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Home My WebLink About20041350.tiff CHURCH & Associates, Inc. - ENGINEERS&GEOLOGISTS May 2, 2002 Intermit! Land Surveying, Inc., Attn: Steve Stencel 1301 North Cleveland Avenue Loveland, Colorado 80537 Subject: Revisions to the Engineering Geology Report and Preliminary Percolation Report, Proposed Zadel P.U.D., South 'G Section 10, Township 1 North, Range 67 West of the 6th P.M. Weld County, Colorado Job No. 13811-L Dear Steve, As requested, we have made revisions regarding lot number and sizes to our preliminary percolation report and engineering geology report. The 2 original reports were prepared under our Job No. 13811-L, dated May 30 and May 31, 2001. The original reports indicate the proposed 81.2+-acre subdivision is to divided into 7 rural-residential — lots, ranging in size from approximately 5 acres to 6 acres and an open area of approximately 39 acres. The proposed subdivision has been revised to 9 rural-residential lots, ranging in size from 2 acres to 5 acres and an open area of 48 acres. A roadway is to be constructed to service the 9 proposed lots. If there are any questions or we can be of further service, please call. Sincerely, CHURCH & Associates, Inc. Thomas W. Finley, C P.G. twf, 3 copies sent 2004-1350 DENVER 4501 Wadsworth Boulevard Wheat Ridge,CO 80033 CASTLE ROCK 303 660.4358 303.463.9317 Fax:303.463.9321 EVERGREEN 303.816 1455 LOVELAND 970.663.2124 • CHURCH & Associates, Inc. ENGINEERS& GEOLOGISTS May 31, 2001 Intermill Land Surveying, Inc., Attn: Steve Stencel 1301 North Cleveland Avenue Loveland, Colorado 80537 Subject: Preliminary Percolation Report, Proposed Zadel P.U.D. South % Section 10, Township I North, Range 67 West of the 6`h P.M. Weld County, Colorado Job No. 13811-L Dear Steve, As requested, we have written a preliminary percolation report as required by the Weld County Planning Department. The information provided in our report was based on test hole observations on May 18, 2001 and a site reconnaissance and percolation tests conducted on May 19, 2001 by a Professional Geologist from our office. Percolation tests are to be conducted on at least 20% of the total number of the lots proposed to comply with Weld County Planning Department's requirements -- for lots between 1 acres and 5 acres. PROPOSED DEVELOPEMENT The proposed 81.2+-acre subdivision is to divided into 7 rural-residential lots, ranging in size from approximately 5 acres to 6 acres and an open area of approximately 39 acres, as presented on Figure 1. The exact lot sizes and layouts have not been established. A roadway is to be constructed to service the 7 lots. Domestic water is to be supplied by the Central Weld County Water District. Sewer services are to be constructed on-site for each individual residence. SITE CONDITIONS The site is located southwest of Fort Lupton south of Highway 52 on County Road 19. The subject site consists of non-irrigated, plowed ground. Slope conditions range from 1% to 4% to the west and southwest at the west portion of the site. Slopes are direct towards the east at the east side of the parcel. Drainage along the west side is directed to a 24-inch culvert crossing County Road 19. No structures were observed on the property during this investigation. Three oil and natural gas lines are located at the central and east portions of the property. Oil and gas wells were