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Home My WebLink About20002629.tiff F. 1 CHURCH & Associates, Inc. /^ ENGINEERS&GEOLOGISTS May 24, 2000 Intennill Land Surveying, Inc. Attn: Jim Bunkers 1301 North Cleveland Avenue Loveland, Colorado 80537 Subject: Mineral Resource Statement and Preliminary Soil Evaluation Lot A, in the Proposed Exemption No. 2464, A Portion of the North Half of Section 6, Township 2 North, Range 62 West of the 6th P.M. Weld County, Colorado Job No. 12688-L Dear Jim, SCOPE As requested, we have conducted a preliminary geological and geotechnical evaluation for the subject site. The purpose of our investigation was to identify site conditions and to evaluate whether there is the presence of economically extractable mineral resources (specifically sand, gravel and quarry aggregate) and discuss the soil conditions as they relate to development of the site. This information is requested by the Weld County Planning Department to facilitate a change in land use zoning of the subject property from A(agricultural)to C-3 (commercial). INVESTIGATION This investigation was conducted by means of a site reconnaissance conducted on May 23, 2000 by a Professional Geologist. We also reviewed readily available maps and literature. by the Colorado Geological Survey and USDA Soil Conservation Service. SITE CONDITIONS The site is a 10.02+ acre lot located in a rural area in northwest of Roggen in Weld County, Colorado. The parcel consists of non-irrigated, vacant land, which is currently, or recently in the past, used as pasture for livestock. There is an approximate 0% to 1% slope at the south portion of the lot, generally to the south with minor variations in slope direction. The slopes at the north portion of the lot are slightly steeper, in the order of 1% to 4% with small, ancestral dunes. The lot is a sparsely to moderately covered with grasses and weeds at the proposed field. A thin layer of topsoil appears to te".N overlie fine, silty sand. 2000-2629 , 1401 DENVER 4501 Wadsworth Boulevard Wheat Ridge,CO 80033 57 Hit o #, 303.463.9317 Fax:303.463.9321 t. rfINN M1NERAL/SOIL Job No. 12688-L Page 2 PROPOSED USAGE At this time, the specific usage of the lot has not been determined. We anticipate that new structures will require permanent foundations and on-site wastewater systems (OWS). It is unclear if drinking water will be supplied by a local water district or onsite wells. SOIL EVALUATION The soil survey map provided by the USDA Soil Conservation Service indicates that the south portion of the site is underlain with the Osgood sand and the north portion underlain with the Valent sand. Both are wind-blown (eolian) soils with rapid permeability and low hazard for wind and water erosion. These sands are described as having slight limitations for septic tank absorption fields and severe limitations for shallow excavations due to potential caving of cut-banks. MINERAL RESOURCE STATEMENT Not all mineral resources were evaluated for the property. The primary concerns, as we understand, are potential sand, gravel and quarry aggregate resources, which may conflict with development. Colorado Special Publication 5-B was used as the primary reference for this preliminary evaluation and field verified by the geologist. Based on that document, the south side of the site lies within V-4 deposits, valley fill deposits, a probable aggregate resource. We observed no gravel mining operations in the vicinity. We observed no evidence of natural occurring aggregate exposed at the surface on the property. Based