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Home My WebLink About911339.tiff RESOLUTION RE: ACTION OF BOARD CONCERNING SHOW CAUSE HEARING - PERMAGREEN, C/O ROXY F. VENDENA WHEREAS, the Board of County Commissioners of Weld County, Colorado, pursuant to Colorado statute and the Weld County Home Rule Charter, is vested with the authority of administering the affairs of Weld County, Colorado, and WHEREAS, on September 25, 1991, a Show Cause Hearing was conducted to consider revocation of Special Use Permit 0654, issued to Permagreen, c/o Roxy F. Vendena, and WHEREAS, at the meeting of September 25, 1991, the Board deemed it advisable to continue said matter to November 6, 1991, at 10:00 a.m. , and WHEREAS, Roxy F. Vendena is the President of Permagreen, said facility being located on property described as part of the NE'-, of Section 24, Township 1 North, Range 68 West of the 6th P.M. , Weld County, Colorado, and WHEREAS, at the meeting of November 4, 1991, Mr. Vendena and Kurt Rollin, Engineer from Rocky Mountain Consultants, were present, and WHEREAS, the Department of Planning Services informed the Board that Mr. Vendena is in compliance with Special Use Permit 0654, and said matter should be dismissed, and WHEREAS, the Board deemed it advisable to dismiss said Show Cause Hearing for Permagreen, c/o Roxy F. Vendena. NOW, THEREFORE, BE IT RESOLVED by the Board of County Commissioners of Weld County, Colorado, that the Show Cause Hearing to consider the revocation of Special Use Permit 0654 issued to Permagreen, c/o Roxy F. Vendena, be, and hereby is, dismissed. PL0846 911339 pl,, Hit / APP i R CA)In lir 5 Page 2 RE: DISMISS SHOW CAUSE - PERMAGREEN, C/0 VENDENA The above and foregoing Resolution was, on motion duly made and seconded, adopted by the followin vote on the 6th day of November, A.D. , 1991. ATTEST BOARD OF COUNTY COMMISSIONERS WELD COUNTY, COLORADO Weld County Clerk to the Board EXCUSED � L // /J Gordon E. Lacy, Chairman/%4K By: CLI Deputy clerk to the Bo Geoorr a Kennety, Pro-Tem I cJi APPROVED AS TO FORM: /2 J Constance L. Harbert ` / t-M\ v ) /7/1( -7 EXCUSED DATE OF SIGNING `County Attorney C. W. Kirby � � e? 177 1 10444-2,t W. H. Webste 911339 HEARING CERTIFICATION DOCKET N0. 91-52 RE: SHOW CAUSE HEARING TO CONSIDER REVOCATION OF SPECIAL USE PERMIT 11654 - PERMAGREEN, C/O ROXY F. VENDENA A public hearing was conducted on November 6, 1991, at 10:00 A.M. , with the following present: Commissioner Gordon E. Lacy, Chairman - Excused Commissioner George Kennedy, Pro-Tem Commissioner Constance L. Harbert Commissioner C. W. Kirby Commissioner W. H. Webster Also present: Acting Clerk to the Board, Shelly Miller Assistant County Attorney, Jan Allison Planning Department representative, Keith Schuett The following business was transacted: I hereby certify that pursuant to a notice, dated August 28, 1991, and duly published September 12, 1991, in The New News, a public hearing was conducted on September 25, 1991, to consider the revocation of Special Use Permit 17654 issued to Permagreen, c/o Roxy F. Vendena. At said hearing of September 25, the matter was continued to November 6, 1991, at which time Jan Allison, Assistant County Attorney, made this a matter of record. Keith Schuett, Planning Department representative, said the Health and Planning staffs have inspected the facility, and all issues have been brought into compliance; therefore, he recommended closing the violations. Roxy Vendena, President of Permagreen, was present. Commissioner Harbert moved to dismiss the Show Cause hearing to consider the revocation of Special Use Permit 11654 issued to Permagreen, c/o Roxy F. Vendena. Commissioner Webster seconded the motion, which carried unanimously. This Certification was approved on the 13th day of November, 1991. APPROVED: ATTEST:1Ukatieh BOARD OF COUNTY COMMISSIONERS WELD COUNTY, COLORADO Weld County Clerk 7,,,:_]:e Board EXCUSED By: AA .-46, /, �—� — Gordon E. Lacy, Chairman Deputy Clerk to the Boar (/� `�---�--q�/ visa-. c_-ciZcA. G'eeo,/�,8_e_Kennt�dy, Pro-Tem c! TAPE 1191-32 c .etttelJ d�t.�i Co nstance L. Harbert DOCKET 7191-52 EXCUSED DATE OF APPROVAL C. W. Kirby , PL0846 t ed i0/ W. H. Webster 911339 ctct 1 131 ATTENDANCE RECORD HEARINGS ARE AS FOLLOWS ON THIS 6th DAY OF November , 1993: DOCKET # 91-52 - Permagreen, c/o Roxy Vendena - Show Cause Hearing DOCKET # 91-56 - Colorado Engineering Experiment Station, Inc. - USR DOCKET # DOCKET # DOCKET # PLEASE write or print your name legibly, your address and the DOC # (as listed above) or the name of the applicant of the hearing you are attending. . NAME ADDRESS HEARING ATTENDING Sri 4� CA/LC 11 s—Val) Cr*4.?7 s/-5-6 �1 f ct‘p MEMORAnDum Keith Scheutt Department To of of Planning Service Date October 1 19Q /141 COLORADO From Wes Potter. Director. Environmental Protection .Servir es subwct: Permagreen - Inspection for Compliance On October 18, 1991, staff of the Environmental Protection Division conducted an inspection of the permagreen composting facility at the north quarter of Section 24, Township 01 North, Range 65 West, south of Dacono, Colorado. This inspection was conducted to evaluate construction completed pursuant to show cause action initiated by Weld County for violations of the Special Use Permit. Permagreen has completed an extensive stormwater retention facility at the composting site to control stormwater run-off. This construction will control stormwater that occurs on the site and will also route off-site flows through the composting facility so that it is not contaminated by the compost material. The staff finds that the construction is completed and the facility is constructed as proposed. All berms, dikes, impoundments, ponds, and run-off areas have been completed in a satisfactory manner. The flow-through stormwater diversion is constructed as proposed and appears adequate to handle the flow through as proposed. With the completion of this construction the staff finds the Permagreen composting facility to be substantially in-compliance with the development standards of the Special Use Permit. cs al I'1 I to 1991 ,, 2 Weld County planning .'..f,.`311 ee- , ��e_ /- i .. _five _ TO t .'._ .