observed on the surrounding properties. Two exploratory test pits were excavated at selected areas of the site. Two percolation holes were excavated near each profile boring. Percolation test results indicate percolation rates ranging from 60 minutes per inch (MPI) to slower than 240 MPI. The subsurface conditions consist of slightly sandy DENVER 4501 Wadsworth Boulevard Wheat Ridge,CO 80033 CASTLE ROCK 303.660.4358 303.463.9317 Fax:303.463.9321 EVERGREEN 303.816.1455 LOVELAND 970.663.2124 Preliminary Percolation Report Job No. 12811-L Page 2 clay underlain by weathered claystone and firm claystone. No free groundwater was encountered in the profile test pits. OWS FEASIBILITY The subsurface and percolation information provided in the referenced report indicates engineered OWS will be required for most or all of the lots due to slow percolation rates. Evapotranspiration/absorption (ETA) systems are utilized where percolation rates are slow. Large ETA beds and low-pressure drip irrigation (LPDI) systems are applicable for these conditions. LPDI systems are a proven technology and require no more maintenance than a standard system with a lift station. Our observations indicated no lots where OWS would not be feasible. Large ETA beds are more expensive and are difficult to construct on slopes then the LPDI systems. LPDI systems are usually less expensive than the ETA beds and can conform more easily to sloping ground. Typical costs for large ETA beds range from $12,000 to more than $30,000. Typical costs of the LPDI system range from $6000 to $14,000, depending on the percolation rates, number of bedrooms in the home and engineer's design. PUBLIC CENTRAL SEWER FEASIBILITY The nearest Fort Lupton Sanitation District sewer main is more than 2 miles line-of-site to the site. In the event a new sewer main was constructed line-of-site to the project, the cost would be in excess of "" $350,000 based approximate fees provided by a pipeline contractor. A line-of-site sewer is probably not feasible due to easement and property rights. A new sewer would typically be located next to roadway easements and the costs would be substantially more than shown above. CONCLUSION Based on the data presented in this report, the site is not economically feasible to connect the proposed subdivision to a public, central sewer system at the present time. OWS appear to be the most appropriate system for servicing sewers. LPDI systems are proven systems for the site conditions described and are cost effective and relatively low maintenance. If there are any questions or we can be of further service, please call. The project manager for this project is Thomas W. Finley in the Loveland office. Sincerely, CHURCH& Associates, Inc. Edward O. Church, P.E. EOC/twf, 3 copies sent PROPOSED ZADEL P.U.D. SCALE 1° = 400' ,S 1/2 SECTION 10, •. 1 N., R. 67 W. OF THE 6TH P.M. WELD COUNTY, COLORADO TANKS I / C I / I ' TEST PIS I I a j 0 0 re I -may [---- i I 4( I EST PIT I o iII r r '/ U E- I ^. TO4% ./ I S �_E - - I PANHANDLE EASTERN PIPELINE AMOCO PIPELINE PUBLIC SERVICE GAS LINE THE LOCATION OF EXISTING AND PROPOSED IMPROVEMENTS SHOWN HEREIN; AND THE WELL AND/OR DRAIN FIELD LOCATIONS STAKED AT THE SITE; ARE NOT THE RESULT OF A PROPERTY SURVEY. IMPROVEMENT LOCATIONS ARE APPROXIMATE. IT IS THE PROPERTY OWNER'S RESPONSIBILITY TO DEFINE PROPERTY BOUNDARIES AND ENSURE ALL ONSITE IMPROVEMENTS ARE LOCATED