on the small amount of property lying within this potential deposit, lack of mining in the vicinity and relatively small size of the lot, it is our opinion that there are no r economically extractable aggregate resources on the site. MINERAL RESOURCE STATEMENT 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 not described above. No extractable mineral resources covered in this report are believed to be present at this site. Although no geologic or soil hazards appear to exist in the present condition, site specific geotechnical and onsite wastewater investigations should be conducted as planning of the project proceeds. If there are any questions or we can be of further service, please call. Sincerely, CHURCH & Associates, Inc. Reviewed by: ;y�' ' °cogs to • Thomas W. Finley Edward O. Church, P. rS '`;"' Professional Geologist : a TWF 3 copies sent LOT A, RECORDED r a ` PTION 2464 SCALE u p a our.'of tithe Worth Half of 8eotlon 6 1' = 2'00 Township 2 kN ""oath; Raf9s"63'West 1 f� of the 6th Dm., WELD COUNTY COLORADO N I J 1. n C: � ....� o �,. ISil � o z I --�til / J 0, I 1.., M t ;a r, a J �_ 1 L9t A ' �r t '/ % /. �% / Lot f1 . ti M f I I V. L • r e-�:•mot rt)XSRor}9nn 4,f a7r i I a'aD d .r S. ''A v • • s%':nary ....^ �'-.�` y U Ors U } 3I H . i , Tip. co �l �� ✓-Iti (,`� \1 Pc ( ( 7 i r{ o 3 { /) N (..1\.: im. R.62 W. I R.63 W. —_ I U , r-, 0 •Y14h VICINITY MAP BASED ON PLAT BY INTERMILL LAND SURVEYING # P-99-4256 • VICINITY'MAP r JOB NO. 12688-L FIGURE 1 ' LOT A, RECORDf ,J1EMPTION 2464 /"'-'1 SCALE Portion of the North Half of Section 6 1.:37,600 Township 2 North, Range 62 WestPi of the 6th P.M., WELD COUNTY COLORADO ,r^` N I �ih.V^ i 1 •, N.. � ' O1 'JD < \ ^�r 1. 1 ('/' -v ,� i ^ G 0 < yj{ - a - �\ . _Y-r--- ;;° .' 4� ;�4F4fl a �ll C� T n ( s>" il . ` O<,n ,(�.),\SI W'apt 1 � ' d i am 5 r, l`l . �»m -\c ;\.,„ 0 llpl ) -, 1 :rLt :9 '''''',...to r-- , n, t % ii V4 �,., C �, •, sl rj E3 1� C �". } JD y. e .c /' b V4 i , / A ,>� 1. \...^l� c 1 I° i 7I PAcFD ON: ATLAS OF SAND,GRAVEL 8 QUARRY RESOURCES -COLORADO FRONT RANGE COUNTIES -COLORADO GEOLOGICAL SURVEY SPECIAL PUBLICATION 5-B MAP OF SAND, GRAVEL & QUARRY AOGiREOiEATE RESOURCES EN JOB NO. 12668-L FIGURE 2 LOT A, RECORDMPTION 2464 r""""1 SCALE Portion of .the North Half of 1' = 2000' Seotlon 6, Township 2 North, Range 62 West of the 8th P.M., WELD COUNTY COLO s ` I 5'O es"\ N I fti y yr 1y 4� .a '� YY�tiy tic**. a r V'a4, w4 !cc(1. � :Piker' 1'q norY 9 �. n 41441 Yyd K ri '„k e A 4 '1 YF ,w° P. 70 TT•• y�y,�pa Y La'� r 7 44 b;CIF ' r « r., , 49 ,yr h ri i '0 r 70 S eCNB. � l S A JG ;ss 1 0�` ' IT, aRropi^rvY '.iC' '4°.;wn', CUB , r ` a-,; tie s 4.."G s P ,.<Sk div7 49 -�.r.c visumns �t � 1 i+4 l !�nom"" :"'z he ,' , R,. `.`^' C, Y y� ew 1 V =4:;=?;? „, = ' ic,\":_.:_...- 49 f Y yr,,,',.41, ,;,,,,1%=.4 7sk. r 69% I' ` k ,4' t ;4k >� 1 {fi pp ry 'fvk l +yt SOIL SURVEY IS BASED ON USDA SOIL SURVEY OF WELD COUNTY. COLORADO AND SITE EVALUATION CONDUCTED BY THIS OFFICE. SOIL SURVEY MAP r JOB NO. 12686-L FIGURE 3. 102 SOIL SURVEY I N r TABLE 6.--BUILDING SITE DEVELOPMENT--Continued ' Soil name and Shallow Dwellings 1 Dwellings Small Local roads t a%ap symbol excavations without ; with commercial and streets � . ( basements ; basements ; buildings �, _. __ _r i I —r— N 44 ---- Slight Slight ;Slight ;Slight ;Moderate: II Olney I ; low strength. L 45 ---- Slight Slight ;Slight ;Moderate: , ;Moderate: Olney ; slope. ; low strength. 1 ; I 46, 47 ---- Slight Slight ;Slight ;Slight ;Moderate: 4 Olney low strength. 