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Home My WebLink About20011542.tiff Soils Report Southwest Quarter of Section 10, Township 1 North, Range 67 West of the 6th P.M., County of Weld, State of Colorado. Compiled By: Intermill Land Surveying, Inc. 1301 N. Cleveland Avenue Loveland, Colorado 80537 (970) 669-0516 Contents: Arial Map Soil Descriptions Soil Data Tables 2001-1542 EXHIBIT I /G 42 ya rn[a ¢ ,;:y+r4y <� to el ca T t y , j�,r kR , qleilieH 2 ld i hr ' i y�1 t Vitae insi.s.... . 4 1 p i n o 1.,_, \I_ , 7 ' ...* Apr 1,11/4 ,.. ,., �,,,. wy �- 57 RY y'"PFdi-N. Drre„ , • ,_ Nit I • I -'ems . ev Y�, �83 Y 67 jc7,... i ' y PI IE 82 s 83 C.i" � }�Iiy ..-.-�irrie '�I"�T '1 1' ` -.. ti x 382_ " 1 ,... }frr74.:" 15 .. . x: . +. -.. H 42i ..�.r� —_ env �._..._ ... r } a., i` �y a i, \j V^ t4. 1 . , �)y� a VI 1'"'^ " N- Vi a. ■IRS. .o r '" * _ �. _ }, s5 y" f ;r 42 �, . . , �, 4 , r A. WELD COUNTY, COLORADO, SOUTHERN PART 43 JYcestock and wildlife share the range. Livestock watering ing. The grass selected should meet the seasonal require- ilities also are utilized by various wildlife species. The ments of livestock. It can be seeded into a clean. firm cropland areas provide favorable habitat for pheasant and sorghum stubble, or it can be drilled into a firm prepared mourning dove. Many nongame species can be attracted seedbed. Seeding early in spring has proven most success- by establishing areas for nesting and escape cover. ful. The underlying shale is the most limiting feature of Windbreaks and environmental plantings of trees and this soil. Neither septic tank absorption fields nor sewage shrubs commmonly grown in the area are generally well lagoons function properly. In places the underlying shale suited to this soil. Cultivation to control competing has high shrink-swell potential. Environmental and beau- vegetation should be continued for as many years as tification plantings of trees and shrubs can be difficult to possible following planting. Trees that are best suited and establish. Capability subclass IVe irrigated, VIe nonir- have good survival are Rocky Mountain juniper, eastern rigated; Loamy Plains range site. redcedar, ponderosa pine, Siberian elm, Russian-olive, and 66—Ulm clay loam, 11 to 3 percent slopes. This is a hackberry. The shrubs best suited are skunkbush sumac. deep. well drained soil on plains at elevations of 5.075 to lilac, Siberian peashrub. and American plum. 5,200 feet. It formed in alluvial and eolian sediments from Wildlife is an important secondary use of this soil. The shale. Included in mapping are small areas of soils that cropland areas provide favorable habitat for ring-necked have shale between 40 and 60 inches. Also included are pheasant and mourning dove. Many nongame species can small areas of soils where the surface layer and subsoil be attracted by establishing areas for nesting and escape have been recharged with lime from irrigation. cover. For pheasants, undisturbed nesting cover is essen- Typically the surface layer of this Ulm soil is brown tial and should be included in plans for habitat develop- clay loam about 5 inches thick. The subsoil is brown and ment, especially in areas of intensive agriculture. Range- pale brown clay about 14 inches thick. The substratum to land wildlife, for example. the pronghorn antelope, can be a depth of 60 inches is clay and clay loam. attracted by developing livestock watering facilities, Permeability is slow. Available water capacity is high. managing livestock grazing, and reseeding where needed. The effective rooting depth is 60 inches or more. Surface This soil has poor potential for urban and recreational runoff is medium, and the erosion hazard is low. development. Slow permeability and high shrink swell In irrigated areas this soil is suited to all crops com- cause problems in dwelling and road construction. Capa- . monly grown in the area, including corn, sugar beets, bility subclass Ile irrigated, IVe nonirrigated; Clayey r'ans, alfalfa, and small grain. An example of a suitable Plains range site. Jpping system is 3 to 4 years of alfalfa followed by 67—Ulm clay loam, 3 to 5 percent slopes. This is a corn, corn for silage, sugar beets, small grain, or beans. deep, well drained soil on plains at elevations of 5,075 to Land leveling, ditch lining, and installing pipelines are 5.200 feet. It formed in alluvial and eolian sediments from needed