WITHIN THE PLATTED SITE AND OUT OF INAPPROPRIATE EASEMENTS. ALL SEPARATION DISTANCES ARE TO BE VERIFIED PRIOR TO EXCAVATION. SITE PLAN AND LOCATION OF JOB NO. 13811-L EXPLORATORY TEST PITS AND FIGURE 1 PERCOLATION HOLES TEST PIT 1 TEST PIT 2 a. - t WC = 9.5 WC = 14A - DD = 110 7- -200 = 84 5 4 / 5 - WC = 19.0 II WC = 19.2 _ _ - i - 101 WC = 16.6 WC = 19.6 10 w -w LL- -LL E 15 15 r w w 0 O EXPLANATIONS: ® TOPSOIL WEATHERED CLAYSTONE,SLIGHTLY MOIST TO MOIST, FIRM, OUVE-GREY CLAY, SLIGHTLY SANDY, SLIGHTLY MOIST ® CLAYSTONE, SLIGHTLY MOIST TO MOIST, TO MOIST, STIFF, BROWN FIRM TO HARD, OLIVE-GREY NOTES: 1. THE EXPLORATORY TEST PITS WERE EXCAVATED ON 5-18-2001 USING A CONTRCTORS BACKHOE. 2. NO FREE WATER WAS ENCOUNTERED AT THE TIME OF DIGGING. 3. WC = WATER CONTENT(96) DD = DRY DENSITY(PCF) -200 = PERCENT OF FINES PASSING THE NUMBER 200 SIEVE. LOGS OF EXPLORATORY TEST PITS JOB NO. 13811-L FIGURE 2 CHURCH & Associates, Inc. Engineers & Geologists Denver Colorado, 303-463-9317 Evergreen Colorado, 303-816-1455 Castle Rock,Colorado 303-6604358 Gradation Test Results #200 #100 #50 #30 #16 #8 #4 3/8" 3/4" 1-1/2" 3" 100.0 _ _ - ;—_ Y 1:79 F.r 90.0 1 ± t1t'TflT 1 II 70.0 - 7 T j rt 1 i' �H 11 x___ 130 40 1 r I ,111 1 {_ r I HI -i! 1° - H4o I , 6thoL a 50.0 -_�— I - -. -{ - I �I-?- ! 'I .__ _ _ : II II 1- 4.+ e 01 d 40.0 1— -__.1_._ - ___: HO '1-11 ___1— ..._ _ t ___t_11rH60 j ' t LI9- ..III � -1 1j__ —. �.y { � � 3' 70 I I li ? I 20.0 — _�_. _r.111 5_—1 1 y ... . 1I. __-_I 1— _ __l— 11. l - 80 I- I uT1 � I �I 4p, II 100 IL ! .{_.T +- I __ —ti -♦- i X11 h90 OA -- L I_i 1.� ' � x 1. �IL�_ I i I 1333 - I i 1l.!' 100 0.01 0-1 I 10 100 Diameter of Particle in Millimeters DESCRIPTION:CLAY, SLIGHTLY SANDY,MOIST, STIFF, BROWN GRAVEL 0% HOLE/SAMPLE TP2 SAND 16% DEPTH 3 FINES 84% LIQUID LIMIT MOISTURE 14.4% PLASTICITY INDEX DRY DENSITY(pet) N/A DATE: 05/01/2002 JOB NAME: INTERMILL JOB NUMBER: 13811-L FIGURE 3 rERCOLATION TEST RESULTS PROPERTY OWNER: JOHN ZADEL PROPERTY ADDRESS: PROPOSED ZADEL PUD LEGAL DESCRIPTION: S 1/2 SECTION 10, TIN, R67W COUNTY: WELD SIZE OF PROPERTY: 81.25 ACRES DIAMETER OF HOLES: 12 INCHES DATE HOLES EXCAVATED: 5-18-01 SOIL SURFACE SCRAPED: YES DATE/TIME OF PRESOAK: 5-22-01 1:30 P.M. AMOUNT OF PRESOAK: 4-5 GAL/HOLE DATE/TIME OF PERC TEST: 5-23-01 9:40 A.M. DEPTH DEPTH PERC PERC DEPTH MINUTES START END CHANGE RATE HOLE (INCHES) (INCHES) (INCHES) (INCHES) (MPI) IA 30 30 21.25 21.25 0.00 30 21.25 21.25 0.00 30 21.25 21.38 0.13 30 21.38 21.38 0.00 240+ IB 36 30 23.13 23.25 0.13 30 23.25 23.25 0.00 240+ 30 23.25 23.38 0.13 30 23.38 23.50 0.13 r 2A 36 30 20.75 21.75 1.00 30 21.75 22.75 1.00 30 22.38 23.13 0.75 30 23.13 23.75 0.63 48 2B 30 30 19.63 19.63 0.00 30 19.63 19.63 0.00 30 19.63 f9.63 0.00 30 19.63 19.63 0.00 240+ ENDED TESTS EARLY DUE TO SLOW PERCOLATION RATES AVERAGE PERCOLATION RATE = 240+ MPI Sheet 1 of 1 JOB NO. 13811-L TABLE 1 CHURCH & Associates, Inc. ENGINEERS& GEOLOGISTS ENGINEERING GEOLOGY REPORT FOR ZADEL P.U.D. S 'A OF SECTION 10, TOWNSHIP 1 NORTH, RANGE 67 WEST OF THE 6771 P.M. WELD COUNTY, COLORADO Prepared for: INTERMILL LAND SURVEYING, INC. 1301 NORTH CLEVLENAD AVENUE LOVELAND, COLORADO 80537 JOB NO. 13811-L MAY 30,2001 DENVER 4501 Wadsworth Boulevard Wheat Ridge,CO 80033 CASTLE ROCK 303.660.4358 303.463.9317 Fax:303.463.9321 EVERGREEN 303.816.1455 LOVELAND 970.663.2124 TABLE OF CONTENTS SCOPE PROPOSED DEVELOPMENT SITE CONDITIONS