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Home My WebLink About972491.tiff GEOLOGIC AND MINERAL EVALUATION FOR THE PROPOSED GRIESER MINOR SUBDIVISION WELD COUNTY, COLORADO Prepared for Intermill Land Surveying 1301 North Cleveland Avenue Loveland, Colorado 80537 February 19 , 1997 Commission No . : 1119-76-01-01 Prepared By FOUNDATION & SOILS ENGINEERING, INC. 5110 Granite Street, Suite D Loveland, Colorado 80538 EXHIBIT i g' 972491 Z_ 5�g TABLE OF CONTENTS Transmittal Letter I Scope 1 Site Description 1 Site Investigation 2 Geology 2 Potential Geologic Hazards and Recommendations 3 Soil Description 4 Potential Mineral Resources 4 Conclusion 4 Soils Summary Table 6 List of References 7 Geologic & Vicinity Map Figure 1 Soils Map Figure 2 Sand, Gravel , & Quarry Aggregate Resources Figure 3 372491 FOUNDATION Engineering, AND SOILS Inc. February 19 , 1997 Commission No. : 1116-76-01-01 Intermill Land Surveying 1301 North Cleveland Avenue Loveland, Colorado 80537 Gentlemen: The enclosed report presents the results of a geologic and mineral evaluation for Grieser Minor Subdivision, a proposed subdivision of Weld County, Colorado. We appreciate the opportunity to be of service to you on this project . If you have any questions, please feel free to call . Respectfully, G G Thomas W.W. Fi4ley, Engineering Geologist FOUNDATION & SOILS ENGINEERING, INC. TWF/j le i 5110 Granite Street • Loveland, Colorado 80538 • (970)663-0138 • Fax (970) 663-1660 515 Main Street, Suite C • Longmont,Colorado 80501 • (303) 702-0661 972491 SCOPE The following report presents the results of our geologic and mineral evaluation for Grieser Minor Subdivision, a proposed subdivision situate in the East Half of the East Half of the Northeast Quarter of Section 21, Township 4 North, Range 65 West of the 6th Prime Meridian, Weld County, Colorado. It is our understanding that the 40± acre site is to be divided into five (5) residential lots ranging in size from 4 . 3 acres to 20 . 0 acres . The purpose of this investigation is to identify potential geologic hazards and potential mineral resources which may conflict with the development intended. The conclusions and recommendations presented in this report are based upon the acquired field data, review of the available literature, and previous experience with similar geologic conditions in this area. SITE DESCRIPTION The site is located southeast of LaSalle, east of County Road No. 41 on County Road No. 44 . The parcel has slight to moderate slopes, generally to the west and north and is moderately to sparsely vegetated with grasses, weeds, and yucca. A residence and outbuildings are located on the future Lot 5 . Two (2) oil/gas wells are also located on the property. 1 972491 SITE INVESTIGATION The site was visually inspected on February 14 , 1997 . The locations of geologic features are approximate and should be considered only to the degree implied by the methods used to make those measurements . A preliminary radiation survey was also conducted at this time . GEOLOGY The proposed site lies near the eastern edge of the Colorado Piedmont Section of the Great Plains Physiographic Province . The Colorado Piedmont is an elongated trough in the Great Plains, adjacent to the Front Range of the Southern Rockies . The Colorado Piedmont was formed when