for proper water applications. shale. Included in mapping are small areas of soils that All methods of irrigation are suitable, but furrow ir- have shale between depths of 40 and 60 inches. Also in- rigation is the most common. Barnyard manure and com- eluded are small areas of soils where the surface layer mercial fertilizer are needed for top yields. and subsoil have been recharged with lime from irriga- In nonirrigated areas this soil is suited to winter wheat. tion. barley, and sorghum. Most of the acreage is planted to Typically the surface of this Ulm soil is brown clay winter wheat. The predicted average yield is 28 bushels loam about 5 inches thick. The subsoil is brown and pale per acre. The soil is summer £allowed in alternate years brown clay about 12 inches thick. The substratum to a to allow moisture accumulation. Generally precipitation is depth of 60 inches is clay and clay loam. too low for beneficial use of fertilizer. Permeability is slow. Available water capacity is high. Stubble mulch farming, striperopping, and minimum til- The effective rooting depth is 60 inches or more. Surface lage are needed to control soil blowing and water erosion. runoff is medium. and the erosion hazard is moderate. Terracing also may be needed to control water erosion. In irrigated areas this soil is suited to the crops com- The potential native vegetation is dominated by monly grown in the area. Perennial grasses and alfalfa or western wheatgrass and blue grama. Buffalograss is also close grown crops should be grown at least 50 percent of present. Potential production ranges from 1,000 pounds the time. Contour ditches and comigations can be used in per acre in favorable years to 600 pounds in unfavorable irrigating close grown crops and pasture. Furrows, con- Years. As range condition deteriorates, a blue grama-buf- tour furrows, and cross slope furrows are suitable for row (atop-ass sod forms. Undesirable weeds and annuals in- crops. Sprinkler irrigation is also desirable. Keeping til- vade the site as range condition becomes poorer. lage to a minimum and utilizing crop residue help to con- t Management of vegetation on this soil should be based trol erosion. Maintaining fertility is important. Crops on taking half and leaving half of the total annual produc- respond to applications of phosphorus and nitrogen. tion. Range pitting can reduce runoff. Seeding is desirable In nonirrigated areas this soil is suited to winter wheat. -: the range is in poor condition. Western wheatgrass, barley, and sorghum. Most of the acreage is planted to ue grama, sideoats grama. buffalograss, pubescent winter wheat. The predicted average yield is 2sl bushels ^heatgrass, and crested wheatgrass are suitable for seed- per acre. The soil is summer followed in alternate years ILL SURVEY • WELD COUNTY, COLO' .pa- Management of vegetation on this soil should be based This unit is used for irrigated and nonirrigated ..--8 on taking half and leaving half of the total annual product cropland and for. rangeland, wildlife habitat, and urban -hi. Lion. Seeding is desirable if the range is in poor condition, development. ern Sideoats grama, little bluestem, western wheatgrass, blue In irrigated areas these soils are suited to the crop: !lot' grama, pubescent wheatgrass, and crested wheatgrass are commonly grown in the area. Perennial grasses and alfai- the suitable for seeding. The grass selected should meet the fa or close grown crops should be grown at least 50 per- ,er- seasonal requirements of livestock. It can be seeded into cent of the time. Contour ditches and corrugations can bt a clean• firm sorghum stubble or it can be drilled into a used in irrigating close grown crops and pasture. Fur in firm prepared seedbed. Seeding early in spring has rows, contour furrows, and cross slope furrows are suita- r is proven most successful. ble for row crops. Sprinkler irrigation is also desirable- it is Windbreaks and environmental plantings are generally Keeping tillage to a minimum and utilizing crop residu,. ub- well suited to these soils. Cultivation to control competing help to control erosion. Maintaining fertility is important ilty vegetation should be continued for as many years as Crops respond to applications of phosphorus and nitrogen possible following planting. Trees that are best suited and In nonirrigated areas these soils are suited to winte' ter have good