INVESTIGATION SITE GEOLOGY 2 MINERAL RESOURCES 3 GEOLOGIC HAZARDS 4 GEOLOGIC IMPACTS ON DEVELOPMENT 4 LIMITATIONS 5 LIST OF REFERENCES 6 FIGURE 1 -VICINITY MAP FIGURE 2-GEOLOGIC MAP FIGURE 3-MAP OF SAND, GRAVEL AND QUARRY AGGREGATE RESOURCES FIGURE 4-EXTENT OF MINING -GEOLOGIC HAZARD MAP FIGURE 5- SOIL SURVEY MAP FIGURE 6 - SITE PLAN, SITE GEOLOGY AND LOCATION OF EXPLORATORY TEST PITS FIGURE 7-LOGS OF EXPLORATORY TEST PITS FIGURE 8 -SWELL-CONSOLIDATION TEST RESULTS FIGURE 9-GRADATION TEST RESULTS SCOPE As requested, we have conducted this engineering geology report for the subject site. The purpose of our investigation was to identify site conditions regarding area suitability for the proposed development as requested by the Weld County Planning Department. PROPOSED DEVELOPMENT The 81.2±-acre parcel is located in part of the South Half of Section 10, T. 1 N., R. 67 W. of the 6th P.M. It is proposed to divide the parcel into 7 rural-residential lots,ranging in size from approximately 5 acres to 6 acres and an open area of approximately 39 acres, as presented on Figure 6. A roadway is to be constructed to service the 7 lots. Domestic water is to be supplied by the Central Weld County Water District. Sewer services are to be constructed on-site for each individual residence. SITE CONDITIONS The site is located southwest of Fort Lupton south of Highway 52 on County Road 19. The subject site consists of non-irrigated, plowed ground. Slope conditions range from 1% to 4% to the west and southwest at the west portion of the site. Slopes are direct towards the east at the east side of the parcel. Drainage along the west side is directed to a 24-inch culvert crossing County Road 19. No structures were observed on the property during this investigation. Three oil and natural fps lines are located at the central and east portions of the property. Oil and gas wells were observed on the surrounding properties. INVESTIGATION This investigation was conducted by means of a site reconnaissance, test pit observations and percolation tests conducted on May 18 and 19,2001 by the author of this report,a Professional Geologist as defined under House Bill 1574. Readily available maps and literature by the Colorado Geological Engineering Geology Report Job No. 13811-L Page 2 Survey and US Geological Survey were also reviewed for this preliminary evaluation. Refer to the attached List of References. SITE GEOLOGY The area lies along the east fringe of the Colorado Piedmont Section of the Great Plains Physiographic Province. The Colorado Piedmont is an elongated trough situated adjacent to the Front Range. As mountain uplifting occurred in Laramide times, increased stream energies at the foot of the mountains resulting in erosion and scouring,creating the Piedmont. The site also lies in the Denver Basin, a thick accumulation of Mesozoic sediments, which have been producers of fossil fuels. The Boulder- Weld Coal Field is located west of the property. Surficial soils at the site consist of clay with silt and sand. The Soil Conservation Maps indicate the majority of the upper clay, sand and silt are eolian (wind-blown) deposits. Minor mixed eolian/alluvial (water deposited) soils and residual (derived form the underlying bellrock) soils are described along the north and west sides. The clay was encountered to 4 feet in Test Pit I to 7.5 feet in Test Pit 2. The soil is moist, stiff