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Home My WebLink About20102988.tiff RESOLUTION RE: APPROVE AGREEMENT TO MINE WITHIN 200 FEET OF PERMANENT MANMADE STRUCTURES AND AUTHORIZE CHAIR TO SIGN - LAFARGE WEST, INC. 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, the Board has been presented with an Agreement to Mine within 200 Feet of Permanent Manmade Structures between the County of Weld, State of Colorado, by and through the Board of County Commissioners of Weld County, and Lafarge West, Inc.,for property described below, commencing upon full execution, with terms and conditions being as stated in said agreement, and Iverson Mine, a sand and gravel mining operation located within Section 34, Township 6 North, Range 66 West of the 6th P.M., Weld County, Colorado WHEREAS, after review,the Board deems it advisable to approve said agreement, a copy of which is attached hereto and incorporated herein by reference. NOW, THEREFORE, BE IT RESOLVED by the Board of County Commissioners of Weld County, Colorado, that the Agreement to Mine within 200 Feet of Permanent Manmade Structures between the County of Weld, State of Colorado, by and through the Board of County Commissioners of Weld County, and Lafarge West, Inc., be, and hereby is, approved. BE IT FURTHER RESOLVED by the Board that the Chair be, and hereby is, authorized to sign said agreement. o-1\`es JO 1 elr ie LL : CA Lc�ctwee , icirc.7<ch, PI. 20 -2988 6 / -)/-/O I-19- II APPROVE AGREEMENT TO MINE WITHIN 200 FEET OF PERMANENT MANMADE STRUCTURES AND AUTHORIZE CHAIR TO SIGN - LAFARGE WEST, INC. PAGE 2 The above and foregoing Resolution was, on motion duly made and seconded, adopted by the following vote on the 20th day of December, A.D., 2010. BOARD OF COUNTY COMMISSIONERS E 1,/ LD COp TY, COLORADO . ATTEST: r'N 1661 er,fric, ,l` s Radem the , Chair Weld County Clerk to the Boar BY: ° 1 kit -..i -r.bara Kirkmeye , Pro-Tem Depot Clerk t the Board Sean P. Conway 0 APPRf7/ED ORM: EXCUSED �7 r W' I- F. Garcia (� r 2 County Attorney (1„J € dam , / David E. Long �/ Date of signature: I 3 L\ t8 2010-2988 BC0041 AGREEMENT TO MINE WITHIN 200 FEET OF PERMANENT MANMADE STRUCTURES THIS AGREEMENT, entered into by and between Lafarge West, Inc., hereinafter called "Lafarge", whose address is 11409 Business Park Circle, Suite 200, Longmont, CO 80504, and: Weld County 915 10th Street, Greeley, CO 80632 Hereinafter referred to as the"Structure Owner". The Colorado Mined Land Reclamation Act requires that landowners adjacent to a proposed mining operation be informed about the mine and the reclamation. Further, the Act provides protection for structures that are within 200 feet of a mining operation. Lafarge will be submitting an application to the State of Colorado Division of Reclamation, Mining and Safety for a 112 Reclamation Permit and an application to Weld County for a Use by Special Review Permit for the Iverson Mine, a sand and gravel mining operation to located within Section 34, T6N, R66W of the 6th P.M., Weld County, Colorado. The Structure Owner owns a permanent manmade structure or structures within 200 feet of the land affected by the mining and reclamation operations. The description of the structure(s) is as follows: Poudre River Trail and Fences Lafarge must attempt to obtain permission from Structure Owner in order to conduct operations closer than 200 feet to the structures owned by the Structure Owner. In addition, Lafarge must commit to repairing, replacing, or compensating Structure Owner for any damage that might be caused to its structure(s) by the mining operation of Lafarge at this site. By this agreement, Structure Owner consents to Lafarge conducting mining operations less than 200 feet from Structure Owner's structure(s). Lafarge commits that, if its operation causes damages to Structure Owner's structure(s) within 200 feet of said operations, Lafarge will repair or replace such structure or compensate Structure Owner for the value of said structure. Any replacement or compensation must provide for the restoration of said structure to its condition immediately prior to the damage taking place. 