1 48 ---- Slight Slight ;Slight ;Moderate: ;Moderate: Olney ; slope. ; low strength. 49 ---- Severe: Slight ;Slight ;Slight ;Slight. Osgood cutbanks cave. 50, 51 .---- Slight Slight ;Slight ;Slight ;Slight. Otero 52, 53 --- Slight Slight ;Slight ;Moderate: ;Slight. Otero ; slope. 54 ----- Slight Severe: ;Severe: ;Severe: ;Moderate: Paoli floods. ; floods. ; floods. ; low strength, frost action. r 55----- • Slight Slight ;Slight ;Slight ;Moderate: y Paoli ' low strength, frost action. ) 56 ----- Moderate: Moderate: ;Moderate: :Moderate: ;Severe: Renohill depth to rock, low strength, I low strength, ; low strength, I low strength, .i. too clayey. , shrink-swell. ; depth to rock, ; shrink-swell. I shrink-swell. • ; shrink-swell . r. 57(....- ----- Moderate: ;Moderate: ;Moderate: Moderate: ;Severe: Renohill depth to rock, , low strength, low strength, slope, low strength, too clayey. shrink-swell. ; depth to rock, low strength, shrink-swell. ; shrink-swell. shrink-swell. a 58, 59 .---- Severe: Severe: ;Severe: Severe: Severe: Shingle depth to rock. depth to rock. ; depth to rock. depth to rock. depth to rock. 60•: Shingle .---- Severe: Severe: ;.Severe: Severe: Severe: depth to rock. depth to rock. ; depth to rock. depth to rock . depth to rock. Renohill ---- Moderate: Moderate: ;Moderate: Moderate: Severe: depth Co rock, low strength, low strength, slope, low strer, Ai, too clayey. shrink--;well . depth to rock , Low strength , shrink-s •:ll. ; shrink-swell . shrink-swell . 61 Moderate: Moderate: ;Moderate: Severe: Moderate: Tassel depth to rock. depth to rock. depth to rock. ;lop? . depth to rock. 62 Severe: Moderate: Severe: Moderate: Moderate: Terry depth to rock. depth to rock . depth to rock. depth to rock. depth to rock. 63 ----;Severe: Moderate: Ilevere: Moderate: Moderate: Terry depth to rock. depth to rock. depth to rock. depth CO rock, depth to rock. • slope. 64 ----;Moderate: Moderate: Moderate: Moderate: Moderate: Thedalund I depth to rock. low strength. depth to rock. low strength. low strength. 65 ;Moderate: Moderate: ;Moderate: Moderate: Moderate: Thedalund I depth to rock. low strength. depth to rock . low strength , low strength. .lope. /tae footnote at end of table . WELD COUNTY, COLORADO, SOUTHERN PART 103 TABLE 6.--BUILDINC SITE DEVELOPMENT=-Continued Soil name and ; Shallow Dwellings ; Dwellings ; Small Local roads map symbol excavations 1 without : with ; commercial ; and streets basements ; • buildings rngs ; I r- 66, 67---- ;Moderate: :Severe: ;Severe: :Severe: :Severe: Ulm ; too clayey. : shrink-swell. ; shrink-swell. : shrink-swell. ; low strength, : shrink-swell. i 68r ,Severe: :Moderate: :Moderate: ;Moderate: :Moderate: Ustic small stones, : slope. ; slope. slope. slope. Torriorthents : cutbanks cave. ; ' I '- ' 69 :Severe: ;Slight. :Slight :Slight :Slight. Valent cutbanks cave. : I 70 _ :Severe: Slight ; ;Slight ;moderate: Slight. Valent ; cutbanks cave. : ; slope. 71': ; ' :Slight Slight ;Moderate: ;Slight. Valent--•- :Severe: g ; slope. cutbanks cave. ; ;Severe: Severe: Severe: Loup ;Severe: :Severe: wetness. : wetness, : wetness, wetness, ; wetness, cutbanks cave. : floods. : floods. , floods. ;Slight :Slight :Moderate: 72 Slight .Slight B ; low strength. i Vona ' 73, 74 ,Slight :Slight ;Slight :Moderate: :Moderate:slope. : low strength. ,,i, Vona ' ; : 75, 76 ;Slight :Slight ,Slight :Slight ;Moderate: low strength. Vona ' : /""1, 77 :Slight :Slight ;Slight :Moderate: ;Moderate: f 1 slope. low strength. + Vona , 78, 79 ;Slight :Moderate: :Moderate: Moderate: :Moderate: Weld ; ; low strength, : low strength, low strength, : low strength, shrink-swell . ; shrink-swell . shrink-swell . shrink-swell , :Sli ht ;Moderate: :Moderate: :Moderate: :Moderate: 80 g ' low strength, I low strength, ; low strength, Weld : low strength, ; shrink-swell, shrink-swell. ; shrink-swell. ; slope, 4 shrink-swell . frost action. , Si' B2': ; : ' ;Moderate: Wiley--_. :Slight ;Moderate: :Moderate: :Moderate: ; ; low strength, ; low strength, ; low strength, : low strength, : shrink-swell. : shrink-swell . 