survival are Rocky Mountain juniper, eastern wheat, barley, and sorghum. Most of the acreage i hes redcedar, ponderosa pine, Siberian elm, Russian-olive, and planted to winter wheat. The predicted average yield i .ion hackberry. The shrubs best suited are skunkbush sumac, 28 bushels per acre. The soil is summer (allowed in a lilac. Siberian peashrub, and American plum. ternate years to allow moisture accumulation. General! Led Openland wildlife, such as pheasant, mourning dove, precipitation is too low for beneficial use of fertilizer. ver and cottontail are best suited to these soils. Wildlife Stubble mulch farming, striperopping, and minimum ti. ing habitat development, including tree and shrub plantings lage are needed to control soil blowing and water erosion 60 and grass plantings to serve as nesting areas, should be Terracing also may be needed to control water erosion. successful without irrigation during most years. Under ir- The potential native vegetation is dominated by blu is rigation, good wildlife habitat can be established, benefit- grama. Several mid grasses, such as western wheatgras .re. ing many kinds of openland wildlife, and needleandthread, are also present. Potential produ is The Wiley soil has only fair potential for urban and tion ranges from 1,600 pounds per acre in favorable year recreational development. Slow permeability, moderate to 1,000 pounds in unfavorable years. As range conditic ted shrink-swell potential, and limited bearing capacity cause deteriorates, the mid grasses decrease; blue grama, bu Ian, problems in dwelling and road construction. The Colby falograss, snakeweed, yucca, and fringed sage increas soil has good potential for urban and recreational develop- and forage production drops. Undesirable weeds and a: tps ment. Road design can be modified to compensate for the nuals invade the site as range condition becomes poorer. ?ts, limited capacity of this soil to support a load. Capability Management of vegetation on these soils should f a subclass IIe irrigated, IVe nonirrigated; Loamy Plains based on taking half and leaving half of the total annt: Ail- range site. or 83—Wiley-Colby complex, 3 to 5 production. Seeding is desirable if the range is in po p percent slopes. This condition. Sideoats grama, little bluestem, western whet. nes gently sloping map unit is on plains at elevations of 4,850 grass, blue grama, pubescent wheatgrass, and crest. to 5,000 feet. The Wiley soil makes up about 60 percent of wheatgrass are suitable for seeding. The grass select, ir- the unit, and the Colby soil about 30 percent. About 10 should meet the seasonal requirements of livestock. It c: 'm- percent is Heldt silty clay and Weld loam. be seeded into a clean, firm sorghum stubble, or it can The Wiley soil is deep and well drained. It formed in drilled into a firm prepared seedbed. Seeding early ter calcareous eolian deposits. Typically the surface layer is spring has proven most successful. is pale brown silt loam about 11 inches thick. The subsoil is Windbreaks and environmental plantings of trees a, is pale brown silty clay loam about 23 inches thick. The sub- shrubs commonly grown in the area are generally w. al- stratum to a depth of 60 inches is very pale brown silty .11y clay loam. suited to these soils. Cultivation to control competi vegetation should be continued for as many years Permeability is moderately slow. Available water possible following plantings. Trees that are best suit til- capacity is high. The effective rooting depth is 60 inches and have good survival are Rocky Mountain juniper, ea: .m. or more. Surface runoff is medium to rapid, and the ero- sion hazard is moderate. em redcedar, ponderosa pine. Siberian elm, Russian-oh.. .ue The Colby soil also is deep and well drained and formed and hackberry. The shrubs best suited are skunkbu 45S in calcareous eolian deposits. Typically the surface laver sumac, lilac. Siberian peashrub, and American plum. -IC' is pale brown loam about 7 inches thick. The underlying Openland wildlife, such as pheasant, mourning do ,.rs material is very pale brown silt loam to a depth of 60 and cottontail. are best suited to these soils. Wildl. .on inches. habitat development, including tree and shrub plantiu uf- Permeability is moderate. Available water capacity is and grass plantings to serve as nesting areas, should ;e: high. The effective rooting depth is 60 inches or