2010-2988 The parties hereto acknowledge and agree to the above-stated items. AGREED: Lafarge , c. By: s— Date: ( —O Todd Ohlheiser Vice President Rocky Mountain Agg State of Colorado ) ) ss. County of The foregoing instrument was acknowledged before me this r9nf day of u 4,-,( , 20 1 , by Todd Ohlheiser, Vice President of Rocky Mountain Agg of Lafarge West, Inc. My Commission Expires: 3 6 o( ! \Ns. Fpy ,, o 7 \\OTARY `LCYf / = U LIX 1 C a � � ✓y PUBOG ? O Notary Public ' = °f 9-tO -F..CO� .....„Weld County ��votinn �"`�� \cc) nm��+S �1c�Cry-� Date: DEr 2 0 2010 Douglas Rade acher, Chair State of Colorado ) ) ss. County of Weld ) The foregoing instrument was acknowledged before me this 20th day of December 20 10 by Douglas Rademacher as Chair; Board of County Commissioners for Weld County. My Commission Expires: 1- x-01 O�pFY'"PUBei�, v v TONYA 1 Notary P lic N ISNEY :oo 9T••. .. P��3sir u3»sii-i000T �r��s mss' �tntsnvei��r�o�vuc9�eFrn�n us�w ea MY COMM. EXP. 10-07-2014 &cic 9ek Page 2 of 2 LAFARGE o , , i ! , LC Lirr i AGGREGATES r^1' " -..Eps & CONCRETE ZEil JAN I i A q1 50 January 17, 2011 Ms. Tonya Disney, Weld County Clerk to the Board PO Box 758 915 10th Street Greeley, CO 80632 Dear Ms Disney, Enclosed is one original "Agreement to Mine within 200 Feet of Permanent Manmade Structures"for the Poudre River Trail at our proposed Iverson Mine. Thank you for your immediate response. Once again,thank you for your assistance. Sincerely, (-I) Anne Best Johnson,AICP Land Manager LAFARGE WEST, INC. 11409 Business Park Circle,Suite 200 Longmont,Colorado 80504 Telephone: (303)684-2307 Facsimile: (303)684-2327 lit TETRA TECH ri •November 30, 2010 8DEC - 22010 ho Mr. Bruce Barker County Attorney Weld County 915 10`h Street Greeley, CO 80632 RE: Manmade structures within 200' of the Iverson Mine Dear Mr. Barker: Lafarge West, Inc. (Lafarge) will be applying for a Regular 112 Reclamation Permit with the Colorado Division of Reclamation, Mining, and Safety (DRMS)to mine sand and gravel on the Iverson property which is located in Section 34 T6N, R66W of the 6th P.M., Weld County, Colorado. As is required by the DRMS, we are notifying you because the Poudre River Trail and fences along the trail are within 200' of the land that will be affected by mining and reclamation operations on the Iverson property. Therefore, the DRMS asks that Lafarge submit a notarized agreement between the Weld County and Lafarge that indicates that Lafarge will compensate the County (the structure owner) for any damage to your structures caused by the mining. If an agreement cannot be reached, Lafarge is required to submit an engineering evaluation to demonstrate that the structure will not be damaged by the mining activities. Therefore, as part of the process of designing the mining and reclamation plan for the Iverson property, Lafarge asked Tetra Tech prepare a Stability Analysis Report to address the stability of permanent manmade structures within 200' of the mining operation areas. Attached is a copy of that Report. The Report indicates that while the proposed mining and reclamation activities on the Iverson property will be less than 200' from your structures, it should not pose a hazard to the trail or fences. Attached are two copies of an Agreement that we have drafted which commits Lafarge to repairing, replacing or compensating you for any damage to your fence caused by the mining. If the Agreement is acceptable as prepared, please let me know and I will have Lafarge sign the Agreement so that you can then forward it on to the County Commissioners for the Chair to sign. My contact