1 shrink-swell.. ; shrink-swell. ' :Slight :Moderate: Colby- ;Slight :Slight ,Slight low strength. - : , : '831: ' :Moderate: ,Slight :Moderate: Moderate: :Moderate: Wiley- ' : low strength, : low strength, : low strength, ; low strength, ` I ; shrink-swell . I shrink-swell. 1 slope, : shrink-swell . shrink-swell . Slight :Moderate: ;Moderate: Colby ,Slight ;Slight : slope. 1 low strength.e. * See map unit description for the composition and behavior of the map unit. 106 SOIL SURVEY TABLE 7.--SANITARY FACILITIES--Continued — I --- -- r--- --------- ---- -- ,_�--------__..--- _— I Area i)Daily cover Soil name and : Septic tank Sewage lagoon , Trench map symbol : absorption areas : sanitary : sanitary for landfill fields — : landfill ; landfill �__.-_____ . - --_-- --- ---r �-----�.._._---- : , ;Severe: Moderate: :Slight :Slight ;Fair: 43 : too clayey. peres slowly. , excess humus. : ' Nunn + Severe: :Slight :Slight ' :Good. 44 45, 46 47, 48--;Slight : , Olney I : seepage. I ' —__.—_' :Severe: ;Severe:p ;Severe: :Fair: 49 ,Slightseepage.Osgood , ; seepage. : seepage. p be• ; too sandy. : I ;Good.. :Slight ;Severe: ;Slight :Slight Otero : : seepage. : 53 :Slight :Severe: :Slight :Slight :Good. Otero slope, : 1 ; seepage. I ;Good. 5r :Slight ;Severe: :Severe: :Severn: ; Paoli ; : seepage. : seepage. : seepage. I I : ,Severe: :Severe: :Severe: :Good. 55 ,Slight seepage. , seepage. seepage. I Paoli ,; : : : 56,. 57 :Severe: Severe: :Severe: :Slight :Fair: eres' slowly, , depth to rock. : depth to rock. : : too clayey, Renohill + p c+ : thin layer. : depth to rock. : ' , : ' 'Severe: :Slight ,Poor: 58, 59 ;Severe: ;Severe: � � ; thin layer. Shingle ; depth to rock. : depth to rock. : depth to rock. WI: Poor Shingle :Severe: Severe: :Severe: :Slight : thin : layer. : depth to rock. I depth to rock. : depth to rock. : 4 I I Severe: :Severe: :Slight Fair: Renohill :Severe: too clayey, percs slowly, depth to rock. , depth to rock. � thin layer. I deptl, to rock. ; I ' ' : Severe: :Poor: 61 ,Severe: ;Severe: :Severe: e ; thin layer, Tassel : depth to rock. : depth to rock, ; depth to rock, : seepage. : seepage, : seepage. : area reclaim. : slope. . 1 62, 63 :Severe: Severe: ,Severe: ;Slight 'Fair: depth to rock. , depth to rock, : depth to rock. : , thin layer, Terry : area reclaim. seepage. + ' I : :Severe: ;Slight :Fair: 64, 65 ;Severe: :Severe: : thin layer. Thedalund ; depth to ruck. : depth to rock. : depth to rock. Slight :Moderate: Slight. :Poor: 66 Severe: ; too clayey. , too clayey. Ulm : peres slowly. , 67 :Severe: Moderate: ;Moderate: :Slight ;Poor: : too clayey. : : too clayey. Ulmperes slowly. slope. y Severe: :Severe: :Poor: G8R :moderate: Severe: �• IJstie 'Parr iorLheuts: slope. seepage, ' seepa e, , seepage, , too sandy, I small steee!c. .will ,Lone::. , Lou sandy. , ; 69, 70 L iglrL i :S evere: :'lever•t•: :Poor: Valent seepage., : too sandy, seepage. , too sandy. seepa seepage. ' 7 • : lR. ::rver�: ;Poor: Valent :Slight Severe: :Severe: too sandy. seepage. too sandy, seepage,' ; seepage. . 1 riN See footnote at end of table. Hello