uplift of the area in Miocene-Eocene times (20 - 50 million years ago) produced an increase of stream erosion resulting in scouring next tot he foothills and outlying areas . The Piedmont is bordered by the southern Rockies to the west, Great Plains escarpment to the northeast, and Palmer Divide to the south. Structurally, the site lies in the Denver Basin, which is a thick accumulation of Paleozoic and Mesozoic Era sediments involved with down warping in the basin area and uplift of the adjacent highlands . It is our understanding that faulting has not taken place in the recent historic past in this area . This area is 2 972491 classified as being in Seismic Zone 1 (Uniform Buiding Code- Chapter 23) . The upper elevations of this site are overlain with gravel and alluvium of Pleistocene age . These soils consist of sand, silt, clay, gravel, and cobbles . Our field observations indicate that calcium carbonate is crusted on most of the aggregate . Some of the aggregate consist of partly decomposed sandstone. The thickness of these deposits were not determined. The Upper Cretaceous Laramie Formation underlies the surficial soils . The Laramie Formation consists of carbonaceous shale, claystone, sandstone, and thin beds of coal . The Laramie Formation has been described as an area with potential for yielding uranium. The thickness of the Laramie Formation is in the order of 330 feet to 600 feet in this area . POTENTIAL GEOLOGIC HAZARDS A N D RECOMMENDATIONS The claystones of the Laramie Formation and associated soils may be potentially expansive . The effects of the potentially swelling and/or collapsible soil and rock can be minimized by careful planning prior to construction at the site . A geotechnical and/or site specific geologic investigation should be conducted at each 3 972,191 site to identify these conditions . As previously stated, the Laramie Formation may have the potential for yielding uranium . We recommend that a radiation survey be conducted in excavations exposing any part of this formation to determine if a radiation hazard exists . Mitigation recommendations may be made at that time . We further recommend that preliminary radon mitigation measures be incorporated in the construction of the homes at the site . SOIL DESCRIPTIONS The Soil Conservation Service describes three (3) different soil types at the site . A map showing the locations and a description of the soils are included at the end of this report (Figure No. 2 and attachments) . Most of the soils are sandy loams . The majority of the site is located in areas with slow to medium runoff and low hazards for wind and water erosion. POTENTIAL MINERAL RESOURCES The Colorado Geological Survey describes part of this site as having upland gravel deposits . It was observed in the field that these deposits have significant amounts of calcium carbonate deposits and decomposed rock. Therefore, we feel that these deposits are not of economical importance as a mineral resource . 