- September 30 , 1991 oEC I7 \\ Mr . Keith Schuett ACT 0 3 1991 Weld County Planning Department 915 10th St . Weld Conti Ph Mffi all Greeley, Colorado 80631 Dear Mr . Schuett : I am writing this letter in response to the complaints outlined in our "Show and Cause" hearing on September 25 , 1991 . I hope this reply will be helpful to you in reviewing our case and making recommendations to the Board of Commissioners . Operation Standard #4 - The design that we submitted on September 25th for your approval is the plan that would be implemented with one exception - the culvert system that was designed for us to have access to areas B and C would prove to be dangerous for our composting ma- chinery to cross over . We would like to eliminate this culvert system entirely and leave the swale com- pletely open . At this time , we would also like to request another driveway that would enter into areas B and C from Weld County Road 13 so that we can bring our composting machinery into that area in a more effi- cient and safe manner . Depending on weather conditions , this project will be completed and ready for your inspec- tion on or before November 1st . Operation Standard #5 - With the ponding and berm design laid out in our plan , the area should be more than adequate for a 100-year event . Operation Standard #6 - Observing the height of the weeds adjacent to us , including weeds in the ditches , we felt thatthis might be a requirement that , generally speaking , didn ' t affect anyone . Now that it has been pointed out to us that we are in violation, we will make every effort to see that the weeds will not exceed 12 inches in height (we are notifying the City of Dacono , that the weeds in the adjacent ditches be taken care of in the same manner) . 01 rir-t 5520 Harlan Arvada,CO 80002 (303)424-9376 FAX(303)422-1432 "' Mr . Keith Schuett Page 2 Operation Standard #7 - The Weld County Planning Depart- ment and/or Weld County Department has never been denied access to our site . Operation Standard #8 - All materials have been removed from the South property line. New materials brought into the area will always be kept within boundaries . The effluent that is accumulated in the ponds during a rain- fall runoff event , will be pumped from the accumulating ponds by a gas-driven pump . The accumulator from the pump will be submerged into the water . The effluent will then be broad- casted back into the compost . Mr . Schuett , we have been doing business on this particu- lar property since 1984 with little or no complaints . We have tried to be a good neighbor by being sensitive to our neigh- bors ' concerns , whether real or unfounded . If you have any questions regarding this matter , please feel free to contact me . Regards , �7 y-� � — Rory F . Vendena President cc : 1 . Wes Potter , Director Environmental Protection Service 2 . Joe Sedlak, Esc, . Attorney at Law 3 . Kurt Rollin P . E . Rocky Mtn. Consultants 011ned �i r, October 1 , 1991 City of Dacono Public Works Department PO Box 186 Dacono , Colorado 80514 Attn : Jack Van Matre Gentlemen: Permagreen Products Co . under our Special Use Permit from Weld county is required to maintain weed height below 12 inches on our composting site . To be able to have a uniform consistency , we would be grateful if the City of Dacono would maintain a weed level below 12 inches in the ditches , along Road 13 and 8 which was recently annexed by your city . Also , in observing the adjacent annexed property, we have noticed extensive areas of very tall weed growth . If you have an ordinance addressing that problem, we would certainly appreciate it if enforcement was carried out . Secondly, we would like to see the ditches cut deeper North to South and East to West to more favorably accommodate some of the larger rain storms . Thanking you in advance for your consideration of this ma er . I am s cerely , C --t—, Roxy F . Vendena President cc : "-Mr . Keith Schuett Weld County Planning 5520 Harlan Arvada,CO 80002 (303)424-9376 FAX(303)422-1432 SHOW CAUSE DATE: September 25, 1991 CASE #: ZCH-75 USR #: 654 NAME: Permagreen Roxy F. Vendena ADDRESS: 5520 Harlan Arvada, CO 80002 LEGAL DESCRIPTION: Part of the NE4 of Section 24, T1N, R68W of the 6th P.M. , Weld County, Colorado. It is the opinion of the Department of Planning Services staff, that the following Standards as approved for USR / 654 are not in compliance: The property is not in compliance with Operation Standards 4, 5 , 6, 7 , 8 , and 9 . Operation Standard #4 states: The applicant and/or operator shall implement a runoff containment program for the Use by Special Review are as approved by the Department of Planning Services . The property is not in compliance with runoff containment. The design and materials of the new berms appear to be inadequate to contain runoff. An engineered runoff containment plan is needed. Operation Standard #5 states: The applicant shall comply with the design standards for the Use by Special Review, Section 24. 5 et seq. , of the Weld County Zoning Ordinance. 24. 5 . 1.5.1 Storm water retention facilities shall be provided on site which are designed to retain the storm water runoff from the fully developed site from a 100 year storm. No engineered storm water retention facilities exist to retain storm water runoff. ell �� T� Show Cause - ZCH #654 Roxy F. Vendena Page 2 Operation Standard #6 states: The applicant shall comply with the Operation Standards for Uses by Special Review, Section 24.6 et seq. , of the Weld County Zoning Ordinance. 