information is as follows: Pam Hora Tetra Tech 1900 S. Sunset Street, Suite 1 F Longmont, CO 80501 Phone: 303-772-5282 Email: pam.hora@tetratech.com b iII vmo h d :Ii a7S01 Page 2 of 2 E TETRA TECH Mr. Bruce Barker November 30, 2010 If I do not hear from you by January 31, 2011, we will just submit a copy of this letter, the certified mailing receipt showing the letter was sent to you, and a copy of our Stability Analysis Report to the DRMS in order to satisfy the DRMS requirement. Please call me if you have any questions about this request. Thank you for your attention to this matter. Sincerely, TETRA TECH Pamela Franch Hora, AICP Senior Planner Attachments: Structures Agreement Stability Analysis Report cc: Anne Best Johnson, AICP, Lafarge West, Inc. P v3J5 I I I 53-23511-10002 DelherablesV DRMS Application Packae L l lbit 5VCorrnp d nmAWeld Pnunto Corer Letter doc [j ) tt TETRA TECH October 27,2010 Ms.Anne Best Johnson,A1CP Lafarge West,Inc Business Park Circle,Suite 200 Longmont,Colorado 80504 Re: Stability Analysis for Lafarge Iverson Property,Weld County,Colorado; Tetra Tech Job No. 133-23511-10002 Dear Ms.Johnson: This letter addresses Construction Materials Rule 6,Section 4, Subsection 19,Exhibit S-Permanent Man-Made Structures(6.4.19,Exhibit S)for the permit for the above-referenced aggregate mine. The proposed mine is located in the central portion of Section 34,Township 6 North,Range 66 West of the 6i° Principal Meridian. The site is located in Weld County,Colorado. Several aggregate mines are present in the area. Other land uses in the area are predominately agricultural and rural to low density residential. Several structures including the Poudre River Trail recreational path,a communications tower and associated appurtenances,the Boyd Freeman irrigation ditch,gas wells and associated appurtenances,fences,and a single family residence with associated out buildings are within 200 feet of the mine limits of the proposed mine area. The locations of the structures are shown on Figure I. Regional geologic mapping(see below)indicates mining will be in floodplain alluvial deposits. Borehole data (Attachment B)encountered bedrock at depths ranging from 14 to 29 feet below the surface indicating mining conditions that result in varying highwall heights. GEOLOGIC STRATA AND MINING CONDITIONS Geologic mapping by Hershey and Schneider(1972)indicates the proposed mine site is south of and adjacent to the Cache La Poudre River on the flood plain alluvial deposit known as the Valley Fill alluvium. The deposit is composed of sands,silts,and clays. The site subsurface conditions were investigated through an exploratory drilling and monitoring well installation program conducted by Tetra Tech and Lafarge. The boring data indicates the depth to bedrock along the proposed mine limit ranges from approximately 14 feet in the southeast corner to 29 feet in the northwest corner. Mining of the property will result in highwalls ranging from approximately 14 to 33 feet high. Mine highwall heights will vary with depth to bedrock. Groundwater depths typically averaged 7 to 9 feet below the ground surface. From a geotechnical standpoint,the sand and gravel will form most of the mine slope. These soils are generally strong and stable,particularly when dewatered. Minor amounts of clay will lie at the ground surface and locally as lenses within the sand and gravel. KNOWN STRUCTURES WITHIN 100 FEET OF MINING LIMITS Known man-made structures within 200 feet of the mine limits are listed below: • Three Noble Energy gas wells(Labeled Well A,B,and C on Figure 1) • Gas lines associated with the Nobel Energy gas wells • A Noble Energy gas separator Ms.Anne Best Johnson AICP fl TETRA TECH October 27, 2010 Page 2 • A Noble Energy gas storage tank • A gas well operations access road • A communications tower and associated facilities and access