4 972491 CONCLUSION Potential geologic hazards such as expansive soils may be located in various areas of the property. Care should be taken in choosing each building site and designing the roadways . Follow-up inspections, radiation survey, and recommendations should be conducted as necessary for each building site . Economic mineral resources were not found in the property. In conclusion, we feel that the development intended is compatible with the geologic conditions at the site provided the recommendations in this report are met . The data presented herein were collected to help determine the feasibility of this project . Professional judgments on design alternatives and criteria are presented in this report . These are based on evaluation of technical information gathered, partly on our understanding of the characteristics of the development proposed, and partly on our experience with geologic conditions in the area . We do not guarantee the performance of the project in any respect, only that our engineering work and judgments rendered meet the standard of care of our profession. 5 972491 SOILS SUMMARY TAB L E Hazards of Wind Water Soil Type Slope Runoff Erosion Erosion Nelson fine 0-3 Slow-Medium Low Low sandy loam Olney fine 1-3 Medium Low Low sandy loam Vona loamy sand 5-9 Medium Low Low 6 972491 LIST OF REFERENCES Schowochow, S.D. , Schroba R.R. , and Wicklein, P.C. , Atlas of Sand. Gravel , and Ouarry Aggregate Resources - Colorado Front Range Counties, Colorado Geological Survey, Special Publication 5-B, 1974 . Braddock, William A. , and Cole, James C. , Preliminary Geologic Map of the Greeley 1O x 2O Quadrangle, Colorado and Wyoming, USGS, Open-File Report 78-532 , 1978 Soil Survey of Weld County, Colorado, Southern Part, USDA - Soil Conservation Service, 1980 Rogers, W. P. Ladwig, L.R. , Hornbaker, A.L. , Schwochow, S.D. , Hart, S . S . , Shelton, D.C. , Scroggs, D.L. , and Soule, J.M. , Guidelines and Criteria for Identification and Land-Use Controls of Geologic Hazard and Mineral Resource Areas, Colorado Geological Survey, Special Publication 6 , 1974 . Shelton, David C. And Rogers, William P. Environmental and Engipeering Geology ad the Windsor Study Area, Larimer _and Weld Counties . Colorado, Colorado Geological Survey, Environmental Geology 6 , 1987. 7 97241.)1 Project No. II IG-76-oI ,..__,I h LvS,iuE ILt,1. A t2-rCoSw. Be,m . flr�wr ®\\f0 ', ; —rill: KI .. / F . j V ,f f I 1.7H14. J• I I . t o•! i , - .- ( ° •N k, 74 I , 1 C..2g - R-EISr•- c.c.,•-t E.— aics,Ja_i__c ALt-JJIJr c Cif_ - F'l.l.v CE�3E 9.R3=1ST'oCI.N�- �'4M-F PE -Pc i Q50 -50 - Fix's-race IC - OLr-)E/F_Co2r.JE-t.< 114-1-4.3J tJI1 kI - JR J_ tpLST.i s- nJ5 - Lot. -l�c t-r IS ifo wr,„.-r-,0 f.{ d�=� — GEOLOGIC 4 VICINITY MAP I -4OOO Based on: OSt S OPEN" R L.t R-=-Poe-'T "/5-53' FOUNDATION 4 SOILS ENGINEERING FIGURE NO. I 972 '91 Project No. 1116-16-01-01 2 e ( 6 17 d7 Ifa+ • l 5 \ 7, �f3..- ^lip' 47 6711, I �v 72 a r : Y/f ts 1di 0 ictit52 - 1 52 ,- 3 51? 38 (. 52 1 } I 2 / 52 1' • IcFY 3 e> - F-I is {-1 C i E_ 5 n-H by IDEA-t ( o ,3 9a S Ia pt) 47 - 0I 4E--r- -Five.— 5's— loos-1.T (1 -3°Je 51.-rr. J 14 - \foUrk Joar+Y5at-47 ( 5-g 2, `Jmvs ) orth SOILS MAP !Based on: Soil Survey of Weld County, Colorado- Southern Part 1 FOUNDATION 4 SOILS ENGINEERING FIGURE NO. 2 Fro j ct No. I I I(.D---7c, -01.'-: - %. 17 { 4 , 7 --_f (- ? 'i , . \( (I, ) 4,P‘‘ ' , )1 \ ) ' '. \ * / • X d' r ter• � � ( 1 • 1. �\--1./ :I , -r is I ` .1 b ti Li: • - \ ( ,. ielli\ / i \ , , l T k :, (.. I '': \ i ... 