24.6.1.6 Property shall be maintained in such a manner that grasses and weeds are not permitted to grow taller than twelve (12) inches. In no event shall the property owner allow the growth of NOXIOUS WEEDS. Grasses and weeds on the property exceed 12 inches in height along the perimeter of the Special Review permit site. Operation Standard #7 states : Representatives or members of the Weld County Health Department and Weld County Department of Planning Services shall be granted access onto the site at any reasonable time in order to insure the operations carried out on the site comply with the Development Standards stated hereon and all applicable Weld County Regulations . The property is not in compliance with the Weld County Health Department Standards. (See Health Department Notice of Violation dated June 20, 1991) . Operation Standard #8 states: The Use by Special Review shall be limited to the plans shown hereon and governed by the Standards as stated above and all applicable Weld County Regulations. Any material deviations from the plans and/or Standards as shown or stated above shall require the approval of an amendment of the Permit by the Weld County Planning Commission and the Board of County Commissioners before such changes from the plans and/or Standards are permitted. Any other changes shall be filed in the office of the Department of Planning Services . The Operation has expanded onto the adjacent property to the south and the property is not in compliance with Operation Standards 2, 4, 5 , 6 , 7 , and 9 , as approved and no amendments to the Operation Standards have been made. Operation Standard #9 states: The property owner and/or operator of this operation shall be responsible for complying with all of the above stated standards. Noncompliance with any of the above stated Standards may be reason for revocation of the Permit by the Board of County Commissioners. (.41 g fm ! ROCKY MOUNTAIN CONSULTANTS, INC. RMC 1960 Industrial Circle Suite A Longmont,CO 80501 (303) 772-5282 Metro(303)665-6283 September 24, 1991 FAX(303)665 6959 Mr. Drew Sheltinga County Engineer 915 Tenth Street Greeley, CO 80631 RE: Storm Water Retention Plan and Routing of Off-site Flows Through Composting Site at Southwest Corner of Weld County Roads 13 and 8, Weld County, Colorado Dear Mr. Scheltinga: Rocky Mountain Consultants, Inc. has been retained by Permagreen Products Company to develop a drainage plan to retain the on-site storm runoff flows, and to route the existing off-site runoff flows through their composting site located in the Northeast 1/4 of Section 24, Township 1 North, Range 68 West of the 6th Principal Meridian, Weld County, Colorado. More specifically, the site is located at the southwest corner of Weld County Roads 13 and 8. The site is now being used by Permagreen in developing their compost materials. The site contains 21.3 acres more or less. At this time, Weld County Planning Department has requested that Permagreen develop a storm water retention plan for the site's on-site storm runoff waters. This plan is being submitted for your review. The retention of on- site storm flows is part of the special use requirements of this site. All of the storm water retention facilities have been designed to retain the 100 year storm water runoff from the site. Calculations of these flows, along with pond sizing, and a plan showing the pond locations are included for your review. Also as part of this plan, the existing off site runoff that is generated east of the site will be routed through or around the site, and will be protected from the composting materials on the site. The amounts of this off site flow, and the details of the drainage swales are included for your review. If you have any questions or comments, please feel free to contact me. Sincerely, ROCKY NTN CpN$ULTANTS, INC. r► t R v� /l'Vl/J • EXHIBIT Ku Rollin, P.E. n dt A\DREW.LTR\1.2 r' '-! —7S CIVIL AND ENVIRONMENTAL ENGINEERING • PLANNING 911 e?"141 RIM ROCKY MOL_- FAIN CONSULTANTS, INC. p��f *Professional Engineers* CLIENT: ragM46 €6.4-4 JOB NO /,.: za-ISSDOI.ODSHEET_�OF 1O DESCRIPTION: VAA-c.J�ja'“... CAcu tm-1JAsS DESIGNED BY: P— DATE: Q_6'1'11 qt 5512-4- W G Ro O 3 CHECKED BY: DATE: C-(:- lei UA) lic-T ^IS CASV) 014 3JCACL1L Cou-vrAt Dr14S. A•C‘rz.. CA.-terku/i- AQ7 U O-P4-J SN RAA 7A01-14•JA-S'_, -- ------ •L1`ti� +h' - -- -- - _ » 04445 - d�/�Ne- 570^9, — /00 yrvi-2 _VS'z R.4-r te— /14.Mt-1-00 _-TO _ 7�zrnnE._ fr-44 Q - . rum. -(col C.�,.., SN . Ast Dm.cim ,M2.Jc,Nna2. Pet/A-s — 1756: (,4waS I amt tAi Sou_ --05 L. -o to -... t ___.C 'Los_0 Io _- r ✓1 - -- --._. it n ant og- t'St- F-O. 603 gL50G/v1 (PAzA.. 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FJ' /14*-1(V'�� ^' JOB NO.: 4o"1.556.0)I.DO SHEET l OF 1O DESCRIPTION: AM-0�� C� lfAiLA-11-44S DESIGNED BY: `v2-' DATE: 9iztlI`1' Ll�i e W z_ I)• B71 13 CHECKED BY: DATE: ....- .. . .. -. 13P►• r..3 oS (c- a=_) IlkiN)fA- CLA•JLTBhs _,.Q " as cem- - go.) ( 0 AID) (Z. Se)I (49.b) = 57. ly = 57. 1efs - - 13Pcsti.) o S Z Ag -- =- 50. s- Or- rA.a-ter _ ctoU1/43oAn4 6,�,,�rn,,� - 3'300 T-. _ swm,. sWp� — Z. 670 r I t Ti - fa— fu-sr Soo cr• -rz . I .g OA - oil JS-oo Zb T - (sr zcln T = + = 23 zs := 13.'3 /*nu. , 29.3 + 23. 3= 57. b Nib). {FaciJAA-u. t,ar€osrrps - "r 457. fr r:J. b r''(wt- , lf� = Z. eOL'l - : RMC ROCKY MOl .TAIN CONSULTANTS, INC. �� q�� *Professional Engineers* CLIENT: 761-24/14" CY"/"��' ) JOB NO.: 4criS5b.00l.00 SHEET IO OF IC) DESCRIPTION: A i_.0 • AWL. n4-A. ,,ATS>-)S DESIGNED BY: � DATE: g1Z�'I /it ST� � W . C. AAA° S 7 H 3 CHECKED BY: DATE: _oce" -SLR . Rtho oci- Cette,0 lATS,yJ S c(a rr) 73/067") OS Z. 2UNJF(. QUAoLr5F"S - "Q I. eQ =crii- _ _ Qs- "- ( o.1O)( ► .Ltb) C sv. S) - 7.3 7 .. 7. 9 cys _-Qico " ( 0.1-10) (a.S0) ( TO•S) Sb,Jb = Sto•(0ctt . _St a. _0C-- Dm-co/Kt Swservt. F..,r2 0(-F- Ste.. fuxzs - k (2, 4 si -k- 431 1/CA-Th Q z• epoc,ciL -- c)-77— ), I r ,. 2 fri/C-1 SW PE...._5- Q ; (,Ygb' 04573 S r/.z_ Q= FLovJ ( c S) . rtz. Mak+^1W4S A r- O.037. - _ A = Ate- C s.z. Er.) Ar I t 0€.4n+ OF- AGA) - 5 : Swot C erf Fr ) /1 = 7.Osow1 p.. 9.41tr. , a = _34.r. 36 Cl-S von* cp f w) r.,) loa bnit. AT Le S-_ I Drefi 4 cc- koui — S Nm — a,ctTwevau 1 — i .5- f l. err- 12..00 So Fr P nit i l Fr, Q= 73. ?..1-1 cis . f .. .z. JULDER COUNTY STORM DRAINAGE CRITERIA MANUAL l TABLE 801 C RUNOFF COEFFICIENTS AND PERCENT IMPERVIOUS RUNOFF COEFFICIENTS LAND USE OR PERCENT FREQUENCY . SURFACE CHARACTERISTICS IMPERVIOUS 2 5 10 100 Business: ommercial Areas 95 .87 .87 .88 .89 Neighborhood Areas 70 .60 .65 .70 .80 Residential : Single-Family Figure-603 .40 .45 .50 .60 Multi-Unit (detached) 50 .45 .50 .60 .70 Multi-Unit (attached) 70 .60 .65 .70 .80 1/2 Acre Lot or Larger Figure-603 .30 .35 .40 .60 Apartments 70 .65 .70 .70 .80 Industrial : Light Areas 80 .71 .72 .76 .82 Heavy Areas 90 .80 .80 .85 .90 Parks, Cemetaries 7 .10 .10 .35 .60 Playgrounds 13 .15 .25 .35 .65 _ Schools 50 .45 .50 .60 .70 Railroad Yard Areas 40 .40 .45 .50 .60 Undeveloeed Areas: Historic Flow Analysis 2 (see "Lawns") Greenbelts, Agricultural Offsite Flow Analysis 45 .43 .47 .55 .65 - (when land use not defined) Streets: --MR 100 .87 .88 .90 .93 Gravel 13 .15 .25 .35 .65 Drives and Walks 96 .87 .87 .88 .89 Roofs 90 .80 .85 .90 .90 Lawns, Sandy Soil 0 .00 .01 .05 .20 Lawns, Clayey Soil 0 .05 .10 .20 .40 NOTE: The Rational Formula coefficients do not apply for larger basins where 1 the time-of-concentration exceeds 60 minutes. WRC ENa REFERENCE: USDCM DRC0G Rev. May 1, 1984 ,21.4:.c7. .