having moderate strength characteristics. A sample of the upper clay exhibited low swelling when wetted. The Soil Conservation Service (SCS) maps indicate 4 general soil types; the Cascajo gravelly sandy loam, Renohill clay loam, the Ulm clay loam and the Wiley-Colby complex. The Cascajo gravelly loam is alluvial. The Wiley-Colby complex is eolian. The Renohill clay loam is residual, or derived from the underlying shale and claystonc. The Ulm clay loam is mixed alluvial and eolian. The Wiley-Colby complex appears to be the dominant soil type. The SCS tables for the Cascajo gravelly sandy loam suggest severe limitations for building site development due to caving slopes and severe limitations for septic tank/absorption fields. The tables for the Renohill clay loam suggest moderate limitations for building site development due to shrink-swell soil and severe limitations for septic tank/absorption fields Engineering Geology Report Job No. 13811-1 Page 3 due to slow percolation. The tables for the Ulm clay loam suggest severe limitations for building site development and for septic tank/absorption fields due to rock depth, shrink-swell soils and slow percolation. The tables for the Wiley-Colby complex suggest moderate limitations for building site development and for septic tank/absorption. The referenced geologic map indicates eolium of Quaternary age underlies the west side of the property and the Laramie Formation of Cretaceous age underlies the central and east areas. Refer to Figures 2 and 6. The eolium is described as silt sand and clay deposited by wind. Weathered bedrock of the upper Cretaceous Laramie Formation (K1) was encountered in the test pits. The KI is described as grey claystone, shale, sandy shale and coal and sandstone layers. This is consistent with our observations. Refer to Figure 7. The Laramie Formation extends to several hundred feet in this location. No outcrops of the Laramie Formation were observed on the property. Some shale of the Pierre Shale are known to exhibit swelling characteristics when wetted, possibly affecting overlying structures. Our observations and preliminary tests suggest the claystone will have swell potentials ranging from low to high. Although no faults were delineated on the property, faulting has been described less than one mile west of the site in the Boulder-Weld Coal Field. No free groundwater was encountered in the test pits. No evidence of a maximum seasonal groundwater level was observed. MINERAL RESOURCES Colorado Geological Survey(CGS) Special Publication 5-B and the referenced geologic map and the test hole data from this report were reviewed as the primary references for the preliminary evaluation of sand, gravel and quarry aggregate resources and field verified by the geologist. The geologic map and CGS publication indicate that this parcel does not lie in any floodplain or stream terrace. Minor upland deposits were described adjacent to and partly on the site. Refer to Figures 2 and 3. Due to the lack of Engineering Geology Report Job No. 13811-L Page 4 aggregate resources, it is our opinion that this property is not economical for commercial extraction of sand,gravel or quarry aggregate. Oil/gas wells were observed on the surrounding properties. GEOLOGIC HAZARDS The Extent of Mining Maps from the Colorado Department of Natural Resources—Frederick Quadrangle — by Amuendo & Ivey indicates the