4 _J--,..0\1 �� ) o r J. cl:e1---/.,rm. r‘ -Y C 5rrv:. o:,Y V U P 1 1-4 r> 764,,,rid-rc -2._ - G rt ._J ; 516 N I Fi G,t«-r(' -P,N C5 , ,p .to rt P'o„r._w 2-Oc_►L Go.t.0 JI-( G.4 2r3 01-4 AT6__. SAND, CR4YEL. 4 QUARRY AGGREGATE RESOURCES Based on: Colorado Geological Survey- Special Publication 5-B FOUNDATION 4 SOILS ENCrtINEERING FIGURE NO. 3 I 972 1.131 WELD COUNTY, COL0120111, sulrflll'.MN PANT Irn FABLE. r.. _-1111II.DI N,: SI II DI:VI Ir.1.''Ir. _- .,il i•i'''''I Soil name and ".hallow Dwellings I I i.- Small ,nap symbol '''' 'Iv,,' ions withnnl wll'. . ,.nun ,'i.l basements baser„'", buildings I'J w,,,ler:rt,. ..v rrr•: .,r vol ..ev ere: , Colombo floods. floods . I'1„n,ls. floods- l 1 20 '.1 ght ;Moderate: Moderate: Moderate: w,.:,., :,re- Colomho low strength. low strenr.'• low strength. ;w slrenelh, frost action. 21 , 22 .Severe: ;Moderate: Slight ---_ Moderate' Severe: Dacono cutbanks cave. low strength, low strength, shrink-swell , ; shrink-swell . shrink-swell . low strength. 23, 211 Slight ;Moderate: Moderate: ;Moderate: moderate: Fort Collins low strength. low strength, low strength. 1-,v strength. shrink-swell . 25, 26 Severe: ;Severe: Severe: Severe: Severe: Haverson floods. ; floods. floods. ; floods. floods. 27, 28 Severe: ;Severe: Severe: Severe: Severe: Heldt too clayey. ; shrink-swell , shrink-swell , ; shrink-swell , shrink-swell , ' low strength. low strength. low strength, low strength. 29, 30 Slight ;Moderate: Moderate: Moderate: Moderate: Julesburg ; low strength. low strength. low strength. low strength, frost action. 31 , 32 Slight ;Moderate: Moderate: Moderate: Moderate: Kim I low strength. low strength. low strength. low strength. 33, 34 Slight ;Moderate: Moderate: Moderate: Moderate: Kim ; low strength. low strength. low strength, low strength. slope. 35": Loup Severe: ;Severe: Severe: Severe: Severe: wetness, ; wetness, wetness, wetness, wetness. cutbanks cave. I floods. floods. floods. noel Severe: ;Severe: Severe: Severe: Cevore: wetness, ; wetness, wetness, wetness, wetness, floods , floods . floods. floods. flo ods. cutbanks cave. 36.: Midway Severe: ;Severe: Severe: ;Severe: Severe: ton clayey. ; shrink-swell , shrink-swe'! ; slope , air ink-swill low strength . low strenrt',. shrink-swell , I ,w strength. low strength. Shingle Severe: 'Severe: ;Severe: ;Severe: Severe: depth to rock. depth to rock. ; depth to rock . ; depth to rock , depth to rock. slope. 37 Severe: Moderate: ;Severe: ;Moderate: Moderate: Nelson depth to rock. depth to rock , ; depth to rock. ; depth to rock, depth to rock, il low strength. low strength. low strength. — 38 Severe: Moderate: ;Severe: ;Moderate: Moderate: Nelson depth to rock. depth to rock, ; depth to rock. ; slope, depth to rock, low strength. ; depth to rock, low strength. , , low strength. 39, 40, 41 , 42, 43 Moderate: ,Severe: ;Severe: Severe: Severe: Nunn too clayey. ; shrink-swell , 1 shrink-swell , shrink-swell , shrink-swell , low strength. 1 low strength. low strength. low strength. See footnote at. end of table . 972491 91 102 SOIL St/ItlIEY TABLE 6.--nniiIlINi, Sll'F hF VFI.OPMF.NT--Cont]nued Soil name and Shallow Dwellings Dwellings map syrn h•il rx .'r v.rt inns Small without. with nc 5 basements commercial and streets roads h t rments buildingsSlight Olney Slight Slight Slight ;Moderate; 45 low strength. Slight Slight Slight Moderate: ,Moderate: •ll ne.y 5, 7 --- -- __ _ low strength. Olney Slight $light Sli ht ;_________ R Slight :Moderate: 3 -F- og Slight —_.