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Home My WebLink About20060624.tiff at 1 4L:41.1.11 1 111 V. au r WELD COUN fY, COLORADO, SOJ.JTHERN PART (FORT LUI 'I'ON QUADRANGLE ) 104;85, ^'j/} it 44.�R h Il4' t ! � },:ry th3 k`n 5ai`h"�' ', �. 'w ! i C " k! i•:•:ii, .:1••••;* ,,,:..„: „;:,:::,.. .,:,,,.;, „ „,,,,,,,„„p„,„,,,,„:„.....,,,„„..4...... i i vw i1 .I ' $ „� nC,,i,i,...,,ii,;!.v.:litri' ini . • pit, r I' ro. # O. t fi„ . �. n14, a 1F 3 . � „•IAt v t `I4iql i i • f N. 73 E{�H t s s i 5t s:gil d !H,vrd y kti a' - ,.• i .• y P :� d ;°i yak dwe •w:! *4 i lx r 4 u4id s k A{ p* ski&I• 6 eiy iit ty Sat iY. ! 4 I e•� � '` _ '° 4's₹₹ iiY '}• 44. it)kgsv 't t •i'i t't y h"v � }4e.s•e. • :p,• 2.? ! d{' • ( t. i qk k' '•4F ''!,p i„= : it' Ilt-.{ .t ,ak ! p I. r k±�a`S N -,C # I iirnry -a ''ii gg i 1•• Y LiiWNI I 1el y, , 'fill!)1,,,;•,-.,-L :j • 4 ( kB (w i '� ,� P p 4oq.ywM„ µ4 q :... !0 k. ' $'' Nk t j • y..: C ,� ii,,, '� „, ug�� E �' 7t' ,',4{• t f�.' y a% •�,'"! 4jT • ... i t � i¢* ! ;R p Sd ' ,id�M ll iik d E C n• r ' 'at ri a • u }ro ' 4 "P y'i 4•4140 • {tlt' ! A.4"`R�h+ ; • . th;: i� h ° !' h c, v}y ,s.. •54414t.••-.!..** y..'( ti i .iii ti. t !�y.1 . i i i it • ' '.4 4`I� .. ., ..i. , .. is :ddi SIR • �� 2006 0624 44.1::.,i,' '+ r Cyr u { • • • w µ�s ~ti h I ' IM"µµ'pp''"` l' • It) ;i. .' ;it r._ i S. C .e 3a6'k *r,x. r • 1 44 SOIL SURVEY f to allow moisture accumulation. Generally precipitation is Permeability is rapid. Available water capacity is low. too low to make beneficial use of fertilizer. The effective rooting depth is 60 inches or more. Surface 'nibble mulch farming, striperopping, and minimum til- runoff is medium, and the erosion hazard is moderate. laz, are needed to control soil blowing and water erosion. The potential native vegetation is dominated by little Terracing also may be needed to control water erosion. bluestem, sideoats grama, sand reedgrass, blue grama, The potential native vegetation is dominated by hairy grama, switchgrass, and needleandthread. Potential western wheatgrass and blue grama. Buffalograss is also production ranges from 700 pounds per acre in favorable present. Potential production ranges from 1,000 pounds years to 200 pounds in unfavorable years. As range condi- per acre in favorable years to 600 pounds in unfavorable tion deteriorates, the tall and mid grasses decrease, blue years. As range condition deteriorates, a blue grama-buf- grama and hairy grama increase, and forage production falograss sod forms. Undesirable weeds and annuals in- drops. vade the site as range condition becomes poorer. Management of vegetation should be based on taking Management of vegetation on this soil should be based half or less of the total annual production. Deferred graz- on taking half and leaving half of the total annual produc- ing is practical in improving range condition. Seeding and tion. Range pitting can reduce runoff. Seeding is desirable mechanical treatment are impractical. if the range is in poor condition. Western wheatgrass, Windbreaks and environmental plantings generally are not suited to these soils. Onsite investigation is needed to blue grama, sideoats grama, buffalograss, pubescent wheatgrass, and crested wheatgrass are suitable for seed- determine if plantings are feasible. ing. The grass selected should meet the seasonal require- Wildlife populations are limited because the necessary habitat elements are lacking. Because most of the acreage ments of livestock. It can be seeded into a clean, firm sorghum stubble, or it can be drilled into a firm prepared is rangeland, only rangeland wildlife, for example scaled success- ful. quail and antelope, are typical. Extreme care is needed in seedbed. Seeding early in spring has proven most suc ful. managing livestock grazing in order to provide suitable Windbreaks and environmental plantings of trees and habitat on these soils. shrubs commonly grown in the area are generally well Potential is poor for urban and recreational develop- suited to this soil. Cultivation to control competing ment. The chief limiting soil features are the loose, coarse vegetation should be continued for as many years as textured soil, steep slopes, and rapid permeability. Capa- bility