road,owned by TowerCo • Facilities associated with the communications tower • A private residence and associated out buildings • The Poudre River Trail owned by Weld County • The Boyd Freeman irrigation ditch,owned by the Boyd Irrigation Company • Various fences surrounding the property. STABILITY ANALYSES Stability analyses were performed in order to evaluate potential for damage to existing permanent structures due to mine highwall slope failures. Analyses were performed with the Slope/W 2007 v7.17 computer program. For each case we analyzed the most critical soil profile(s)based on exploratory boring data(i.e. the tallest highwall, thickest overburden layer,etc). The stability analyses were run in accordance with accepted geotechnical standards and DRMS requirements for temporary pit slopes summarized as follows: • Mine highwalls modeled as vertical slopes • Residual soil strength parameters used for the upper 2.5 feet of weathered bedrock • Factor of Safety must be greater than 1.0 Groundwater levels on the profiles were input to portray site dewatering. Laboratory strength tests were not performed on soils from the site. The soil strength parameters used were based on typical values for the anticipated soils and our experience working with DBMS at other sites in the area. The input strength parameters were: Table 1 Stability Analysis Strength Parameters Material Moist Unit Saturated Unit Effective Cohesion Effective Friction Weight(pcj) Weight(pcj) (p4) Angle(degrees) Overburden clay 114 126 150 28 Sand and gravel 130 137 0 37 Clay Lense 116 119 200 22 Weathered Residual 124 134 0 14 Strength Bedrock Claystone Bedrock 124 134 500 22 The scenarios were modeled with a general section developed from the most conservative conditions encountered at the site including 6 feet of overburden overlying 33 feet of sand and gravel. Beneath the alluvium,the section was modeled with 2.5 feet of residual strength bedrock on top of claystone bedrock. The structures within 200 feet of the mine limit are shown in Table 2. Ms. Anne Best Johnson AICP litTETRA TECH October 27,2010 Page 3 Table 2—Structures within 200 feet of mine limit Structure Structure Owner Structure Location Gas Wells A,B,and C Noble Energy Various locations-See Figure 1 Gas Operations Access Road Noble Energy Located along the southern and western mine limits. Provides access to all the Noble Energy gas structures Gas Lines Noble Energy Located along the southern and western mine limits. Connects all the Noble Energy gas structures. Gas Separator Noble Energy Located along the western mine limit approximately 800 feet north of the SW curser,approximately 80 feet from the mine font. Gas Storage Tank Noble Energy Located along the western mine limit approximately 700 feet north of the SW curser,approximately 100 feet from the mine limit. Communication Tower Facilities and TowerCo Located approximately 250 feet northwest Access Road of the southeast corner of the property. Critical location is approximately 60 feet from the mine limit Communication Tower Telephone TowerCo Critical location is near the Communications Line Tower,approximately 80 feet from the mine limit. Electric Lines Xcel Energy Critical location is near the Communications Tower,approximately 105 feet from the mine link. Fences Tim D.and Jeanne Iverson The most critical fence location is located City of Greeley along the eastern property boundary,40 feet Weld County east of the east mine limit. Iverson Residence Tim D. and Jeanne Iverson Located near the southeast corner of the property,approximately 145 feet south of the mine lint Miscellaneous Out Buildings Tim D. and Jeanne Iverson Critical location is near the Iverson residence,approximately 125 feet from the mine lino. Poudre River Tail Weld County Located along the southern property limit. Critical location is approximately 140 feet