site is located outside of the Boulder-Weld Coal Field. No risk of coalmine subsidence is anticipated based on these maps. No signs of recent or past slope movement were observed. Based on this information, it is our opinion that there are no significant geologic hazards caused by gravity on the property. Man-made activities, such as deep excavations, may create conditions which could result in gravity-caused geologic hazards. GEOLOGIC IMPACTS ON DEVELOPMENT The interaction of the proposed development and the geology of the site will depend on the types of structures proposed and specific geologic influences. The primary structures to be built are building foundations, roadways and onsite wastewater systems(OWS). The upper clay exhibits swelling when wetted and may impose pressures to building foundations. The claystone and shale observed also exhibits characteristics of swelling soils. Site-specific geotechnical investigations are recommended for each structure to determine soil strengths, swell potentials and groundwater levels and to provide recommendations for structural design. In the event that the roadway is to be paved,a geotechnical investigation is recommended so that the pavement structure can be designed for the appropriate soil and traffic conditions. Excavations for foundations, utilities and other structures may need to be protected from caving. Refer to OSHA standards for the appropriate protection methods. Our percolation tests indicate slow percolation rates in the soil for placement of septic _,/stems. Site-specific percolation investigations for OWS are required by the County Health Engineering Geology Report Job No. 13811-L Page 5 Department prior to issuance of a building permit. Engineered OWS are anticipated for most or all of the lots. A low-pressure drip irrigation system is a cost effective OWS for slow percolating soil conditions. The site observations and hazard map did not indicate signs of geologic hazards caused by gravity, such as landslides, debris flows, rock fall, or unstable or potentially unstable slopes. Man- made activities could produce conditions, which may result in hazardous conditions, if not carefully planned. No geologic hazard mitigation is anticipated for this site. LIMITATIONS This study was preliminary in nature and did not include an extensive exploration program for the presence of oil, natural gas, uranium or other mineral resources. Based on existing maps, literature and field data potential sand, gravel and quarry aggregate resources are not believed to exist in economic quantities. Although no geologic or soil hazards appear to exist in the present condition, site-specific geotechnical and onsite wastewater investigations should be conducted for each lot. If we can be of further service in discussing the contents of this report, or to conduct site-specific investigations, please call. CHURCH&Associates, Inc. e( !7 ` of PROFEgB‘14,14 '-C. �- a.