— Slight _ __.. -_.. low strength. u y Slight Moderate: ;Moderate: slope. low strength. 9 Severe: Slight cave. Slight Slight ;Slight. Osgood cutbanks 50, 51 Otero Slight Slight Slight Slight ;Slight. o 52, 53 Slight ----.- Slight Slight Moderate: :Slight. ��' slope. l iry Paoli Slight ;Severe: Severe: floods. Severe: Moderate: floods. floods. low strength, 55 frost action. Slight ;Slight Slight Slight Moderate: Paoli lo • w low strength, Sb frost action. Moderate: ;Moderate:Renohill depth to rock, Moderate: Moderate: !' low strength, low strength, :Severe: too clayey. shrink-swell. depth to Bock, low strength, low strength, shrink-swell . shrink-swell. shrink-swell . 57 Moderate: Renohill ;Moderate: Moderate: depth to rock, low strength, Moderate: :Severe: strength, too clayey. shrink-swell, depth torock, slope, low strength, low strength, ; shrink-swell. shrink-swell. shrink-swell. 58, 59 Severe: • Shingle :Severe: Severe: Severe:depth to rock. ; depth to rock, depth to rock. depth to rock. :Se depth to rock. Shingle Severe: ;Severe: Severe: depth to rock. depth to rock. depth Severe: Severe: p to rock. depth to rock. depth to rock. Renohill Moderate: • ;Moderate: Moderate: depth to rock, low strength, Severe:l s too clayey. dew strength,roc, slope, low sire 11 . y y ; shrink-swell . depth to rock, low strength, shrink-swell. shrink-swell . shrink-swell . hl Moderate: Tassel :Moderate: moderate: depth to rock . I depth tI rock. depth Severe: Moderate: j ..pth to rock. slope. depth to rock. b' Severe: ;Moderate: ,vere: Terry depth to rock. ; depth to rock. Moderate:t Moderate: ! depth to rock. depth to rock. depth to rock. 63 Severe: Moderate: depth to rock . 'v cre: '�depths,t: Moderate: 'agcy d depth to rock. !opt,' to rock. depth to ruck, depth to rock. slope. 61 Moderate: Moderate: Thedalund depth to r . k. low 'Or !I h. ;:Iol r o rock Doer ate: Moderate: �`pt !: to . low strenglh- lo w low strength. 65 Moderate: Modera,J ThedalunA I ate: Iodinate:air: depth r_o ro.�4. Inw ;I � .,. '11i. , Moderate: -th to rock. low ;Lr'e nr.th low strength. vpr See footnote at _nd of table . WELI1 COUNTY, COLOItAl)1, SOUTHEILN PAIN' 1U{ TABLE 6.--MUII.DING SITE DEVELOPMENT--Continued Soil name and Shallow Dwellings Dwellings Small Local toads map symbol excavations without with commercial and streets g i basements basements buildings 66, 67 Moderate: Severe: Severe: ;Severe: Severe: Ulm too clayey. shrink-swell . shrink-swell . 1 shrink-swell . low strength, shrink-swell . 68* ;Severe: Moderate: Moderate: ;Moderate: ,Moderate: Ustic small stones, slope. slope. ; slope. 1 slope. Torriorthents cutbanks cave. 1. 69 Severe: Slight Slight ;Slight ---Slight. Valent cutbanks cave. 70 Severe: Slight Slight ;Moderate: ;Slight.. Valent cutbanks cave. ; slope. 71•: Valent Severe: Slight Slight ;Moderate: ;Slight . cutbanks cave. ; slope. Loup Severe: Severe: Severe: :Severe: ;Severe: wetness, wetness, wetness, ; wetness, ; wetness. cutbanks cave. floods. floods. ; floods. 72 Slight Slight Slight ;Slight Moderate: Vona • low strength. 73, 74 Slight Slight Slight ;Moderate: Moderate: Vona ) slope. low strength. _4_ -- 75, 76 Slight Slight Slight ;Slight Moderate: Vona low strength. 77 Slight Slight Slight ;Moderate: Moderate: Vona slope. low strength. 