south of the southern mine lima. Boyd Freeman Ditch The Boyd Irrigation Company Located along the southern property link. Critical location is approximately 90 feet south of the southern mine limit. Stability analyses were run on randomly generated circles generated through the mine excavation and highwall,as well as at the nearby permanent structures. The Slope/W program calculated the Factors of Safety(FOS)using the ordinary,Bishop,Janbu,and Spencer Methods. The Spencer factor of safety correlates more closely with observations of actual slope failure,providing a realistic and more rigorous factor of safety. On the annotated cross sections(Attachment A),the Spencer factor of safety is listed. The results of the analyses are listed in Table 3. Ms. Anne Best Johnson AICP lb(---% TETRA TECH October 27,2010 Page 4 • Table 3 Stability Analysis Results Section Distance to Nearest Factors of Safety Permanent Structure Gas Well A 100 1.5 Gas Well B 100 1.5 Gas Well C 100 1.5 Gas Separator 80 1.3 Gas Storage Tank 100 1.3 Gas Operations Access Road 50 1.1' Gas Lines 50 1.1' Communication Tower 60 Facilities and Access Road I.l Communication Tower Telephone Line 80 1.3t Electric Lines 105 1.6' Fences 40 1.0' Iverson Residence 145 2.1 Miscellaneous Out Buildings 125 1.7 Poudre River Trail 140 2.11 Boyd Freeman Ditch 90 1.4' 1 - Only the closest structure location to the proposed mine highwall was modeled. The minimum setbacks are equal to the distances in the table above. All FOS are 1.0 or greater. Mining, following these minimum setbacks,should not pose a hazard to nearby structures. LIMITATIONS Our review is based on regional geologic mapping,present mining plans,exploratory boring data,known structure locations,and stability analyses using typical soil strength parameters. Should the mining plans change, subsurface conditions vary or structure locations differ from those portrayed in this letter,we should be contacted in order to re-evaluate the potential affects on man-made structures. Please call with any questions or comments that you might have. Sincerely, TETRA TECH • Jeremy Deuto,P.G. Gary Linden,R.G. Engineering Geologist Project Manager JD:em Attachments: Figure 1 Attachment A Attachment B P.23511 13323511 10002 Deliverables DRMSIApphrobon Package Stability Exhibit Iverson Stability Analysis Leiter 10.25-10 doc • MbTETRA TECH REFERENCES Hershey,L.A. and Schneider, P.A.; 1972;"Geologic Map of the Lower Cache La Poudre River Basin, North-Central Colorado";U.S.G.S.Map I-687. / -- -' 1 • �_m. -- . /.•.g.-.•..2:-' ' „° _ -`'rte 1- ;/ sine'" _.-. .. +A_ -? _• - �fa ,,, L.. ', I,•i•, `.__ r St„---• .,.• , strrrtir EE i , '_ MINING 4 --�� \ 'a:: LIMITS • II 1 ' _• :411;; IVERSON • ` ,I ;" :; • '•. y ac 6• . 111# PROPERTY '-7,-**' - 4. ♦; :i••` BOUNDARY 1i• •. ; • J i-`,rx =- \ I •1 _ - ,- 1 X11 1)11 {11(1 , , • . • %... [;_ 1. `E:: • GAS WELL A ':. ;. I • 1 1• - .1. '•. • . yGY • , - _ _ • ft Z -• Y•- • . -tom • •_ ..33yyVV IV _ bi , 1::::1-1 ''iii, .`/��( -___••_... • ___ `♦•1 ' �, •� ., •1; -r •• • 2(.9 ::.. • ;1 •l,, ✓ 1 . ,• CO ;31, p Ir A LL , •. y . / :•: _et V/ •. R. • ',,•.♦• i w r• / • •, • \ .1 - ♦ • 1 i•_ii' '' ' •• `1 ...# FS\Y:,i,t1YA Tie • j r AS LINE .. ! = - 111 , ..... 1' ILt- • `\ '•♦ I 1•♦ •\I 'AY T- • n. - Ir;/' S.�• 11 W I : . .7 Mt ; •. •LIL.... • FENCE •!1.C I /lib'.1";:.sI I .II • 'i ♦-IJ'•11• •.. I '• 1 F- Yo1• .• � I ; f • i ELECTRIC ; - 1; • •: ; COMMUNICATION LINE • m GAS i. '11 ,J TOWER FACILITIES Q • .; 1 I- ` /•• c�L 'I' :: SEPARATQR •1 _sr' ;' AND ACCESS oNE y" 1 • LINE CO • '1 • ,' r,'%! GAS WELL B • ,['^�LINE TO BE ' ROAD -- - X11 W - •, r .• • I ` • LOCATED • a ` Y 0 200' 400' ;�`I , '. N. ; • 5. ;I U 1 1 . •14 �aAS uNE MISC. OUT 11" •= GAS BUILDINGS its IVERSON O 1 ` • • STORAGE RESIDENCE\ :A- ya I ♦--_ Z iTANK •N. I,H1FCD LEGEND I t is ' ` 1NE u ,N ,..., , CL • GAS OPE TKiNS . . WELL C r iselkirS...... tilun Q 1 BORINGS BY • z..,;, : ACCESS x� MIA, 2 „ � �, !