�zFGATE 48):47e„.4 Thomas W.Finley, .P.G. ?i;�We 10516 r-I twfOr•� •�5� 3 copies sent 4 ,y11/4s 4•t Vest? iryiupi orrssZt- Engineering Geology Report Job No. 13811-L Page 6 LIST OF REFERENCES Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Johnson, Erin J., and Himmelreich, John W. Jr., 1998, Geologic Hazards Avoidance or Mitigation: Colorado Geological Survey Information Series 47 Shelton, David C., Rogers, William P., 1987, Environmental and Engineering Geology of the Windsor Study Area, Larimer and Weld Counties, Colorado: Colorado Geological Survey Environmental Geology 6 Colton, Roger B., 1978, Geologic Map of the Boulder-Fort Collins-Greeley Area, Colorado: U.S. Geological Survey Map I-855-G Schowchow, S.D, Shroba,R.R., and Wicklein, P.C., 1974,Atlas of Sand, Gravel, and Quarry Aggregate Resources Colorado Front Range Counties: Colorado Geological Survey Special Publication 5-B Rogers, W.P., Ladwig,L.R.,Hombaker, A.L., Schowchow, S.D.,Hart, S.S., Shelton, D.C., Scroggs, D.L., and Soule, J.M., 1979, Guidelines and Criteria for Identification of Land-Use Controls of Geologic Hazard and Mineral Resource Areas, Colorado Geological Survey Special Publication 6 , 1980, Soil Survey of Weld County, Colorado- Southern Part: U.S. Department of Agriculture Soil Conservation Service 1981, Extent of Mining Map, Amuendo and Ivey for Inactive Mine Reclamation Program, Colorado Department of Natural Resources Drawing No. 8007-1 PROPOSED ZADEL P.U.D. SCALE S 1/2, SECTION 10 1 : 100,000 TOWNSHIP 1 NORTH, RANGE 67 WEST -- of the 6th P.M. It WELD COUNTY COLORADO N I 7 i 1 -4-:::7‘I'- t 1. ro C. 1 , 0 I 1 f�l czle , �j. tl' —i 2,FJ " I ti 'ill r�ly' Al i. . , I • ;.. < SITE • it)1 _ -, ,� VICINITY MAP JOB NO. 13811-L FIGURE 1 PROPOSED ZADEL F.U.D. SCALE S 1/2, SECTION 10 1 : 100,000 TOWNSHIP 1 NORTH, RANGE 67 WEST ik of the 6th P.M. WELD COUNTY COLORADO ....—mss - . , 0'63 'f::: - Saud Lake �� ' J D: 1 / ,j Erandtoon: Lit- KI( �-1 - I L. vjo '•� "Fred.•. k : • : o o� I .:.? . i 1 J .-1 I' • {1:D . - •levels OricH ,._J/ ( F -' I L%•l Jyy f, 11 •Tin ' 1�11 1 • \5031.. I 1�.� Dace ,a Y. . .... ..:..r '1 sT; ark Bielj • 1 �..• l 6 1 11�)H A. Lr I I. I i J I a. sue Orr ITE Q: ' sF .J , j / 515 O®� n e".2"" J I I train 7i : • .._Oi- ( „1„e p Ij •Pw Iv I b!P.ct . 5060 (15381 f Qe Upp li Qb n .' .. .- . QE-EOLIUI -WIND-BLOWN CLAY, SILT AND SAND 0B-BROADWAY ALLUVIUM-SAND & GRAVEL QPC -PREY CREEK ALLUVIUM -Hunk,SANDY AND GRAVELLY ALLUVILM 0RF-ROW!FLATS ALLUVIUM -COARSE. roar SORTED, POORLY TO WELL-STRATIFIED GRAVEL QV-VERDOS AULNIIR7 -BROWN SAND& GRAVEL KL- LARNIIE FORMATION- GREY CIAYSTOIE, SHALE,SANDY SHALE, COAL&SANDSTONE BASED ON: GEOLOGIC MAP OF TIE BOULDER-Farr COL INS-GREE EY AREA, COLORADO(USGS MAP I-855-G) AND SITE EVALUATION CONDUCTED BY THIS OFFICE GEOLOGIC MAP JOB NO. 13811-L FIGURE 2 PROPOSED ZADEL , .J.D. SCALE S 1/2, SECTION 10 1 :37,500 TOWNSHIP 1 NORTH, RANGE 67 WEST of the 6th P.M. WELD COUNTY COLORADO N I _ ----,�c::77 4: ..1 C)�! / i ' -,c---N ._... I,_f , _ as j 1 // �$ ith �� a/ �' car cJ 14:T . l\ I J ') J J 6� 16 ;PC-----INSSJ: -". 17" 51 ) / 7:1‹: \---1 r-ftee—j- U - UPLAND DEPOSITS V -VALLEY Pus DEPOSITS I - GRAVEL' RELATIVELY CLEAN,SOUND 2 - GRAVEL' SIGNIFICANT FINS, DECOMPOSED ROCK, CALCIUM CARBONATE 4 -PROBABLE AGGREGATE RESOURCE BASED ON: ATLAS OF SAND, GRAVEL El QUARRY RESOURCES -COLORADO FRONT RANGE COUNTIES COLORADO GEOLOGICAL SURVEY SPECIAL PUBLICATION 5-B(1974) MAP OF SAND, GRAVEL &QUARRY AGGREGEATE RESOURCES JOB NO. 13811-L FIGURE 3 PROPOSED ZADEL r.U.D. SCALE S 1/2, SECTION 10 1' = 2000' TOWNSHIP 1 NORTH, RANGE 67 WEST ofthe6thP.M. WELD COUNTY COLORADO N I \t' cs. -7--z / .. `. / if ) 0 �/ ''r', jam) �_7 _ '� y '� �f ��/� � / �' {y ��0444 r /.., f � d / CC o ) L �SiTe• f -.S. �f _/../ ./ •�1.