more. successful without irrigation during most years. Under :n-,Surface runoff is medium to rapid, and the erosion hazard rigation. good wildlife habitat can he established. bear. moderate. ing many kinds of openland wildlife. eat- ' WELD COUNTY, COLORADO, SOUTHERN PART This unit is used for irrigated and nonirrigated The Wiley soil has only fair potential for urban and '^ropland and for rangeland. wildlife habitat, and urban recreational development. Slow permeability, moderate evelopment. shrink-swell potential. and limited bearing capacity cause In irrigated areas these soils are suited to the crops problems in dwelling and road construction. The Colby commonly grown in the area. Perennial grasses and alfal- soil has good potential for urban and recreational develop- fa or close grown crops should be grown at least 50 per- ments. Road design can be modified to compensate for cent of the time. Contour ditches and corrugations can be the limited capacity of this soil to support a load. Capa- used in irrigating close grown crops and pasture. Fur- bility subclass the irrigated, IVe nonirrigated; Loamy rows, contour furrows, and cross slope furrows are suita- Plains range site. ble for row crops. Sprinkler irrigation is also desirable. Keeping tillage to a minimum and utilizing crop residue help to control erosion. Maintaining fertility is important. Use and management of the soils Crops respond to applications of phosphorus and nitrogen. The soil survey is a detailed inventory and evaluation In nonirrigated areas these soils are suited to winter of the most basic resource of the survey area—the soil. It wheat, barley, and sorghum. Most of the acreage is is useful in adjusting land use, including urbanization, to planted to winter wheat. The predicted average yield is the limitations and potentials of natural resources and the 28 bushels per acre. The soil is summer fallowed in al- environment. Also, it can help avoid soil-related failures ternate years to allow moisture accumulation. Generally in uses of the land. precipitation is too low for beneficial use of fertilizer. mulch farming, stri cro While a soil survey is in progress, xtensives, con- Stubble e g, strip cropping, and minimum til- servationists, engineers, and others keep extensive notes lage are needed to control soil blowing and water erosion. about the nature of the soils and about unique aspects of Terracing also may be needed to control water erosion. behavior of the soils. These notes include data on erosion, The potential native vegetation is dominated by blue drought damage to specific crops, yield estimates, flood- grama. Several mid grasses, such as western wheatgrass ing, the functioning of septic tank disposal systems, and and needleandthread, are also present. Potential produc- other factors affecting the productivity, potential, and F tion ranges from 1,600 pounds per acre in favorable years limitations of the soils under various uses and manage- F_._. to 1,000 pounds in unfavorable years. As range condition ment. In this way, field experience and measured data on deteriorates, the mid grasses decrease; blue grama, buf- soil properties and performance are used as a basis for '.:. ,�lograss, snakeweed, yucca, and fringed sage increase; predicting soil behavior. 1 forage production drops. Undesirable weeds and an- Information in this section is useful in planning use and nuals invade the site as range condition becomes poorer. management of soils for crops, pasture, and rangeland, as Management of vegetation on these soils should be sites for buildings, highways and other transportation based on taking half and leaving half of the total annual systems, sanitary facilities, and parks and other recrea- , - production. Seeding is desirable if the range is in poor tion facilities, and for wildlife habitat. From the data *' condition. Sideoats grama, little bluestem, western wheat- Presented, the potential of each soil for specified land > grass, blue grama, pubescent wheatgrass, and crested uses can be determined, soil limitations to these land uses wheatgrass are suitable for seeding. The grass selected can be identified, and costly failures in houses and other should meet the seasonal requirements of livestock. It can structures, caused by unfavorable soil properties, can be ;;?: be seeded into a clean, firm sorghum stubble, or it can be avoided. A site where soil