•J' gr �'v"'t ri i •, ; . _ -„ 10~ •• lir. S'.�.�^♦mss-�• •' II g, LAFARGE ::st=__ • _I _ — _ co.: "� ..� _ I' 1 Lit • ,1 ;. t�` //7 }B9YD FREEMAN J _ '• Wal,MW-1 MONITORING ,., T 1� L +y1t Ir-C-I4• 1 I 03 -elWELLS ▪ • , BY _ • ;_ 1 . P IDRE; `•; -•• ; '1 . --- y% '�>� - - W TETRA TECH = `' 'piplyit %�� ; R / %%% A _ - '3 -; I ;: ...•• ••• N •-. .-_rte .-i Fy 0,: ..-'. �.-_ .ww..._-•:'mss. '' • ' 1 -"In-!". n. a.a. LAFARGE WEST, INC. Project No.: 133-23511-10002 ,� `n L . TETRA TECH IVERSON MINE Tr Date: 10-20-10CL N V — Designed y: r cp www.tetratech.com SITE PLAN SHOWING PERMANENT FIGURE N 1900 S. SUNSET STREET ISTEI-F STRUCTURES WITHIN 200' OF MINE LIMITS N LONGMONT, COLORADO 80501 o \ PHONE. (303) 772-5282 FAX. 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Z D O fe a z D O a z D O a I I I I I I I I I I I I I I I i I I rlN I o • 1 LT I I 1 I I II I I aj I " w � 8 :n It I U, IO2) a o I U) i0O N I a 0) 1 0 >. lC t '= 4- 1 U 5 O f C v) 1 � 1510 a .0 co O + 0 0 u. a c O w (0 — (D 0 N co a s. 5 H U) a) ≥ p r. 0 in cu ' co ti- 4.• Co a o � a o C I co 0 c r r L O I I- 0 U) co m ch > co r s V O M yam„ ` ao l �' ' N J U (0 (0 `o co,p CD � c� c0 co (00 (0 r r ccO. 0 a v d v v d 4 4 4 4 4 v d' 4 d' 4 d' (000 x) (Ti) uo!IeneI2 V Y O Q) U O m a , co a C Q. ,.- O a o v a -o N ti- v co Cl) co ,� v- C co C M '- N (D co !n O r- O CO r a O r a O O a L L • • >, -;-; ir> N r in L O cts O C V o o ° 0 O ° 0 N o ° o o ° N N N > M N > o gctI a) 1- E y .c _ E _c . . E .— r . . E .c co C o L ca C O L CO C o 1 co c o L1 Z D O d Z Z O a Z D O d Z D O a1 I 1 i E $ I i I O 1 CO I a rum / / / O / Lo / / / r / O / .7t. f in- I o / LL / >, a� / _ I O 13 / co co I co / Q) / a / o i (75 / N O I 1 C) d• r / I a �-• 1 �� X 4 J O W RS I >, V) I 4- / 0 CO o I L I CO O o I o (n CO - CU Lis t Q C0O / a / C / o / .y V co / o U ++ I a a o / 5 _ / ( CD i CY E / O O r Nin- J+ L� t 15 '+"' LL / L t .4.1 o O O Cn CO co / co N E O O o O N O t C L w % C 4-+ in it O O % o co co % N I co t co 0 _ ico CD CZ t L V 1 4... ._ co al L J U LO O LC) O uU O in O LID o LO O Ln o Ln O a O) CO CO N- N- CO CO 1.0 If) d- d- CO CO N N CO CC) CO CO CO CO CO CO CO CO CO CO CC) CO CC) CO ( 000I, X) (4) uoReneia ATTACHMENT B DRILL LOGS Tetra Tech LEGEND © 1900 South Sunset Street Longmont,Colorado 80501 Telephone:(303)-772-5282 Fax:(303)-772-7039 CLIENT Lafarge PROJECT NAME Observation Wells,35th Avenue Pit PROJECT NUMBER 133-23511-08005 PROJECT LOCATION Iverson,Brown,and City of Greeley Properties LITHOLOGIC SYMBOLS SAMPLER SYMBOLS (Unified Soil Classification System) XSplit Spoon • CL: USCS Low Plasticity Clay 7 SC: USCS Clayey Sand .f: ,:<.,. SM: USCS Silty Sand `'' ' SP-SM: USCS Poorly-graded Sand with :.- Silt SW: USCS Well-graded Sand WELL CONSTRUCTION SYMBOLS 0 Capped Steel Riser Over Top of PVC, with a V' CLAYSTONE: Claystone Lock a SANDSTONE Sandstone c N .L :e Cement Seal 0 a w rc Bentonite Seal 0 0 z a 0 Grade 10-20 Sand Filter Pack u, cr 0 0 0 it %i 0 0 • • Natural Caved Backfill 0 ice • -I a is l: a D 0 °D tall Natural Caved Material ni a 2" I.D. Schedule 40 PVC 03 o 2" I.D. Schedule 40 PVC, 20 Slot Pipe 0 m 5 ABBREVIATIONS 0 i- N z 4 Water Level at Time - Drilling,or as Shown w w Water Level at End of Drilling,or as Shown F Water Level After 24 R - Hours,or as Shown 0 0 O 0 w Tetra Tech WELL TT-MW-01 1900 South Sunset Street It l' i Longmont,Colorado 80501 PAGE 1 OF 1 Telephone:(303)-772-5282 Fax:(303)-772-7039 CLIENT Lafarge PROJECT NAME Observation Wells,35th Avenue Pit PROJECT NUMBER 133-23511-08005 PROJECT LOCATION Iverson,Brown,and City of Greeley Properties DATE/TIME STARTED 12/15/08 11:00 COMPLETED 12/15/08 12:45 GROUND ELEVATION 4692.3 ft HOLE SIZE 8" DRILLING CONTRACTOR Drilling Engineers GROUND WATER LEVELS: DRILLING METHOD 4.25"I.D.Hollow Stem Auger V AT TIME OF DRILLING 9.00 ft I Elev 4683.30 ft LOGGED BY J.Deuto CHECKED BY G.Linden AT END OF DRILLING --- NOTES Iverson Property,Clear cold,0 deg F 7. 