-: -632- 0O0LDER COUNTY FIGURE 802 STORM DRAINAGE CRITERIA MANUAL TRAVEL TIME VELOCITY FOR RATIONAL METHOD 50 - 30 - - - -- -I i, . !0 Z 20 ° Ic4 1U 0 O. a. c �`a.� 3=yI , . 301' W a 10 W J" V o Z a. Co "4 . =o I a � .■■� ., oW Nr I oo 13 =r I■■� 0 O co A` y �, 3t 5 A. J"� ae 0e rvo o AY 4i1 Qb k ce 3 C7 le Ca Re H eW� 4rII t c 3 ro 1 o 5 / .1 .2 .3 .5 1 2 3 5 10 20 VELOCITY IN FEET PER SECOND • WRC ENG. REFERENCE: "Urban Hydrology For Small Watersheds" TeEBnAoi " r ` Release No. 55, USDA, 5C5 Jan. 1975. -644- BOULDER COUNTY FIGURE sot STORM DRAINAGE CRITERIA MANUAL I RAINFALL ZONES SCALE 10 5 0 IOMILES I:500,000 LARIMER g $ COUNTY m °u S ' ��• :`: LYONS ':..'ALLEN3P K ` ::. -:.: �: ::::: :: III T :;:::..I I _ L.NOM NIT WELD COUNTY '2Sz•'::y;i': '� C. : .• *�e M, GRAND COUNTY " T r 2" e : � 0 .. . ... ... � Lou" couNT r MS ........... ..-v.',.::::.' :: y O $ o GILPIN m • COUNTY JEFFERSON COUNTY WRC ENG. REFERENCE: . Base map from USGS map for State of Colorado, Rev 1980 -1;1'3_ E BOULDER COUNTY STORM DRAINAGE CRITERIA MANUAL FIGURE 502 TIME-INTENSITY-FREQUENCY CURVES ZONE 1 - v -4- t==-A:-== _1 -_-- _ :laws-z�m-__ ___ --ME ag.r.- _-&-EliflffiKectriffigAMmg2:24=-2M-w-E-Otartg-im: ME REEEEEEEEEEEEEEEEC=M==--- - - EE Mm OEEEEEEEEEEEEEEEa E = ENrcME- rigi ME NEE EEEEEEEEEEEEEMrE==DsMWA NALARMEEEFEEEEEEEMPE.g�me_B - iI IEEE:'MEEEEEEEEEEEEEEEEEEAE-- er EIAMEMMEMINE EEEIEE MME- -=M- EMPA,��ir� � a -_--s= - =3emaa®EEE�cas��s�=oc ' ERME NEE EEE MKMPaye'- 1 BligN EEEEEEEEEE EEEEEMENEEMEE - "'E , BER1MEEEEEENNEE MEMPIMMEraM - _ MEEE ILI EEEEEEE EEEENEEEEEE _ 1 _ E.WWw...WIM▪ E MMEEiE gff.� - -3: �lSEEEE==g V.EEEEMEMMPENEEEEE_M�==-0.E -- EMELV EAEEEEEME- EE== - 'E-E- MEE.PEMEEELEM==--_=_� - e EEEE MMENtriL�EEEEEEEEEEEEEEK=M- _: E:ra'EE�.E=a. SEE-agEE�m. =_W- - MI _ m _yam--_ r®E _ EEi i• �rifflO m=FAFTE EEEEE.�E == e E EEE IWOOMINIEIIEEEEE:TA:_ lrin IMEEI_'EEE E WEEEEEOL�E �EENEEE EEOIEE IIIMMILE EEngET MMIRR E II tikTMEEEEE NEdiliiiiiE E®EIISEE AM ESE MII M Fri EEEEE CE:SEEEEEEEEE - .dMEM I _ �� E iiii E SIM MI= I -MEIMilialgiManntiannbiltigiN r--- e IIII : r.:.EEEEE 'LI ESE =- 1;:: -7 -:ESE EEEM � tleTri-_ , Mt EE EEEEEEEEEEEEEE ESE-: IE EEEEEMEEE = =M EEEEM O ®�� E _ 1 „ I t: 1 - ails '; E- -Illi , ::'mil, :+ . , f; it nallEMEM I: 1 . l . I-- i .I ._ .:..-t .= 1 WRC ENG. REFERENCE: WRC TM-1 NOV. 1983 -510- ,. _ r INTRODUCTION: There have been many drainage reports submitted to the City of Longmont employing the Rational Method. Typically, a detention volume must be calculated. The method for construction of a triangular hydrograph is an integral part of this calculation. A simple algorythm, the symmetrical triangular hydrograph, is most often used but is found to be inadequate. The graphic depiction of storm event as a stream-hydrograph appears curvilinear with a steep ascending limb and a tapering descending limb. The closest approximation is the asymmetrical tri- • angular hydrograph(l) . This is , reportedly, within 5% of the curvilinear hydro- graph volumes(2). The following methodology section will outline acceptable standards. This approach will be required for all submittals to the City that vary from the proposed methods in_ the Longmont Storm Drainage Criteria Manual . • METHODOLOGY: f _ The following outline refers to figure 1 and is based on formula derivations(3) that will not appear in this paper. • Qp = 100 year peak developed flow form Q = CiA tc = time of concentration to Qp Qh = 100 year historic flow from Q = CiA T = hydrograph base width in minutes = 2.67 tc t'c = time of concentration to Qh _ Volume, V = 1.335 tc 60 (Qp - Qh) %This formula is derived from triangular area calculations. The following formula is derived from "off-stream" detention criteria() and is not acceptable: (Qp - Qh)2 tc 60 C Qp C = Coefficient from 1.0 to 1.5 CONCLUSION The above criteria will be accepted prior to and after formal adoption of the proposal LSDCM. It is now City Policy. 4 � /rC .Z • ,. . Q�= 43.2 els 7 MOO flan • 5« . $r.g _see- 52 nal c` Qh= aids ic, - _. p I S le / zir to zi T Tine (minults/ . 4/' = an Jleveliang/ O�r'e., ante = 1.335 4 Lo Chao /11;44-;/c / t / 1Z6,7 1 T = ;/449044 /1ydro fe i THrG a Dose = LC 74 4 � LC ASYMFTR/CAL TR/ANGULAR NIORDGTRAP/1 REFERENCES 1. "National Symposium on Urban Hydrology, Hydraulics, and Sediment Control ," University of Kentucky, Lexington, Kentucky, July 26-29, 1976, Mini Course III, "Urban Runoff Hydrographs. . ." 2. "Hydrology, Part I, Watershed Planning," National Engineering Handbook, Section 4, Hydrology, U.S. Department of Agriculture, SCS, Washington D.C. , August 1972. 3. "Urban Storm Drainage Management," Marcel Dekker, Inc. , 1982, Wright et al , Chapter 64. 4. USDCM, DRC0G, .1972, Figure 5-4 and Sections 3.2 and 3.3. • • ", • • FAA MASS BALANCE DETENTION STORAGE METHOD 0=CiA 100 YEAR STORM ONLY FOR ZONE I , LONGMONT LOT 1A, LPIP POND = A • 'ENTER OLTLET PIPE 0 FLOWING 4.20 Composit ACREAGE 'C ' • CA 2.58 0.80 2.06 :r POND _ TOTAL - Outlet cliff Minutes Seconds intensityVolume (ft-3) volume .Diff. (ac. ft. ) r 5 300 8.92 5,526 1 ,260 4.266 0. 10 - 10 600 7.37 9, 123 2,520 6,603 0. 15 15 900 6.27 11 ,651 3,780 7,871 0. 18 20 1 ,200 5.46 13,525 5,040 8,485 0. 19 30 1 ,800 4.34 16, 116 7,560 ( 8,Sb6 ( 0.20 60 3,600 2.68 19,937 15, 120 4,817 0. 11 90 5,400 1.94 21 ,648 22,680 ( 1,032) -0.02 120 7,200 1 .52 22,618 30,240 (7,622) -0. 17 180 10,800 1 .06 23,680 45,360 (21 ,680) -0.50 . • See P. Dz ...p -DG ,u z pre, • F.tms, T344 riet-As& : 4A7 /. 33S C GG (Qp- Qll ) IL 1.3�,s 60) Go ( IS.c -4.2) V • . f.. w � ��%J � N 0 �cr Q to to t2 4 t) to N v 0��''','i; Z )I O a sU � toUu5 ,''�� u.wcc gij it _ I[) it _ to F- Q 11 a II M 2 CC IIn O CC on O I W a C 31 d a o I v t o 0 0 --- • •Z!i" o i e 7 , •, n �. 7,,, \✓ • N 1 0 /.