78, 79 Slight Moderate: Moderate: ;Moderate: Moderate: Weld low strength, low strength, I low strength, low strength, shrink-swell . shrink-swell . ; shrink-swell . shrink-swell , i frost action. 80 Slight Moderate: Moderate: ;Moderate: Moderate: Weld low strength, low strength, : low strength, low strength. shrink-swell . shrink-swell . I slope, shrink-swell , shrink-swell . frost action. 81* , 82•: Wiley Slight Moderate: Moderate: ;Moderate: Moderate: low strength, low strength, 1 low strength, low strength, shrink-swell . shrink-swell . I shrink-swell . shrink-swell . i Colby 'Slight Slight Slight ;Slight Moderate: low strength. 83•• Wiley Slight Moderate: Moderate: ;Moderate: Moderate: low strength, low strength, I low strength, low strength, shrink-swell . shrink-swell. ; slope, shrink-swell . 1 shrink-swell . Colby ;Slight Slight Slight !Moderate: Moderate: slope. low strength. • See map unit description for the composition and behavior of the map unit. ll 9724511 Wrci,l1 LOWS1fY, ('oLOHAIat, SUlrl'liI.itN I'Alt'I' 105 FAII;J 7. --SANITARY lb• - ! III ';__ronllnued 1 Soil name and Septic tank Sewage lagoon Trench Area ' I Y"'' ' I at,sorpLi or, at aryDaily cover fields landfill sanitary for landfill I landfillSevere: Sever'e:Damon peres slowly seeraP,e. • , c_ SIiP,ht. Fair: 1 -, ppaa,e . too clayey. 3 - - ;Moderate: ;Moderate: l i ghi - . - Slight GoodFort. 1.oll ..,, peres slowly seepageV ..- Moderate: ;Moderate:Fort Collins ' peres slowly, seepage, light, S1 iP,hl Good. slope. 5, 2h ;Severe: ;Severe: !Severe: Severe: Good. Haverson ; floods. 1 floods. ' floods. floods. 7, 28 - ;Severe: ;Moderate: 'Jeverer Slight Poor: Heldt ; peres slowly. ; slope. ' too clayey . too cla eY Y• 9, 3D ;Slight Severe: 'Severe: Severe: Good. Juleshurp, seepage. ; seepage. seepage. 1 ;Slight Moderate: ;Slight Slight Good. Kim seepage. 2, 33 ;Slight ;Moderate: ;Slight Slight Good. imseepage, slope. V ;Slight S Sl fight Slight Good. im slope. ':oup ;Severe: ;Severe: ;Severe: ;Severe: Poor: I wetness, ; wetn , ; wetness, ; wetness, wetness. floods. I seepage, I floods , ; floods, floods. ' seepage. ; seepage. Poe! Severe: ;Severe: :Severe: ;Severe: Poor: wetness , ; wetness, wetness , wetness , too sandy. floods. seepage, floods, ; floods. floods. seepage.x :idway---- . ',rverr 'Severe: ore: ;Moderate' Poor: pests . lowly, depth to rock, depth to rock, ; slope. too clayedepth t .• rock . slope. too clayey. thin layer. hingle____. _ Severe:- Severe: . were: Hoderate: ;evere: depth t - , ,,It slop?, tepth to rock. slod po. 'hie layer. epth to ock. , 38 Severe: Severeevere: Severe: Fairelson depth to rock. depth to rock, depth to rock, seepage. thin layer. seepage. seepage. ht g Severe: Moderate: ;Sliunn g Sli htFtoo:peres slowly. exr.ess humus. too clayey. Severe: Moderate: Sli ,htunn p Slight. Fair: perms slowly, excess humus, too clayey. slope.'Severe: Moderate: Isli ht ;S1ighL Fair: unn ; peres .lowly. excess humus. ' g too clayey. Severe: Moderate: 'Sli htunn peres slowly . g ;Slight. Fair: excess humus, too clayey. slope. See footnote at end of Lill,'_ 9724,91 106 SOIL SURVEY l Anl.E. 7.--SANIfAt?Y EACII.ITIES--Continued Soil name and ____ _.___-__ Septic Lank Sewage lagoon Trench map symbol absorption Area areas sanitary Da1lY cover f ie lri. _-- . landfill landfill sanitary for landfill 1, . _ .