� �,`. /r 1:1 r,�l• 1, • ,'---\--. ty id\ • °J 1". ' � "' � ��: °�r 1I\ t \ . > 5 7 / . T r qg )/4� " \ ( a.. ,�, _ / r O COAL-UNDERGROUND MINE ,•-- FAULT -DASHED WHERE INFERRED THIS MAP IS BASED ON'EXTENT OF MINING MAP-COLORADO DEPARTMENT OF NATURAL RESOURCES-BY AMLENDO AND IVEY EXTENT OF MINING - GEOLOGIC HAZARD MAP JOB NO. 13811-L FIGURE 4 PROPOSED ZADEL r.U.D. SCALE S 1/2 SEC11ON 10 1" = 2000' TOWNSHIP 1 NORTH, RANGE 67 WEST of the 6th P.M. I1 WELD COUNTY COLORADO N I r 66.. �a� 78 •y- ` �.. ;34' 3 i•7 U ` 1,. 5 h 82 • ' 082 r,': C Creek ,,: tu. + I .{¢7 83 . 57 • S(.:, t 66 ' 83 cti ei J. 66 '...� 82 13 ..--.` 79 °+ ) + 67 • r+, 13 85f r _ r... • P 82 ":_4,,, i5l,;l,• : OJ r i. Y YK JJ gg e ' 57 • :I:' 79 ' .t 4,' SITE 82 / .,j f. " 1 66 13 flSt82 67 83 57 J " . � 15 , n� r-...... KEY 13 -CASCP JO GRAVELLY SANDY LOAM, 5%TO 20%SLOPES 57 -RENOMLLL CLAY LOAM -3%TO 9%SLOPES 66 - U.M CLAY LOAM - 0%TO 3%SLOPES 83-WLLEY-COLOY COMPLEX-3% TO 5%SLOPES SOIL SURVEY IS BASED ON USDA SOIL SURVEY OF WELD COMITY, COLORADO SOIL SURVEY MAP JOB NO. 13811-L FIGURE 5 PROPOSED ZADEL P.U.D. SCALE S 1/2 SECTION 10, 1' = 400' T. 1 N., R. 67 W. OF THE 6TH P.M. 'ELD COUNTY, COLORADO TANKS ,O 00 i - - a - 88 - C t t I' / ; " I ' QE TEST 'I / ' 0. 11 KL / z EST IT I i I D QE I C I '. T 4% f KL S rEE I PANHANDLE FA-STERN PI LINE AMOCO PIPELINE PUBLIC SERVICE GAS LINE REFER TO FIGURE 2 FOR DESCRIPTION OF GEOLOGIC SYMBOLS THE LOCATION OF EXISTING AND PROPOSED IMPROVEMENTS SHOWN HEREIN; AND THE WELL AND/OR DRAIN FIELD LOCATIONS STAKED AT THE SITE; ARE NOT THE RESULT OF A PROPERTY SURVEY. IMPROVEMENT LOCATIONS ARE APPROXIMATE. IT IS THE PROPERTY OWNER'S RESPONSIBILITY TO DEFINE PROPERTY BOUNDARIES AND ENSURE ALL ONSITE IMPROVEMENTS ARE LOCATED WITHIN THE PLATTED SITE AND OUT OF INAPPROPRIATE EASEMENTS. ALL SEPARATION DISTANCES ARE TO BE VERIFIED PRIOR TO EXCAVATION. SITE PLAN, SITE GEOLOGY AND JOB NO. 13811-L LOCATION OF EXPLORATORY TEST PITS FIGURE 6 o TEST PIT 1 TEST PIT 2 WC = 9.5 • WC = 14.4 DD = 110 -200 = 84 - 5 5 ' WC = 19.2 WC = 19.0 // 10 %1 WC = 16.6 l WC = 19.6 10 w w LL- -LL 15 15 E w w ci O EXPLANATIONS: ® TOPSOIL ® WEATHERED CLAYSTONE, MOIST, FIRM, OLJVE-GREY jCLAY,SLIGHTLY SANDY, MOIST, CLAYSTONE, MOIST, ARM TO HARD, STIFF, BROWN SLIGHTLY NOTES: 1. THE EXPLORATORY TEST PITS WERE EXCAVATED ON 5-18-2001 USING A CONTRCTORS BACKHOE. 2. NO FREE WATER WAS ENCOUNTERED AT THE TIME OF DIGGING. 3. WC = WATER CONTENT(%) DD = DRY DENSITY(PCF) -200 = PERCENT OF FINES PASSING THE NUMBER 200 SIEVE. LOGS OF EXPLORATORY TEST PITS FIGURE 7 JOB NO. 13811-L 8 b 5 0 4 3 2 _ . . 1 EXPANSION UNDER CONSTANT PRESSURE DUE TO WETTING 0 -1 y .N.Nstat\: -2 •� -3 O -5 -6 -7 -8 0.1 1 10 100 APPLIED PRESSURE-ksf Sample of Clay from TP 1 @ 3' Natural Dry Unit Weight = 110 PCF Natural Moisture Content= 19.5% JOB NO. 13811-L SWELL-CONSOLIDATION TEST RESULTS FIGURE 8 CHURCH & Associates, Inc. Engineers & Geologists Denver Colorado, 303-463-9317 livapmn Colorado, 303-816-1455 Castic Kock,Colorado 303-660-4358 Gradation Test Results #200 #100 #50 #30 N16 N8 1/4 3/8" 3/4' 1-1/2"loom r 3' 90.0 10 840 70.0 -a 5 60.0 -- ._ __ ___ _ —_ _._40 I � a 50.0 50 E V 60 30.0 - — --- — 20.0 -_ _ 10.0 - _i _ . — 90 100 0.0I (II I 10 100 Diameter of Particle in Millimeters DESCRIPTION:CLAY,SLIGHTLY SANDY,MOIST, STIFF, BROWN GRAVEL 0% HOLE/SAMPLE TP2 SAND 16% DEPTH 3 FINES 84% LIQUID LIMIT MOISTURE 14.4% PLASTICITY INDEX DRY DENSITY(pcf) N/A DATE: 05/29/2001 JOB NAME: INTERMILL JOB NUMBER: 13811-L FIGURE 9 Hello