properties are favorable can be „€'• , drilled into a firm prepared seedbed. Seeding early in selected, or practices that will overcome the soil limita- a spring has proven most successful. tions can be planned. Windbreaks and environmental plantings of trees and Planners and others using the soil survey can evaluate .4/„.sl of the survey area or other broad planning shrubs commonly grown in the area are generally well the impact of specific land uses on the overall productivi- suited to these soils. Cultivation to control competing ty area and on ;vegetation should be continued for as man the environment. Productivity and the environment are y years as Possible following plantings. Trees that are best suited closely related to the nature of the soil. Plans should td have good survival are Rocky Mountain juniper, east- maintain or create a land-use pattern in harmony with the � redcedar, ponderosa pine, Siberian elm, Russian-olive, natural cil. hackbe Contractors ous can find information avel, a that is in lather fry. The shrubs best suited are skunkbush ing sources of sand and gravel, roadfill, and topsoil. Other lilac, Siberian peashrub, and American plum. information indicates the presence of bedrock, wetness, or °Penland wildlife, such as pheasant, mourning dove, very firm soil horizons that cause difficulty in excavation. . cottontail, are best suited to these soils. Wildlife Health officials, highway officials, engineers, and many tat development, including tree and shrub plantings other specialists also can find useful information in this grass plantings to serve as nesting areas, should he soil survey. The safe disposal of wastes. for example, is ful without irrigation during most years. Under ir- closely related to properties of the soil. Pavements. side- On, good wildlife habitat can he established, benefit- walks, campsites, playgrounds, lawns, and trees and tnanY kinds of openland wildlife. shrubs are influenced by the nature of the soil. • 74 SOIL SURVEY i"� Thedalund series Clca-19 to 34 inches; very pale brown (10YR 7/3) clay, pale b (10YR a .moista weak esv subangular lime blocky structure; The Thedalund series consists of moderately deep, well tremely hard, very firm; some visible occuring in medium masses;calcareous: moderately alkaline;gradual smooth boundary, drained soils that formed in residuum from soft calcare- ous shale. Thedalund soils are on plains. Slopes are 1 to 9 C_ca-34 to 60 inches; very pale brown (10YR 7/3) clay loam, percent. brown (10YR 6,3) moist: weak coarse subangular blocky stood very hard,Thedalund soils are similar to Kim, Nelson, Otero, Shin- calcareous; moderately alkaline me recufirm; some visible ng in med;um soft m cve� glen and Tassel soils and are near the Olney and Terry Thickness of the solum ranges from 15 to 36 inches. Rock (ragmerp_ soils. Kim, Otero, and Olney soils are deep. Nelson and Tassel soils are less than 18 percent clay in the C horizon. make up 0 to 5 percent of the solum. Terry soils have a 82t horizon that is less than 18 percent T1e horizon has hue of Th R or horiz value of 5 or 6 dry and 4 or S. moist,and chroma of 2 or 3.The B2t horizon is commonly clay that is 46 clay. Shingle soils have shale between 10 and 20 inches. to 50 percent clay. Typical pedon of Thedalund loam, 3 to 9 percent slopes, 2,050 feet north and 1,800 feet east of southwest corner Valent series sec. 29, T. 7 N., R. 65 W. Ap—o to 8 inches; brown (10YR 5/3) loam, dark brown (101'R 4/31 The Valent series consists of deep, excessively drained soils that formed in eolian deposits. Valent soils are on moist; moderate fine granular structure; slightly hard, friable; 5 percent shale chips; calcareous; moderately alkaline; abrupt smooth plains. Slopes are 0 to 9 percent. 'r, boundary. Valent soils are near the Loup, Boel, Osgood, and Vona ry Clca-8 to 12 inches; pale brown (10YR 6/3) loam, brown (10YR 5/3) soils. Loup and Boel soils are poorly drained. Osgood and moist; weak fine granular structure; slightly hard, friable; some Vona soils have a B horizon. visible lime in medium soft masses: calcareous; moderately alkaline; clear smooth boundary. 