) geotextile under rock ` Inlet (0 95 ft) yc= 059ft tea'- -. zt = 033ft Hydraulic Jump 7 Channel 1 y (0 59 ft) _ Sl (0 33 ft) Height,z2= 0 94 ft (0 94 ft) ope=0 001 ft/ft Inlet A ron 1 Yn= 1 73 ft ___10y.= 6 ft -'-I- \ Tw+d= 1 ft -Two k (1 73 ft) N Hdrop= 41 ft - (1 ft)-Twok ' 40(D50)=22 ft " 0 — Velocity,niet= 1 83 fps radius �S3 `�.� 0 ft (Oft) Outlet at normal depth °S3 r 2 5 Channel ' Critical Slope check upstream is OK Geotext I 1 1 F4 Slope=0 01,ft/ft I Mote When the normal depth(ye)in the inlet 3 Outlet Apron .•t',. A channel is less than the weir head(Hr),ie,the weir capacity is less r -- 10 ft ` d= 1 ft (1 ft minimum' than the channel capacity, restricted flow or ponding will occur This �`` 4 15 D F) suggested] + Rock Chute ( so)( 5 reduces velocity and prevents erosion upstream of the inlet apron Bedding Velocityo„net= #DIV/01 at normal depth ' Profile Alone Centerline of Chute ' Typical Cross Section 2 58 cfs/ft Equivalent unit discharge Freeboard= 0 ft Fs= 1 20 Factor of safety(multiplier) , ' Berm z1 = 0 33 ft Normal depth in chute `. ��. Geotextile n-value= 0 053 Manning's roughness coefficient ; H* ,' Dso(F5)= 7 8 in Minimum Design D50* 1 �' a •�''' Rock Chute 2(Dso)(F5)= 15 7 in Rock chute thickness ��r�'�:�• � ,' Bedding m= 100 Ita � �i�s.�i; g Tw+d= 1 ft Tailwater above outlet apron 100 ft---1 ' Rock thickness= 15 7 in z2= 0 94 ft Hydraulic jump height ' Use Hong chute �. ***The outlet will function adequately but nott less than z2 B' � High Flow Storm Information • Rock_Chute xls• for construction plan Rock Chute Design - Cut/Paste Plan (Version WI-July-2010, Based on Design of Rock Chutes by Robinson, Rice, Kadavy,ASAE, 1998) Project WWTP Spillway County weld Designer. civil resources Checked by Date: 6/11/2020 Date Design Values Rock Gradation Envelope Quantities a D50 dia = 8 0 in %Passing Diameter,in (weight,lbs) Rock= 3254 Yd3 Rockt,„to thickness= 16 0 in D100 12-16 (122-290) Geotextile(WCS-13)6 = 9614 Yd2 Inlet apron length= 10 ft D85 10-14 (80-211) Bedding= 0 yd3 Outlet apron length= 10 ft D50 - 8- 12(36-122) Excavation= 0 Yd3 Radius= 22 ft D10 - 6- 10(19-80) Earthfill= 0 Yd3 Will bedding be used' No Coefficient of Uniformity, (D60)/(D io)< 1 7 Seeding= 0 0 acres Notes a Rock, bedding,and geotextile quantities are determined from x-section below(neglect radius) b Geotextile Class I(Non-woven)shall be overlapped and anchored(18-in minimum along sides ' and 24-in minimum on the ends)-- quantity not included Upstream o Channel m Inlet apron elev = 4892 ft Point No Description I I2 3 2 Point of curvature(PC) Slope=0 001 ft/ft •�a•;•:r. �' 4 Rock�.�.��`�Inlet apron�;,,r• thickness= 16 in 3 Point of intersection (PI) --10 ft------,��•� 4 Point of tangency(PT) �•�. Stakeout Notes \., ia , • Sta Elev (Pnt) . 0+00 0 4892 ft (1) Radius= 22 24 s •,��• Outlet apron 0+06 4 4892 ft (2) ei�� elev = 4850 ft[ Downstream , 0+10 0 4891 7 ft (3) Geotextile A 7 Channel ` 0+13 4 4890 9 ft (4) 1 �� :s • • Slope=0 01 ft/ft 1+361 4850 ft (5) 3 s.�S Outlet apron 1+461 4850 ft (6) 126 ft '-t-- 10 ft ----1-51 ` d= 1 ft ` at 1+48 6 4851 ft (7) Profile Along Centerline of Rock Chute Rock Chute Bedding ,Top width =290 ft 1 Berm Geotextile 'I �•i' Freeboard = 0 ft I��-�� 1 b *y= 0 95 ft -'/� Rock Chute Notes 10d�� -�:•• r•�:��/ Bedding Rock gradation envelope can be met with ' , DOT Medium nprap Gradation I` 100 ft _ Rock thickness= 16 in B'=100 ft *Use Hp throughout chute but not less than z2 , Rock Chute Cross Section Profile, Cross Sections, and Quantities 4 NJ RC S I WW Date Fie Name ce fP Spillway Designed ovAremos Drawn Drawing Name Natural Remotes Conser abon Same Doted States Deparhnent ofAg¢Wtoe weld County Checked Sheet_of_ ed Hello