(//:(-� ,' �� - �� 1 ---I"' \ g � s a i s •,�� °aa / P, I II " „� • •coI n I` � / (o -= o - - ____ -- - _ o. �_ c ---- �\ 1 Li"o; �i s �„a II ., -,<�_S _ w -- - --- -. . --- - - '� ( -- - s �: 0 \ - J o �h m��l A\ � L.- n4,�o��v .- , � S a� .i y B 1s o c M rOr\�, l I .- CC.,, -- _ II �n _ �, e 4— -- �\ 1 I 4/V)',� "-�� s I �1 ' \ ..1_01..O II y i P. -__7--------- __ �� ,� j p o - -��- �I �1 I e�avoa o�ai3nn • _ �`�'—n -__ F.f I �,-; - r=te > �,0, _ ,� �0, N" I C .-(3) T W 1// : �� .8 II -=1 1 1 1 j A 6 \ -.. � - O r h tl t i l l A 1/ l - 1 �`\�1 I . V// 1 1 11 ' u n• f //��/ I u h� (1:4r. /yAam li ' ,�, 09i9 ( O u ?(/ m f.' - I', �� M��4 i io i ..,..i ,„:(--)_,) ) . P zi s! ,,,,,_ I J N � Hi �A 1 n — c � d 07 `I I<:�i' �� O ) .., r. sr (1 1 � 00„ --i( l �(�. �� I� - � �' \ a 0 P—I I h ._ _ _�_L. - = • - -- _-- - z. - - -- j - ,. / - l '( } v�\\\\ ' �1 1 �� \ I L ��J .• ••5l 31d1Sa31Ni� II � \, \\l°• INSPECTION REPORT NAME: Permagreen Products Company Roxy F. Vendena LEGAL DESCRIPTION OF PROPERTY: Part of the NE4 of Section 24, T1N, R68W of the 6th P.M. , Weld County, Colorado. DATE: August 8, 1991 CASE NUMBER: USR-654 ZCH-75 The property was reinspected to determine compliance. The property is not in compliance with Operation Standards 4, 5, 6, 7, 8. Operation Standard #4 states: The applicant and/or operator shall implement a runoff containment program for the Use by Special Review are as approved by the Department of Planning Services. The property is not in compliance with runoff containment. Inadequate information is available to determine integrity of the new berms. The design and materials appear to be inadequate to contain runoff. An engineered runoff containment plan is needed. Operation Standard #5 states: The applicant shall comply with the design standards for the Use by Special Review, Section 24.5 et seq. , of the Weld County Zoning Ordinance. 24.5.1.5.1 Storm water retention facilities shall be provided on site which are designed to retain the storm water runoff from the fully developed site from a 100 year storm. No engineered storm water retention facilities exist to retain storm water runoff. Operation Standard #6 states: The applicant shall comply with the Operation Standards for Uses by Special Review, Section 24.6 et seq. , of the Weld County Zoning Ordinance. 24.6.1.6 Property shall be maintained in such a manner that grasses and weeds are not permitted to grow taller than twelve (12) inches. In no event shall the property owner allow the growth of NOXIOUS WEEDS. Ci , INSPECTION REPORT - USR-654 / ZCH-75 Roxy F. Vendena Page 2 Grasses and weeds on the property exceed 12 inches in height on the permimeter of the Special Review permit site. Operation Standard #7 states: Representatives or members of the Weld County Health Department and Weld County Department of Planning Services shall be granted access onto the site at any reasonable time in order to insure the operations carried out on the site comply with the Development Standards stated hereon and all applicable Weld County Regulations. The property is not in compliance with the Weld County Health Department Standards. (See Health Department Notice of Violation dated June 20, 1991) . Operation Standard #B states: The Use by Special Review shall be limited to the plans shown hereon and governed by the Standards as stated above and all applicable Weld County Regulations. Any material deviations from the plans and/or Standards as shown or stated above shall require the approval of an amendment of the Permit by the Weld County Planning Commission and the Board of County Commissioners before such changes from the plans and/or Standards are permitted. Any other changes shall be filed in the office of the Department of Planning Services. The Operation has expanded onto the adjacent property to the south and the property is not in compliance with Operation Standards 2, 4, 5, 6, 7, and 9, as approved and no amendments to the Operation Standards have been made. Operation Standard #9 states: The property owner and/or operator of this operation shall be responsible for complying with all of the above stated standards. Noncompliance with any of the above stated Standards may be reason for revocation of the Permit by the Board of County Commissioners. The property owner and/or operator has not complied with the approved Standards. A video was taken of the property. 447:(74a114 t Current Planner pc: Lee Morrison, Assistant County Attorney eI .v . ,.. v July 24, 1991 Mr. Larry Dempsey Weld County, Colorado Department of Health 1517-16 Avenue Court Greeley, Colorado 8O631 Dear Mr . Dempsey : Thank you for meeting me at our facility at roads 8 and 13 last Friday. As you can see, we are addressing the problems that have created some complaints . As per our conversation, I am writing this letter to inform you of our actions . We are in the process of importing a heavy soil to build berms . We have brought in 5O+ loads so far, and have started construc- tion of the Northwest portion of the berm. We have curtailed our hauling operation until after the first frost . This proceedure alone will eliminate the fly problem next year . We have employed Frontier Fertilizer Co . to spray the flies for this season. If you have any questions , or other input concerning our opera- tion , please feel free to contact me. Best Regardsv�y.