3 Typical pedon of Valent sand, 0 to 3 percent slopes, C2ca-12 to 25 inches; very pale brown (10YR 7/4) loam stratified with 2,220 feet north and 132 feet west of southeast corner thin lenses of shale, light yellowish brown (10YR 6/4) moist; mas- sec. 8, T. 4 N., R. 62 W.sive; slightly hard, friable; some visible lime occuring in medium soft masses; calcareous; moderately alkaline;abrupt smooth bounda- Al—0 to 8 inches; brown (10YR 5/3) sand, dark grayish brown (10YR ry 4/2)moist;single Car-25 inches; soft calcareous shale. grained;loose;neutral;clear smooth boundary. C1--8 to 60 inches; brown (10YR 5/3) sand. dark grayish brown (10YR s: Typically these soils have free carbonates at the surface. Depth to 4/2) moist;single grained; loose; neutral. shale ranges from 20 to 40 inches. Content of rock fragments ranges Coarse fragments make up 0 to 10 percent of the solum and are from 0 to 15 percent. The A horizon has hue of 10YR or 2.5Y,value of 5 or 6 mainly scattered gravel. Depth to free carbonates is more than 40 dry and 4 or 5 inches. moist, and chroma of 2 or 3. The C horizon has hue of 10YR or 2.51. It The A horizon has hue of 10YR and 2.51, value of 5 or 6 dry and 3 to is loam or clay loam that is 18 to 35 percent clay. 5 moist,and chroma of 2 or 3. Ulm series • Vona series The Ulm series consists of deep, well drained soils that formed in calcareous alluvial and eolian sediments from The Vona series consists of deep, well drained to shale. Ulm soils are on plains. Slopes are 0 to 5 percent. somewhat excessively drained soils that formed in eolian or alluvial deposits. Vona soils are on plains and high ter- Ulm soils are similar to the Fort Collins, Renohill, and Wiley soils and are near the Heldt and Nunn soils. Fort races. Slopes are 0 to 9 percent. i Collins and Wiley soils are less than 35 percent clay in Vona soils are similar to the Olney and Terry soils and the 82t horizon. Renohill soils have shale between 20 and are near the Ascalon, Bresser, Julesburg, Osgood, Otero, 40 inches. Heldt soils lack a B2t horizon. Nunn soils have and Valent soils. Olney, Ascalon, and Bresser soils are more than 18 percent clay in the B2t horizon. Terry soils a dark colored surface layer. have sandstone between 20 and 40 inches. Julesburg soils Typical pedon of Ulm clay loam, 0 to 3 percent slopes, 1,370 feet north and 240 feet west of southeast corner have a dark colored surface layer. Osgood soils have an A sec. 33, T. 1 N., R. 68 W. horizon that is coarser than loamy fine sand and is more than 20 inches thick. Otero and Valent soils lack a B Ap-0 to 5 inches; brown (10YR 5/3) clay loam, dark grayish brown horizon. (Ion; 4/2) moist: moderate fine granular structure; slightly hard. firm:calcareous;mildly alkaline; abrupt smooth boundary. Typical pedon of Vona loamy sand, 0 to 3 percent • RA-5 to 13 inches: brown (10YR 5/3) clay, dark grayish brown (10YR slopes, 180 feet north and 1,400 feet east of southwest 4/2) moist; weak coarse angular blocky structure parting to corner sec. 25, T. 5 N., R. 61 W. moderate medium angular blocky; extremely hard, extremely firm; common moderately thick clay films on faces of peds; calcareous: Al—0 to 6 inches; grayish brown (10YR 5/2) loamy sand, dark grayish mildly alkaline: clear smooth boundary. brown (10YR 4/2) moist; weak fine Baca-13 to 19 inches: pale brown (1018 6/3) clay, brown (10YR 5/31 friable: neutral:clear smooth boundan�dnulrr structure: sift, very moist; weak coarse angular blocky structure; extremely hard, ex- ..V;-6 to 12 inches; grayish brown (10YR 5/2; fine sandy loam. dark tremely firm: few thin clay films on faces of some peds; some tisi- P� grayish brown (10YR 4ve moist; weak coarse s lar block. bur lime in fine seams: calcareous moderately alkaline: gradual structure: slightly hard, very friable; neutral: clear smooth crunda- smor;h boundary. n. 1 .u/ WELD COUNTY, COLORADO, SOUTHERN PART 75 B2R—I2 to 16 inches; brown (IOYR 5/3) fine sandy loam, brown Yo Wiley series- 4/3) moist; moderate medium prismatic tmetureparting t r'moderate medium subangular blocky; hard, friable: few thin clay The Wiley series consists of deep, well drained :liras on faces of peels; neutral;clear smooth boundary. B22t—l6 to a inches: yellowish brown IOYn ey soils -Drown (10YR 4/3) moist; moderate (medium5/4) fine sandy structure loum. that slopes are calcareous to 5 perce percent. Wiley soils are parting to weak medium subangular blocky; n p clay films on faces of peril: neutral;gradual �• friable: few thin Wiley soils are similar to the Renohill and Ulm soils 83-22 a to 28 inches: light yellowish brown (IOYR smooth 4 tine yda d y loam, and are near the Colby, Heidt, and Weld