24hrs AFTER DRILLING 6.49 ft/Elev 4685.81 ft COORDINATES 519972.6 4476801.5 w WELL DIAGRAM tY cn w U Casing Top Elev:4694.9(ft) wm OZ-I U u1w °-8 ~., MATERIAL DESCRIPTION 0� aD in 0> vz Q J �-I Stickup M oz - 0 u) 0 SAND:medium dense,moist,dark brown,fine to coarse grained, A• 4• Concrete clayey,organics,(SC) SC o ~ Bentonite - 4.5 4687.8 W 5 XSS 3-3-4 SAND:medium dense,moist to wet,light brown to tan,fine to coarse (7) • grained,well graded,some silt,gravelly,(SW) 0 - I-- - 'ice[ iii:o *• �s• a- - .% .... Z 10 X SS 7-10-11 Z'z •* J (21) a L.i VA Z • L. - SW I.L�'r�,',r 0- -Ill !i,i=sti m 41., i—�' Natural Cave 0 15 S'N�s r Val':- 2 o 4\7=Lf., �..'4. Iii 0 lilt f• - - '�''I•'Sl ,n- -` �r o- 20 '.::: 20.0 4672.3 i"""-"' ►'�l♦fii co CLAYSTONE:hard,moist,gray,sandy :�o•''li 7; i411=i4b1 2 X_SS 35-5013" 22.8 4669.5,.=-7,$.4--7.' o Bottom of borehole at 22.8 feet. a, 0 a N 0 0 q (fl 5 0 0 I- Z 0 g Z W U W F Qa' w I- Tetra Tech WELL TT-MW-02 1900 South Sunset Street .. Longmont,Colorado 80501 PAGE 1 OF 1 Telephone:(303)-772-5282 Fax:(303)-772-7039 CLIENT Lafarge PROJECT NAME Observation Wells,35th Avenue Pit PROJECT NUMBER 133-23511-08005 PROJECT LOCATION Iverson,Brown,and City of Greeley Properties DATEITIME STARTED 12/15/08 13:00 COMPLETED 12/15/08 14:45 GROUND ELEVATION 4690.7 ft HOLE SIZE 8" DRILLING CONTRACTOR Drilling Engineers GROUND WATER LEVELS: DRILLING METHOD 4.25"I.D.Hollow Stem Auger AT TIME OF DRILLING --- LOGGED BY J.Deuto CHECKED BY G.Linden AT END OF DRILLING --- NOTES Iverson Property,Clear cold,-1 deg F ! 24hrs AFTER DRILLING 6.12 ft/Elev 4684.58 ft COORDINATES 520157.92 4476801.5 w WELL DIAGRAM a ~ • H W H D CO W W 2 O Casing Top Elev:4693.5(ft) w x -i co O ¢ Q> a O MATERIAL DESCRIPTION f� o 2z e0 O> �� Stickup Lo m 0 CLAY:medium stiff to stiff,moist,dark brown,sandy,(CL) •!1• •4• Concrete CL o. 4 3.5 4687.2 Bentonite c? •'.. . SAND:loose,moist to wet,light brown to tan,fine grained,some silt, w 5 X SS 1-2-3 �::. to silty,(SM) a f (5) :.: .: < ...., pi Iii 10-20 Sand O 'fib 41. d- - :fir . . WI Z 10 X 1-3-36) .•. !ir.ti 's.i D L L o - ;'\_ 11.0 4679.7=2��'WA • SAND:wet,light brown to tan,fine to coarse grained,well graded, !mar=L r some silt,gravelly,(SW) ii�L o - =�• Natural Cave - '`� a i O- - �a�«�L •. eh 15 SW lii�_L si o 'iii '.•` O 'i•iWil :`.1 :.. D Ai 'L:Ti 0 ▪ 18.0 4672.7=! •! Er-) CLAYSTONE:hard,moist,gray,sandy L`E m_ 2 SS 31-50/2" r/_19.7 4671.0,,T.3_,,,'.0-.y Bottom of borehole at 19.7 feet. N M a M m 0 o, 0 0 N H 0 o 0 al 3 a) N Z o a, W Z W O I C.) w I- l• F- I- Tetra Tech WELL TT-MW-03 © 1900 South Sunset Street PAGE 1 OF 1 Longmont,Colorado 80501 Telephone:(303)-772-5282 Fax:(303)-772-7039 CLIENT Lafarge PROJECT NAME Observation Wells,35th Avenue Pit PROJECT NUMBER 133-23511-08005 PROJECT LOCATION Iverson,Brown,and City of Greeley Properties DATE/TIME STARTED 12/15/08 15:00 COMPLETED 12/15/08 16:00 GROUND ELEVATION 4688.3 ft HOLE SIZE 8" DRILLING CONTRACTOR Drilling Engineers GROUND WATER LEVELS: DRILLING METHOD 4.25"I.D.Hollow Stem Auger Q AT TIME OF DRILLING 6.50 ft/Elev 4681.80 ft LOGGED BY J.Deuto CHECKED BY G.Linden AT END OF DRILLING --- NOTES Iverson Property,Clear cold,-5 deg F 1 24hrs AFTER DRILLING 2.92 ft/Elev 4685.38 ft COORDINATES 520265 4476923.57 WELL DIAGRAM w F m w co n i O Casing Top Elev:4690.7(ft) 2 • = 0-x O Q O. > a p MATERIAL DESCRIPTION II ww- a0 mO> CO 4 J gJ Stickup Qz Uz (0 co 0 V CLAY:medium stiff,moist,dark brown,sandy,trace organics,(CL) Bentonite G. CL Y o 2-3-7 • ' 10-20 Sand CLLu 5 (10) ce F_ X SS /46.0 4682.3'.'