-.__. _.. landffil lll 113 '- ;Severe: Munn Moderate: ;Slight. Slight. 'Fair: ; pores slowly. excess humus. ,�., OV, 45, 46, 47, 48-- ;Slight : too clayey, f Olney Severe :Slight ht '�- ' Y Slight ;Good. I---� seepage. r19 Slight Osgood Severe: Severe: Severe: seepage seepage. ;F too 50, 51 , 57 seepage. ; too sandy, Otero Slight ;Severe: Slight Slight ;Good. seepage. 53 Slight :Severe: Slight Slight slope, ;Good. seepage. 511 Slight ;S Paoli `- evere: Severe: Severe: !Good. I seepage. , seepage. seepage. • -La 55 Slight :Severe: (Severe: Severe: ;Good, • I seepage. I seepage. seepage. 56, 57 Severe: ;Severe: ;Severe: Slight ;Fair: Renohill peres slowly, ; depth to rock. ; depth to rock. ; too clayey, depth to rock. thin layer. 58, 59 Severe: ;Severe: S Shingle depth to rock. ; depth to rock. ; depth to rock, Slight :Poor: thin layer. 60'1: Shingle Severe: ;Severe: ;Severe: Slight depth to rock. i depth to rock. ; depth to rock. g 'Pthi: thin layer. Renohill Severe: ;Severe: percs :Severe: Slight Fair: slowly, ; depth to rock. 1 depth to rock. depth to rock. too clayey, thin layer. 61 Severe: ,'Severe: $ Severe Tassel depth to rock. I depth to rock, ; depth to rock, seeag Poor: ; seepage, ; seepage, seep a: thin layer, slope, area reclaim. 6?, 63 Severe: ;Severe: S .Terry depth to rock. ; depth to rock, ; depth to rock, Slight Fair: seepage. thin layer, area reclaim. 64, 65 Severe: ;Severe: Thedalund depth to rock. I depth to rock. :$depth to rock,evere: Slight :Fair: 56 I thin layer. Severe: Ulm percs slowly. :Slight ;Moderate: Slight ;Poor: too clayey. ; too clayey. 67 Severe: Moderate: ;Moderate:Ulm percs slowly. slope. ; too cla a Slight ;Poor: 68! Y y_ ; too clayey. Moderate: Severe: .Severe:llstic Torriorthents slope. seepage , Sseepa: ;Poor: I seepage, seepage. too sandy, small stones. too sandy. 69 70 I small stones. Valent Slight Severe: ;Severe: Severe: 'o"page, [no sand ;Poor: Y . seepage. too sandy. seepage. 71 Valer,l - Slight-- v„ "Severe: Severe: ;Poor: '' •' ton san_f seepage Y. ' too sandy. See Coo tu.,t.• at end of table. l 972491 fL aG WELD COUNTY, COLORADO, SOUTHERN PAL (07 TABLE 7.--SANITARY FACILITIES—continued I _. _.r. _-- .._ .. - * i � Ilaily cover Soil— Area Sewage P,e lagoon Trench for landfill m name ym and Septic tank sanitary sanitary areas P - landfill _ _ . __. _. map symbol absorption ; landfill PI- . i 1.B fields ___r.__ ;Severe: Poor: J 7Lo Severe: ,Severe: wetness. Severe: ; wetness, ; Wetness, Loup wetness, t wetness , 1 seepage, ; seepage, floods. seepage, ; floods. floods. floods. Severe: ;Slight ;Slight Good. 72, 73 Slight ; see a e. Vona ___,- ;Slight Slight ;Good. Slight Severe: 74 seepage, __ Vona slope. _ I - —1-7 Slight Good. Severe: ;Slight 75, 76, 77 Slight seepage. Vona Slight Good. Moderate: ;Slight 7W Moderate: seepage. �- Weld peres slowly. Good. ;Slight Slight Moderate: Moderate: 79, 80 peres slowly. slope, weld seepage. 81': Slight Slight Fair: Moderate: Moderate: too clayey. Wiley peres slowly. seepage. Sl1 ht Good. Colby Slight Moderate: Slight g seepage.•d 82" 83": Slight Fair: Wiley Moderate: Moderate: Slight air clayey. peres slowly. seepage, slope. • Colby Slight Moderate: ;Slight Slight Good. seepage. -- See map unit description for the composition and behavior of the map unit. • 1 1 Y 9'7 d`:e?1. Hello