soils. Renohill > ans ld shale between than and 40 lent c, film,the yellowish brown y 5/4) moist: weak coarse S sand blocky structure: slightly hard, very friable; calcareous: mildly alkaline: and onW Colby soils are more 35 percent clay in the B2 clear smooth boundary. horizon. soils lack a B horizon. Cca-28 to 60 inches; light yellowish brown (10YR 6/4)sandy loam,yel- Typical pedon of Wiley silt loam in an area of Wiley- lowish brown(IOYR 5/4) moist: massive: slightly hard, very friable: Colby complex, 1 to 3 percent slopes, in the northeast some visible lime in tine filaments or threads;calcareous: moderate- quarter sec. 34, T. 3 N., R. 68 W. ly alkaline. Thickness of the solum ranges from 18 to 37 inches Coarse fragments Ap—O to 11 inches: pale brown (10YR 6/3)silt loam,dark grayish brown make up 0 to 10 gments (10YR 4/2) moist: weak tine granular structure; very hard, friable: percent of the solum. Depth to free carbonates ranges calcareous; mildly alkaline: clear smooth boundary, from 12 to 24 inches. —11 to 24 The A horizon has value of 5 or 6 dry and 3 to 5 moist and chroma of 62t(10YR 5/3)rnches: pa.le brown moist: weak medium 6/at silty clay loam, brown 2 or 3. It is loamy sand or sandy loam.The B2t horizon is commonly trueprismatic structure parting to sandy loam that is 10 to 18 percent clay. The moderate medium subangular blocky; very hard, firm; few thin clay coarse loamy sand to sandy loam C horizon ranges from films on faces of peels; calcareous: moderately alkaline; gradual smooth boundary. B3ca-2+ to 34 inches; pale brown (10YR 6/3) silty clay loan, brown Weld series (IOYR 5/3) moist: weak medium prismatic structure moderate medium subangular bloc parting to The Weld series consists of deep, well drained soils thatvery hard,moderately some visible lime gradual fne smooth aunts and seams; calcareous: alkaline: formed in calcareous eolian deposits. Weld soils are on smooth boundary, y smooth plains. Slopes are 0 to 5 percent. Cea- 34 to 60 inches; very pale brown(10YR 7/3) silty clay loam, brown (10YR 5/3) moist: massive; very hard, friable; some visible lime in Weld soils are near the Adena, Colby, Nunn, and Wiley fine soft`"asses:calcareous; moderately alkaline. soils. Adena soils have a light colored surface layer and Thickness of the solum ranges from 16 to 40 inches. Typically these solum less than 15 inches thick. Colby soils lack a B soils have free carbonates at the surface. ht^n. Wiley soils have aa light colored surface layer and n e A horizon has hue of 10YR or 2.5Y, value of 5 to 7 dry Y moist, and ehroma of 2 or 3.The B2t horizon is commonly silty clay loam less clay in the B2t horizon. Nunn soils lack an abrupt that is 28 to:35 percent clay. The C horizon is commonly silty clay loam textural boundary between the A and B horizon. or silt loam. Typical pedon of Weld loam, 1 to 3 percent slopes, 2,470 feet south and 200 feet west of northeast corner sec. 35.T. 1 N., R. 61 W. References Ap-0 to 8 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) (I) Arne^� Association of State Highway moist moderate medium granular structure hard, dais. 1970. Standard specifications y (and Transportation) Dili- abrupt modern eom d iu friable; neutral; ingEd for highway materials and methods of sampling and testing.Ed. 10,2. illus. B2It—e to 12 inches; brown (10YR 5/3) light clay, brown (10YR 4/3) (2) American Society for Testing and Materials. 1974. Methods for das- moist; strong fine prismatic structure parting to strong fine angular In of soils for engineering blocky; very ll Re 1974 Annual Book of AS Sotandarrlsses. �P M �lg 2487- moist; hard, firm; many moderately thick clay films on faces Peril: neutral; clear smooth boundary, illus. PP. R�,rt-12 to neutral: inches; pale brown (undo 6/3) hen (3) Colorado Department 75. (10YR 4/15 moist; strong foe prismatic structure clay loam, brown statistics, 1974 Preliminary,Agriculture. FinallBulL 1-975. olorado agniculturd parting to strong (4) United States Department of Agriculture. 1951. Soil survey manual. tine angular blocky; very hard, firm; many moderately thick clay U. S. Dep. Agric. Handb. 18,5U3 films on faces of peds; neutral:clear smooth boundary. B:ka--IS to LV inches: very pale brown (10YR 7/3) loam, pp.. illus. (Supplements replacing United P States e issued May 1902) 1lOYR 6/3 pale parting to Lil si of soil cla of Agriculture. 