subclass VIIs irrigated, VIIs nonirrigated; Gravel possible following planting. Trees that are best suited and have good survival are Rocky Mountain juniper, eastern Breaks range site. red"dar, ponderosa pine, Siberian elm, Russian-olive, and 69—Valent sand, 0 to 3 percent slopes. This is a deep, ha. ;rry. The shrubs best suited are skunkbush sumac, excessively drained soil on plains at elevations of 4,650 to 5,100 feet. It formed in eolian deposits. Included in lilac, Siberian peashrub, and American plum. Wildlife is an important secondary use of this soil. The mapping are small areas of soils that have lime within a cropland areas provide favorable habitat for ring-necked depth of 40 inches. pheasant and mourning dove. Many nongame species can Typically the surface layer is brown sand about 8 be attracted by establishing areas for nesting and escape inches thick. The underlying material to a depth of 60 cover. For pheasants, undisturbed nesting cover is essen- inches is brown sand. _ tial and should be included in plans for habitat develop- Permeability is rapid. Available water capacity is ment, especially in areas of intensive agriculture. moderate. The effective rooting depth is 60 inches or land wildlife, for example. the pronghornRange- more. Surface runoff is slow, and the erosion hazard is p antelope, can be low attracted by developing livestock watering facilities, This soil is suited to limited cropping. Intensive managing livestock grazing, and reseeding where needed. This soil haspoor system g is h be limited becausec f erosion. The cropping potential for urban and recreational system should be limited to such close grown crops as al- ;� develop pent. lo dwelling wpermeability and high shrink swell falfa, wheat, and barley. The soil also is suited to ir- and road construction. Capa- rigated pasture. A suitable cropping system is 3 to 4 r bility subclass IIIe irrigated, IVe nonirrigated; Clayey years of alfalfa followed by 2 years of corn and small i/ Plains range site. bins d site, rthents, moderately steep. These are grain and alfalfa seeded with a nurse crop. I deep, excessively drained soils on terrace breaks and Closely spaced contour ditches or sprinkers can be used in irrigating close grown crops. Contour furrows or sprin- i escarpments at elevations of 4,450 to 5,100 feet. They klers should be used for new crops. Applications of bar- formed in gravelly alluvium and have slopes of 9 to 25anure [ and commercial fertilizer help to maintain percent. Included in mapping are small areas of soils that good p oduct on. lave pockets of sandy loam and loam in the underlying The potential vegetation is dominated by sand naterial. t Typically the surface layer is bluestem, sand reedgrass, switchgrass, sideoats grama, tE y pale brown gravelly sand needleandthread, little bluestem, and blue grama. Poten- I shout 10 inches thick. The underlying material to a depth tial production ranges from 2,500 pounds per acre in if 60.-sihes is pale brown gravelly sand. favorable years to 1,800 pounds in unfavorable years. As WELD COUNTY, COLORADO, SOUTHERN PART 45 age condition deteriorates, the sand bluestem, The potential vegetation is dominated by sand chgrass, sand reedgrass, sideoats grama, and little bluestem, sand reedgrass, switchgrass, sideoats grama, tuaestem decrease, forage production drops, and sand needleandthread, little bluestem, and blue grama. Poten- sage increases. Undesirable weeds and annuals invade tial production ranges from 2,500 pounds per acre in and "blowout" conditions can occur as range condition favorable years to 1,800 pounds in unfavorable years. As becomes poorer. range condition deteriorates, the sand bluestem, Management of vegetation on this soil should be based switchgrass, sand reedgrass, sideoats grama, and little on taking half and leaving half of the total annual produc- bluestem decrease, forage production drops, and sand tion. Seeding is desirable if the range is in poor condition. sage increases. Undesirable weeds and annuals invade Sand bluestem, sand reedgrass, indiangrass, switchgrass, and "blowout" conditions can occur as range condition sideoats grama, little bluestem, and blue grama are suita- becomes poorer. ble