�,�� C� � J " Roxy F. Vendena President cc: Mr. Wes Potter Mr . Keith Schuett at 2u RECO 5520 Harlan Arvada,CO 80002 (303)424.9376 FAX(303)422.1432 CAI, _ >.; ,. t .,,,, # 1E' 0 , , re �1, i DEPARTMENT OF PLANNING SERVICES V PHONE(303)356-4000,EXT.4400 91510th STREET ' GAEELEY,COLORADO RADO 80631 e COLORADO July 15, 1991 Mr. Roxy F. Vendena Permagreen Products Company 5520 Harlan Street Arvada, CO 80002 Subject: ZCH - 75 Dear Mr. Vendena: Thank you for your letter of June 6. Your property will be inspected again on or before July 30, 1991, to determine if the uses on your property are in compliance with the approved Operation Standards. Please direct any additional questions or comments to Mr. Keith Schuett, Current Planner, in this office. Mr. Schuett is the individual responsible for resolving this matter. Your cooperation and quick response to this matter is appreciated. Sincerely, C\ta ` kir,..." Chuck Cunliffe, AICP Director AL tot AGR4.. det -or PRODUCTS COMPANY 5520 Harlan Street, Arvada, Colorado 80002 (303) 4247291 - 424.9376 JAN 2 8 REM' June 26 , 1991 Mr. Chuck Cunlisse Head of Planning Department 915 10th St . Greeley, CO 80631 Dear Mr . Cunlisse : I received an inspection report from your office dated June 10 , 1991 . After careful review of this report_, Case No. USR-654 . ZCH-75 , I have come to the conclusion that some of the stated violations of operational standards No. 2, 4 , 5 , 6 , 7 , 8 , and 9 are incorrect to me . Since compliance with operational standards have been one of our priorities , I feel that a response to your report is necessary. No. 2 Whoever has monitored Road #8 and reported that our trucks are using it , must not be familiar with our equipment . We have not used Road 8 since it was pointed out that we were not to use it . We have been hauling fro- 128th and Holly for the last ten days , and prior to that from the Brighton area. Therefore , there would be no occasion to use this route . Please feel free to monitor the movement of our trucks . No . 4 We feel that the berms in the area are adequate for the limited runoff that occurs . I would appreciate very much meeting with you at the site to discuss further the natural drainage in this area . No . 5 Our site does not fall under the category of "fully developed" . For all practical purposes , it is bare , non-farm.able ground . In addressing the storm water retention, the berms at certain locations need to be enlarged slightly, and we have completed doing this . No . 6 The height of the weeds will be reduced. As far as the weeds along the road, I assume that the County will take care of that area . No . 7 We were not aware of this complaint . It is dated on the same day as your complaint . We are in contact with the weld Count: Health Department at this time and will try to find a solution that is mutually agreeable . 4+4MAGite Illllllllugllillllll�qu' Q �► PRODUCTS COMPANY 5520 Harlan Street, Arvada, Colorado 60002 (303) 424-7291 -421.9376 •�. "Taut IS Nan is Owen...NM lyl" No. 8 This property has not been surveyed since 1983 . Apparently a property line was misjudged. However, a small amount of material has been removed from that property as of June 25 , 1991 . We are sorry for any inconvenience that we have caused our neighboring property owner. No. 9 Refer to 2 , 4 , 5 , 5 , 7 , and 8 above . We have been operating since 1949 , ( 1984 in Weld County) , providing a service to the farm community by removing manure from dairies in Weld County and making a finished compost with the material . There have only been a minimal amount of complaints over the years , mostly regarding the flies ; and we have tried to control that problem as best we can. I would like you to look in your records to see just how many people have complained in the past year or two . I don ' t believe you will see more than one name . I would welcome the opportunity to speak with the County Conrissioners regarding our operation . Please feel free to contact re on any of the above comments . Best Regards , Rory F. Vendena President Rry: cjh cc : vMr. Keith So_huett Ms Alice Rinebold f11 l .t, c. . INSPECTION REPORT NAME: Permagreen Products Company Roxy F. Vendena LEGAL DESCRIPTION OF PROPERTY: Part of the NE4 of Section 24, T1N, R68W of the 6th P.M. , Weld County, Colorado DATE: June 19, 1991 CASE NUMBER: USR-654 ZCH-75 The property was inspected to determine compliance. The property is not in compliance with Operation Standards 2, 4, 5, 6, 7, 8. Operation Standard #2 states: The haul route for USA-654:84:50 shall be Weld County Road 13 to Weld County Road 6 to the I-25 Frontage Road due to the unrestricted bridges on this route. The operator is using Weld County Road 8 which is not an approved haul route. Operation Standard #4 states: The applicant and/or operator shall implement a runoff containment program for the Use by Special Review area as approved by the Department of Planning Services. The property is not in compliance with runoff containment. The containment berms have failed. The design and materials are inadequate to contain runoff. Operation Standard #5 states: The applicant shall comply with the design standards for the Use by Special Review, Section 24.5 et seq. , of the Weld County Zoning Ordinance. 24.5. 1.5.1 Storm water retention facilities shall be provided on site which are designed to retain the storm water runoff from the fully developed site from a 100 year storm. The storm water retention facilities do not retain storm water runoff. Operation Standard #6 states: The applicant shall comply with the Operation Standards for Uses by Special Review, Section 24.6 et seq. , of the Weld County Zoning Ordinance. 24.6.1.6 Property shall be maintained in such a manner that grasses and weeds are not permitted to grow taller than twelve (12) inches. In no event shall the property owner allow the growth of NOXIOUS WEEDS. Grasses and weeds on the property exceed 12 inches in height. Operation Standard #7 states: Representatives or members of the Weld County Health Department and Weld County Department of Planning Services shall be granted access onto the site at any reasonable time in order to insure the operations carried out on the site comply with the Development Standards stated hereon and all applicable Weld County Regulations. The property is not in compliance with the Weld County Health Department Standards. (See Health Department Notice of Violation dated June 20, 1991) Operation Standard #8 states: The Use by Special Review shall be limited to the plans shown hereon and governed by the Standards as stated above and all applicable Weld County Regulations. Any material deviations from the plans and/or Standards as shown or stated above shall require the approval of an amendment of the Permit by the Weld County Planning Commission and the Board of County Commissioners before such changes from the plans and/or Standards are permitted. Any other changes shall be filed in the office of the Department of Planning Services. The Operation has expanded onto the adjacent property to the south and the property is not in compliance with Operation Standards 2, 4, 5, 6, 7, and 9, as