7975. Soil surveymy it moist: moderate medium prismatic structure ar[in to basic system of soil classification for making soil surveys. Soil moderate medium subangular blocky; hard, friable; few thin clay Conserv. Service, U.S. Dep. A . films on faces of some peds; some visible lime occuring in fine soft gnc. Handh.436, 754 pp illus masses: calcareous; moderately alkaline;clear smooth boundary. Cca—H8 to 60 inches; very pale brown (IOYR 7/3) silt loam, pale brown Glossary (ion 6/3) moist; massive: slightly hard, friable; some visible lime in tine filaments or threads: calcareous: moderately alkaline. Thickness of the solum ranges from 20 to 39 inches. Depth to free car- ABC A soil having an .4,a B,and a C horizon. AC soil. A soil having onlyi an and a C horizon. Commonly such .oil 5mates ranges from 10 to 20 inches. formed in recent alluvium or on steep rocky slopes. Aeration, soil. The exchange of air in soil with air from the aumspher,. The A horizon has value of 4 or 5 dry and 2 or 3 moist and chroma of'or.1. The 132t horizon is commonly light clay or heavy oamThe air r in a wrll aerated soil is similar a y that in the diox- '.i to.��''�-rrent clay. The C horizon is commonlysilt loam clay orl loam. is the air in a poorly o aerated soil is rnnsidenhl}' higher in carbon diox- ide and lower in oxygen. WELD COUNTY, COLORADO, SOUTHERN PART 127 TABLE 12.--E000'LER:NG PROPERTIES AND CLASSIFICATIONS--Ccrcinuel ��—__ -__ • Class:` aat__n 'Fra4- I Fercentsbe oa_s:ng yo-O - , ^ept- I ,,,CA ex::. _ — '.mends ' __ . soave lumber-- _iou:d Flas- .c . .. ' 7n+ _ A . HT, ) m_' icity ____ . inches' a ' 1 47 ,0 _ , index 'd-.c - ?0-= - ' '5-10. - 'e __: c : 3` IWe other ri ___ --- ___ '. ___ ___ ___ I ___ bedrock. __ 5c - Loam :CL-ML 'A-o 7 :-E-Inc:-5-1c2 '72-?5. --' 5-10 ___ e b-I1 Clay loam, loam _ IA-5 0 —5-1001'5-'0: 65-'00 '50-37 30-40 10-20 '4 7nweathered ___ ___ ___ ___ ___ ___ ___ bedrock. ___ ___ Loam - c_9 ,79-100:°5-':: 7 _ c '55-75 7_ ,c _- , ^-'3 ' lay loam, 17am 0 1 . 55-'00 '55-' 00 t J 82 - 10-20 '3 7 b re3 ___ ___ ___ ___ ___ bedrock. ___ ___ ___ Re,/._^L1' 1-9 Clay loam ',A-5 -100,9'0-1 - '130- ',70-30 25_40 1 10-20 3 , 'l 0-321- Clay , clay oam 101, C9 'A--, A-5 � _ 'c°-100190-':: '90-'^.0:75-95 35-65 20-35 32 :Weathered ___ ___ ___ ___ ___ ___ ___ ___ ___ bedrock. -11 Fine sandy loam ML, SM IA-4 7 '95_100190-100170-95 140_65 20-35 NP-5 Tassel 11 :Unweathered ___ ___ ___ ___ ___ ___ ___ ___ ___ bedrock. 0-5 Fine sand; loam 3M, ML IA-2, A-4 0-5 -100,.^5-'C;I7O_?0 30-60 --- NP d-13 'Fine sand/ loam. SM, '"L IA-4 0 100 175-' -170-35 40-60 ___ NP __. sandy loam. ' ','.3-371Fine sandy loam„SM A-2 , A-4 0-5 -100 '5-1 :0'70-55 25-50 --- NP sandy loam, loamy file /"..5 sand. ' bedrock. ' 0-' Loam _-ML IA-= 0-5 _-100'175-':: 70-55 50-'5 . 20-30 5-10 _ � .a_ ._ ' 4-25:Cley loan, _oan, I -"L, IA-5, A-4 0-5 -100 x'155- _C 70-95 140-30 1 25-35 5-15 very fief sandy: CL. loam. I SM-SC SC 25 'Aeathere'. bedrocK. .. ., 0._c1 -lay loam 0_c nn _40 30-40 10-15 -, _ °F-10: '75-' 5_10' nn-30 35-45 20-30 5 i P .. , , __ - 106 SOIL SURVEY - PLF .--SANITAPY FA___I?I.S__Sontinued Septic tanK . ewak _r _h Area -. I acs . °. . areas sand la' dove- ar for andfill . . _ . _. _. I,'.oderate: Slight Slight . ! Fair: !Severe: _igr.t a "slight seep - _eve^=_: !Severe: 'Severe: :Fair: _ .; :: I seepage. ! seepage. I seepage. ! too sandy. :Slight �oJ . . evere: Slight I ht Goo .alope , I see^are. !Severe: .Severe: _ � !severe: �, _ _1 ! seepage. seepage. seepage. :Good. Slicht Severe: Severe: Severe: OJJ. _ _'__ i seepage. seepage. I see^are. ' : Severe: ,Severe: Severe: Slight_ !Fair: percs =lowly, : depth to rook. ' depth to rock. too clayey, depth to rock. thin layer. 7- 4 ST Severe: !Severe: .ere: 'Slight Poor: depth to ___. dept'. t.. rock. ' depth to rock. : thin layer . -._ ;Severe: :Severe: Severe: !Slight Poor: depth to rook. : depth to rock. ' depth to rock. thin laver . Severe: !Severe: !Severe: !Slight -too. penes siowls, depth to depth to rook. too clayey, depth to rook. thin layer . - _ever : . Severe: 'Severe: !Severe: ;Poor: - - deto opt". to rock, depth rook, seepage. ' thin layer, seepage, seepage. ' area reclaim. slope. 'Severe: !Severe: :Slight Fair: - sept . 0- .. I deptr to rook, depth to rock. thin layer , seepage. area reclaim. -, Sevvere: :high Fair: thin layer . __ c__rate: Poor: - . .._ . . to: claye . too clayey. .. else too clayey: toc pansy, small „_ones. . =Jot. .- :.: .. too san Hello