for seeding. Because this soil is susceptible to soil Management of vegetation on this soil should be based blowing, it should be seeded using an interseeder, or the on taking half and leaving half of the total annual produc- seed should be drilled into a firm, clean sorghum stubble. tion. Seeding is desirable if the range is in poor condition. Seeding early in spring has proven most successful. Brush Sand bluestem, sand reedgrass, indiangrass, switchgrass, management also can help in improving deteriorated side-oats grama, little bluestem, and blue grama are suita- range. ble for seeding. Because this soil is susceptible to soil Windbreaks and environmental plantings are fairly well blowing, it should be seeded using an interseeder or the suited to this soil. Blowing sand and the moderate availa- seed should be drilled into a firm, clean sorghum stubble, ble water capacity are the principal hazards in establish- Seeding early in spring has proven most successful. Brush ing trees and shrubs. The soil is so loose that trees should management can also help in improving deteriorated be planted in shallow furrows, maintaining vegetation range. between the rows. Supplemental irrigation is needed to Windbreaks and environmental plantings are generally insure survival. Trees that are best suited and have good not suited to this soil. Onsite investigation is needed to survival are Rocky Mountain juniper, eastern redcedar, determine if plantings are feasible. ponderosa pine, and Siberian elm. The shrubs best suited Wildlife is an important secondary use of this soil. Ran- are skunkbush sumac, lilac, and Siberian peashrub. geland wildlife, for example, the pronghorn antelope, can Wildlife is an important secondary use of this soil. The be attracted by developing livestock watering facilities, upland areas provide favorable habitat for ring-necked managing livestock grazing, and reseeding where needed. isant and mourning dove. Many nongame species can This soil has fair potential for urban development. The be attracted by establishing areas for nesting and escape chief limiting soil features are the rapid permeability and cover. For pheasants, undisturbed nesting cover is essen- the susceptibility to soil blowing. Septic tank absorption tial and should be included in plans for habitat develop- fields function properly, but in places the sandy sub- ment, especially in areas of intensive agriculture. Range- stratum does not properly filter the leachate. Sewage land wildlife, for example, the pronghorn antelope, can be lagoons must be sealed. Once established, lawns, shrubs, attracted by developing livestock watering facilities, and trees grow well. Capability subclass VIe irrigated, managing livestock grazing, and reseeding where needed. VIe nonirrigated; Deep Sand range site. This soil has fair potential for urban development. The 71—Valent-Loup complex, 0 to 9 percent slopes. This primary limiting soil features are the rapid permeability level to moderately sloping map unit occupies hills, ridges, and the susceptibility to soil blowing. Septic tank absorp- and depression or pothole-like areas in the sandhills at tion fields function properly, but in places the sandy sub- elevations of 4,670 to 4,700 feet. The Valent soil makes up stratum does not properly filter the leachate. Sewage about 60 percent of the unit, the Loup soil about 35 per- lagoons must be sealed. Once established, the lawns, cent. About 5 percent is dune sand. The Valent soil occu- shrubs, and trees grow well. Capability subclass IVe ir- pies the hills and ridges and the Loup soil the depressions rigated, VIe nonirrigated; Deep Sand range site. or potholes. 