. in 4 SAND:moist to wet,light brown to tan,fine to coarse grained,well to- - graded,some silt,gravelly,(SW) i— ce° w X 7-15-28 10 ^ SS (43) SW '►i�' el z L4y _ Natural Cave Gi • °o - • • �_ _ 14.0 4674.3 m , ' CLAYSTONE:hard,moist,gray,sandy �•,p,• u 15 tl1�'J o 0 1��•1= a- 14-27-48 Li?, - -X SS (75) .4`r 18.5 4669 8 L'ire:* Bottom of borehole at 18.5 feet. tit G. o el o co o IL 0 0 W O 0 0 V) w r z rr w z w I U w g F Tetra Tech WELL TT-MW-09 Ezi1900 South Sunset Street Longmont,Colorado 80501 PAGE 1 OF 1 Telephone:(303)-772-5282 Fax:(303)-772-7039 CLIENT Lafarge PROJECT NAME Observation Wells,35th Avenue Pit PROJECT NUMBER 133-23511-08005 PROJECT LOCATION Iverson,Brown,and City of Greeley Properties DATE/TIME STARTED 12/15/08 09:00 COMPLETED 12/15/08 11:00 GROUND ELEVATION 4688.6 ft HOLE SIZE 8" DRILLING CONTRACTOR Drilling Engineers GROUND WATER LEVELS: DRILLING METHOD 4.25"I.D.Hollow Stem Auger Q AT TIME OF DRILLING 5.00 ft I Elev 4683.60 ft LOGGED BY J.Deuto CHECKED BY G.Linden AT END OF DRILLING --- NOTES Iverson Property,Clear cold,-15 deg F I 24hrs AFTER DRILLING 3.27 ft/Elev 4685.33 ft COORDINATES 519767.6 4477537.6 w WELL DIAGRAM o. H ~w ~j Ui w W = Casing Top Elev:4690.7(ft) o f -12 w 0 Q vii Q w 18 MATERIAL DESCRIPTION I� Q. z c0O-- Stick up Q Cl) 0 ' SAND:moist,dark brown,fine to coarse grained,dayey,organics, q• • 1• Concrete (SC) SC - 3.0 4685.6 0. SAND:dense,moist to wet,light brown to tan,fine to coarse grained, - well graded,some silt,gravelly,(SW) w5 SS 15-27-16 Bentonite a X (43) m cn Hr - La.` :�� L`1 Lt« Lr ? 10 Lim L�'� J cc `.1 �1 p .1111 �.f a _ • • • .•ti L•i W ••N I A.1 OW • • • • la" L•.1 W • • • 06 L i a: .161 .Y o'- - ,L•• :`i CO Cli15 1 1.11 �i. Ir. I-- SW •• ••• iii .v* 1I !1 as- - .''•••I.t. Ii. Cl. 1 to4.7'. S ..•" .•l~qr - �1 �.1 20 '' iv Natural Cave n ,,, fir m- - '`7 iii �i1 ci .......”."-.411� e �wlL f '`11 .�1 m- - Llir�'�.i w f�'LUI 25 LtiCy..,i O - L•rni•.fi xi lirii=gli v- lit 7 TI •••• • iiiayfr ft) •''•' 1 J 1 I-- • 29.0 4659.6 L•i t•'i 30 ` ' SANDSTONE:hard,moist,gray,clayey 21.x`.1 :: ,,,,..L•'f eil z >4 SS ,, 50/5" , .1 31.4 Bottom of borehole at 31.4 feet. 4657.2 "'+- i o x 0 w r g La La LAFARGE MEMORANDUM Date: January 26, 2004. To: Eric Reckentine CC: From: Greg Griffith cf Subject: Northern Due Diligence- Iverson Reserves Jan 2004 13GiGre 4-) On December 8th and 12th 2003, the Iverson property near CR 31 and F Street in Greeley, Weld County, CO was drilled with a 6" hollow stem auger and sampled with a 2" continuous sampler in the lead auger to assess its sand and gravel reserve. V7 Ten (10) holes ere drilled and are illustrated on the attached map. The area of the property is approximately 7 cres. A mineable parcel was created by offsetting a line approximately 100 ft from the bank o e river, as well as, staying off 25 ft from either side of gas pipelines located in the southwest corner of the property. Parcel 1,which is approximately 47.7 acres, is the total mineable area of the property except that area under the gas lines. Parcel 2 is approximately 1.8 acres and is the area under the gas lines and could be mined if the gas lines were relocated. An average sand and gravel thickness of 17.4 feet and an average overburden thickness of 4.5 feet were encountered throughout the property. The volumes for overburden and sand and gravel were calculated in AutoCAD,using the drilling information. No mudseam was encountered on the property that would influence the reserve estimate. The total volumes at the Iverson property are summarized in the tables below. vey�y��{��y� /F v F k � F 3 y�L > fir' y GJ :: 4 vei soiclli iiiii , 'f t 1 0:. 3 ` t 4f£ i `� F,,t�37�...g yp Z� i 3Y v ate..ti i',, i r{�i +"tk sytr� t c= .~ X f t �:. 4� << 7 " d ( r v. -:.`;;P-'‘.'4•1,'.1"4.4.§.-t -13''''''',` ,?' ; Oveeiju le t Mudsea lI.TF:, Parcel =` .Acme ,,, VoIut? ;F C) '�&G Tats, , ..l of olum ( ,. ' "'.`,;(BC C x..,.,.. 1 47.71 1,424,631 2,136,947 323,048 n/a 2 1,77 40,001 60,002 13,325 n/a Total •`49.'4k_ 1,464,632 • \ 'ti-901048.;'':.:::..;;:_i,.. . 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