approved and no amendments to the Operation Standards have been made. Operation Standard $9 states: The property owner and/or operator of this operation shall be responsible for complying with all of the above stated standards. Noncompliance with any of the above stated Standards may be reason for revocation of the Permit by the Board of County Commissioners. The property owner and/or operator has not complied with the approved Standards. rit • A DEPARTMENT OF HEALTH tos\ \ 1517• 16 AVENUE COURT iggig GREELEY,COLORADO 80831 C. ADMINISTRATION (303)953-0586 HEALTH PROTECTION(303)353-0835 COMMUNITY HEALTH(303)353-0839 COLORADO June 20, 1991 Certified Letter No. : P 058 577 412 Legal Action No. : 91-073 Permagreen Inc. 5520 Harlan Street Arvada, Colorado 80002 Dear Mr. Verdena: An inspection of your property at NE4. Section 24, Township 01 North, Range 68 West, Weld County, Colorado; on June 19, 1991, by Alice Rinebold - Environmental Protection Specialist of this department, revealed a discharge violation of run- off from your facility into an adjacent irrigation ditch and onto neighboring property. Please be advised that the discharge is in violation of the Colorado Revised Statute, as follows in part: 25-8-501 Permits required for discharge of pollutants - administration. (1) No person shall discharge any pollutant into any state water from a point source without first having obtained a permit from the division for such discharge. . . . Therefore, you are hereby notified that any discharge to State waters without a Discharge Permit, issued by the Water Quality Control Division, is a violation of Colorado Statute 25-8-501. You are further advised to cease any unauthorized discharge until such time as a Discharge Permit has been issued by the Division. Failure to respond will result in legal action by the State Health Department, Water Quality Control Division. Certified Letter No. : P 058 577 412 Legal Action No. : 91-073 Page 2 If you have any questions concerning this matter, please contact this office at 353-0635. Sincerely, • Alice Rinebold Wes Potter. Director Environmental Protection Specialist Environmental Protection Services AR/WP/lam-61 cc: Randy Gordon, M.D. , Director Lee Morrison, Assistant County Attorney CERTIFICATE OF MAILING I hereby certify that I have placed a true and correct copy of the surrounding property owners and owners and lessees of minerals in accordance with the notification requirements of Weld County in Case Number ZCH-75 for Roxy F. Vendena in the United States Mail, postage prepaid First Class Mail by letter as addressed on the attached list. this 13th day of August, 1991. o.! ,: - e DEPARTMENT OF PLANNING SERVICES PHONE 1303)356,4000,EXT.4400 1tic w. 91510th STREET GREELEY,COLORADO 80631 C. COLORADO TO: SURROUNDING PROPERTY OWNERS Subject: ZCH - 75 NAME: Roxy F. Vendena FOR: Fertilizer storage, mixing, loading and sales operation. LEGAL DESCRIPTION: Part of the NE4 of Section 24, T1N, R68W of the 6th P.M. , Weld County, Colorado. LOCATION: South of Weld County Road 8 and west of Weld County Road 13. A Probable Cause Public Hearing is scheduled before the Weld County Board of County Commissioners on Wednesday, August 28, 1991, at 9:00 a.m. in the County Commissioners' Hearing Room, First Floor, Weld County Centennial Center, 915 1Oth Street, Greeley, Colorado. The purpose of this public hearing will be to review Case Number USR #654 for compliance with the Operation Standards as approved by the Board of County Commissioners on February 20, 1985, to determine if probable cause exists to hold a hearing on revocation of USR #654. You are receiving this notification because your property is within five-hundred (500) feet of the property being reviewed. All persons in any manner interested are requested to attend and may give testimony pertaining to and the uses occurring on the approved site. For additional information write or telephone, Keith A. Schuett, Current Planner. INTEREST OWNERS OF SURFACE ESTATE Roxy F. Vendena ZCH-75 The following interest owners whose properties are located within 500 feet of the boundaries of the property which is the subject of this case, are listed in the records of the Weld County Assessor as of August 12, 1991. Name and Address Parcel Identification No. Cosslett, Richard, et al 62-1467-13-0-00-009 c/o Longmont National Bank 5th and Coffman Longmont, CO 80501 Johnson, D.L. and Virginia 62-1469-18-0-00-006 345 Sunrise Lane Boulder, CO 80302 Lauridsen, Calrence 62-1469-19-0-00-045 399 S. 20th Avenue Brighton, CO 80601 Vendena, Roxy F. 62-1467-24-0-00-037 5520 Harlan Arvada, CO 80002 Totems, Lawrence and Alyce 62-1467-24-0-00-065 7173 Weld County Road 6 Brighton, CO 80601 Linkus, Brad A. 62-1467-0-00-039 5074 Weld County Road 8 Dacono, CO 80514 Oil 67 1 -, AFFIDAVIT OF INTEREST OWNERS SURFACE ESTATE Application No. X7 Subject Property i'T1 (QCE-L} t-'(p 8 STATE OF COLORADO ) ss. COUNTY OF WELD ) THE UNDERSIGNED, being first duly sworn, states that to the best of his or her knowledge the attached list is a true and accurate list of the names, addresses and the corresponding Parcel Identification Number assigned by the Weld County Assessor of the owners of property (the surface estate) within five hundred (500) feet of the property subject to the application. This list was compiled from the records of the Weld County Assessor, or an ownership update from a title or abstract company or attorney, derived from such records, or from the records of the Weld County Clerk and Recorder. The list compiled from the records of the Weld County Assessor shall have been assembled within thirty (30) days of the application submission date. �, _ X l Iv)At C The foregoing instrument was subscribed and sworn to before me this 7 1411 day of 4/1/1/,c11 , 192„. WITNESS my hand and official seal. My Commission expires: MY commission expires Oc aber 15. 1994. � y • !v .9 Notary Pu$Iia i • a :rte A„ rt r '..g PEPIGAD'BaYovle.N.J. ik I7 nt W . r; .4 I-•- t..) cri 0L "R, LAI 4...3 .....,I — 7,e i.."- 7.0 0 IaJ .• 1,1 c 711" 4:-'1 z 4 � 4 z -1' u.g �1 ik'.;ea `¢. zi ' . I ex: L., 10 .., C' � til � I..L.( Ci >" Int x �' F— .J..I .I.- I I � Y L? •d td ( SO ""• .7.L- 4 .....EL-ctG M. rtes inc," u s ul r I 1 *ft G Le; CI de LN i t _� 1 1. , ii ' _ I,L . i ,i . 