70—Valent sand, 3 to 9 percent slopes. This is a deep, The Valent soil is deep and excessively drained. It excessively drained soil on plains at elevations of 4,650 to formed in eolian deposits. Typically the surface layer is 5,100 feet. It formed in eolian deposits. Included in brown sand about 8 inches thick. The underlying material mapping are small areas of soils that have lime within a to a depth of 60 inches is brown sand. depth of 40 inches. Also included are small areas of soils Permeability is rapid. Available water capacity is that have sandstone between 40 and 60 inches. moderate. The effective rooting depth is 60 inches or Typically the surface layer of the Valent soil is brown more. Surface runoff is slow, and the erosion hazard is sand about 6 inches thick. The underlying material to a low. depth of 60 inches is brown sand. The Loup soil is deep and poorly drained. It formed in Permeability is rapid. Available water capacity is sandy alluvium. Typically the surface layer is very dark moderate. The effective rooting depth is 60 inches or grayish brown, mottled loamy sand about 16 inches thick. ^-e. Surface runoff is slow, and the erosion hazard is The underlying material to a depth of 60 inches is light brownish gray, mottled loamy sand and sandy loam. 46 SOIL SURVEY permeability is rapid. Available water capacity is yellowish brown fine sandy loam about 16 inches thick. lerate. A water table is at or near the surface in The substratum to a depth of 60 inches is sandy loam. spring and about 36 inches below the surface in fall. Sur- Permeability is moderately rapid. Available water face runoff is slow, and the erosion hazard is low. capacity is moderate. The effective rooting depth is 60 This unit is used for rangeland and wildlife habitat. The inches or more. Surface runoff is slow, and the erosion potential native vegetation on the Valent soil is hazard is low. dominated by sand reedgrass, sand bluestem, blue and In irrigated areas this soil is suited to the crops com- , hairy grama, little bluestem, needleandthread, and monly grown in the area. Perennial grasses and alfalfa or sideoats grama. Potential production ranges from 1,800 close grown crops should be grown at least 50 percent of pounds per acre in favorable years to 1,400 pounds in un- the time. Contour ditches and corrugations can be used in i favorable years. As range condition deteriorates, the sand irrigating close grown crops and pasture. Furrows, con- bluestem, sand reedgrass, sideoats grama, and little tour furrows, and cross slope furrows are suitable for row bluestem decrease; sandhill muhly and blowout grass in- crops. Sprinkler irrigation is also desirable. Keeping til- crease, and forage production drops. "Blowouts" occur as lage to a minimum and utilizing crop residue help to con- range condition becomes poorer. trol erosion. Maintaining fertility is important. Crops The native vegetation on the Loup soil is dominated by respond to applications of phosphorus and nitrogen. switchgrass, little bluestem, sand reedgrass, and western In nonirrigated areas this soil is suited to winter wheat, wheatgrass. Indiangrass, sand bluestem, prairie cordgrass, barley, and sorghum. Most of the acreage is planted to slender wheatgrass, alkali sacaton, saltgrass, sedge, and winter wheat. The predicted average yield is 20 bushels rush are also present. Potential production ranges from per acre. The soil is summer fallowed in alternate years 4,000 pounds per acre in favorable years to 3,000 pounds to allow moisture accumulation. Generally precipitation is • in unfavorable years. As range condition deteriorates, the too low for beneficial use of fertilizer. switchgrass, sand bluestem, indiangrass, little bluestem, Stubble mulch farming, striperopping, and minimum til- • and prairie cordgrass decrease, and saltgrass, blue grama, lage are needed to control soil blowing and water erosion. sand dropseed, sedge, and rush increase. Undesirable Terracing also may be needed to control water erosion. weeds and annuals invade the site as range condition The potential native vegetation on this range site is i becomes poorer. dominated by sand bluestem, sand reedgrass, and blue Seeding with an interseeder is advisable if the range is grama. Needleandthread, switchgrass, sideoats grama, , "'poor condition. Sand reedgrass, sand bluestem, sideoats and western wheatgrass are also prominent. Potential f ama, switchgrass, little bluestem, indiangrass, and blue production ranges from 2,200 pounds per acre in favora- grama are suitable for seeding. Seeding early in spring ble years to 1,800 pounds in unfavorable years. As range has proven most successful. Grazing should be light to condition deteriorates, the sand bluestem, sand reedgrass, prevent range