1 ,l' 'ti D i i 'i im +.`1 !!''1 ,-.." Lei 4� ,.,` u I— _ 1' re r' ` I 1r i3 74 `1 Ct lIC �� `' r 4 Ia.' 1 x w Leh.. ... qti i-- z Li :. 0 La 4.,) Li iv; a. _a •yt Z i� Ida ys. w �.. <5 M" m 1-- o tio 0 J 0, "1 Lai >a; 4--, Q C G oy ue ;4 � m so cc •T_ zo ix) CD M 1t: t+ thy i y rx 0 StSyIlrG « z i $ • ^ ± = L I \ / \ Q ~ \ / 9 J / \ / \ \ ± Z2 l @ » ;^ / � \ o § / 2 � ` 2 r / J � � I & p / ! m $ • & ' / / / \ . A I liII# , / ) Cr § } / / cg Z ! Pl. 'It ' i / \ y -- \ { -------- - I / � / / — _ _ �� / - I f C. . / i m & 4 EXNi si? 1miC vvymu- engineers • planners • surveyors tr c August 22, 1991 Mr. Roxy F. Vendena Permagreen 5520 Harlan Arvada, CO 80002 RE: Drainage at Composting Site Dear Mr. Vendena: As per your request I am forwarding to you my opinion concerning how best to control the storm drainage on the 15.34 acres you own in the NE 1/4 NE 1/4 and SE 1/4 NE 1/4, Section 24, T1N, R68W, 6th P.M. , Weld County, Colorado. It is recommended that two approaches be used to control the storm drainage problem. First, off-site drainage arising from lands not owned by you but coming onto your property from the north, east, and south must be controlled so that it does not enter the site. This drainage should be piped through your property to the unnamed gulch (natural drainageway) immediately west of your property or, if possible, directed around your property to the natural drainageway. The Weld County Road Maintenance Department and/or the appropriate officials from the Town of Dacono should be contacted with regard to the responsibility and how best to handle the off-site drainage. If you prefer, I can contact them on your behalf. Second, with respect to drainage on your property, it is recommended that you continue the current practice of detaining storm waters and reapplying the water to your land during dry periods. In this way the water will be consumed and will not come in contact with the surface water that is tributary to the natural drainageway west of your property. You have done a good job in constructing the berm and it is recommended that you continue the course of action that you have begun, i .e. , control of the water on your property in detention ponds and reapplying it to your land in order to assure total consumption of the water. In viewing and discussing the site with you and your superintendent, it appears that at least four small detention ponds, the purchase of a pump, and other appurtenances that will be needed to reapply the water to the land will be required. We will provide you with the 100 year storm drainage calculations for the sizing of the storm detention ponds, the design of the detention ponds, and the design of the supporting facilities. Rocky Mountain Consultants, Inc. 1960 Industrial Circle, Suite A, Longmont, Colorado 80501 303-772-5282 Offices also in Denver and Estes Park, CO Metro line: 665-6283 Fax No. 665-6959 : ' 9 i , Mr. Vendena August 22, 1991 Page 2 In summary, it is recommended that you continue present practices for on-site drainage control , and that Weld County or the Town of Dacono be contacted with regard to control of the off-site drainage. Our assistance is available at your request. Please do not hesitate to call if you have any questions. Sincerely, ROCKY 11 iTAI tOT r S. I' ob t . Brand, P.E. ncipal 6.1\VENDENA.LTR RfilIC engineers • planners • surveyors August 22, 1991 Mr. Roxy F. Vendena Permagreen 5520 Harlan Arvada, CO 80002 RE: Drainage at Composting Site Dear Mr. Vendena: As per your request I am forwarding to you my opinion concerning how best to control the storm drainage on the 15.34 acres you own in the NE 1/4 NE 1/4 and SE 1/4 NE 1/4, Section 24, T1N, R68W, 6th P.M. , Weld County, Colorado. It is recommended that two approaches be used to control the storm drainage problem. First, off-site drainage arising from lands not owned by you but coming onto your property from the north, east, and south must be controlled so that it does not enter the site. This drainage should be piped through your property to the unnamed gulch (natural drainageway) immediately west of your property or, if possible, directed around your property to the natural drainageway. The Weld County Road Maintenance Department and/or the appropriate officials from the Town of Dacono should be contacted with regard to the responsibility and how best to handle the off-site drainage. If you prefer, I can contact them on your behalf. Second, with respect to drainage on your property, it is recommended that you continue the current practice of detaining storm waters and reapplying the water to your land during dry periods. In this way the water will be consumed and will not come in contact with the surface water that is tributary to the natural drainageway west of your property. You have done a good job in constructing the berm and it is recommended that you continue the course of action that you have begun, i .e. , control of the water on your property in detention ponds and reapplying it to your land in order to assure total consumption of the water. In viewing and discussing the site with you and your superintendent, it appears that at least four small detention ponds, the purchase of a pump, and other appurtenances that will be needed to reapply the water to the land will be required. We will provide you with the 100 year storm drainage calculations for the sizing of the storm detention ponds, the design of the detention ponds, and the design of the supporting facilities. • Rocky Mountain Consultants, Inc. 1960 Industrial Circle, Suite A, Longmont, Colorado 80501 303-772-5282 Offices also in Denver and Estes Park, CO Metro line: 665-6283 Fax No. 665.6959 CV! .y �,. t Mr. Vendena August 22, 1991 Page 2 In summary, it is recommended that you continue present practices for on-site drainage control , and that Weld County or the Town of Dacono be contacted with regard to control of the off-site drainage. Our assistance is available at your request. Please do not hesitate to call if you have any questions. Sincerely, ROCKY U ITAI 7T I S I' ob t . Brand, P.E. ncipal 6.1\VENDENA.LTR PL0846 CASE - 911339 USR654 ZCH75 THIS FILE CONTAINS PICTURES AS EXHIBITS . PLEASE SEE ORIGINAL FILE . Hello