deterioration. and switchgrass decrease and blue grama, sand dropseed, Wildlife is an important secondary use of this unit. On and sand sage increase. Annual weeds and grasses invade the Vaient soil, rangeland wildlife, for example, the the site as range condition becomes poorer. pronghorn antelope, can be attracted by developing Management of vegetation on this soil should be based livestock watering facilities, managing livestock grazing, on taking half and leaving half of the total annual produc- and reseeding where needed. tion. Seeding is desirable if the range is in poor condition. • The Loup soil, which is typically wet and produces an Sand bluestem, sand reedgrass, switchgrass, sideoats abundance of wetland vegetation, attracts wetland wil- grama, blue grama, pubescent wheatgrass, and crested dlife species, such as mallard, teal, geese, and miscellane- wheatgrass are suitable for seeding. The grass selected ous shorebirds. Primary management of this soil for wet- should meet the seasonal requirements of livestock. It land wildlife includes managing livestock grazing, fencing should be drilled into a clean, firm sorghum stubble or a to control livestock, protecting from fire, and preventing prepared seedbed. Seeding early in spring has proven drainage. Natural wetland vegetation should be allowed most successful. to develop. Capability subclass VIe irrigated, Vie nonir- Windbreaks and environmental plantings are fairly well rigated; Valent soil in Choppy Sand Meadow range site, suited to this soil. Blowing sand and low available water Loup soil in Sandy Meadow range site. capacity are the principal hazards in establishing trees 72—Vona loamy sand, 0 to 3 percent slopes. This is a and shrubs. The soil is so loose that trees should be deep, somewhat excessively drained soil on plains and planted in shallow furrows and vegetation maintained high terraces at elevations of 4,600 to 5,200 feet. It between the rows. Supplemental irrigation is needed to formed in eolian or alluvial deposits. Included in mapping insure survival. Trees that are best suited and have good are some leveled areas. Also included are small areas of survival are Rocky Mountain juniper, eastern redeedar, soils that have a loamy substratum and some areas of ponderosa pine, and Siberian elm. The shrubs best suited soils that are noncalcareous to a depth of 60 inches. are skunkbush sumac, lilac, and Siberian peashrub. Typically the surface layer of this Vona soil is grayish Wildlife is an important secondary use of this soil. The rown. The upper 6 inches is loamy sand and the lower 6 cropland areas provide favorable habitat for ring-necked inches is fine sandy loam. The subsoil is brown and light pheasant and mourning dove. Many nongame species can a I WELD COUNTY, COLORADO, SOUTHERN PART 47 be attracted by establishing areas for nesting and escape wheatgrass are suitable for seeding. The grass selected "•er. For pheasants, undisturbed nesting cover is essen- should meet the seasonal requirements of livestock. It can .1 and should be included in plans for habitat develop- be seeded into a clean, firm sorghum stubble, or it can be ment, especially in areas of intensive agriculture. Range- drilled into a firm prepared seedbed. Seeding early in land wildlife, for example, the pronghorn antelope, can be spring has proven most successful. attracted by developing livestock watering facilities, Windbreaks and environmental plantings are fairly well managing livestock grazing, and reseeding where needed. suited to this soil. Blowing sand and low available water This soil has good potential for urban and recreational capacity are the principal hazards in establishing trees development. Once established, the lawns, shrubs, and and shrubs. The soil is so loose that trees should be trees grow well. The chief limiting soil feature is the planted in shallow furrows and vegetation maintained rapid permeability in the substratum, which causes a between the rows. Supplemental irrigation may be needed hazard of ground water contamination from sewage to insure survival. Trees that are best suited and have lagoons. In places recreational development is limited by good survival are Rocky Mountain juniper, western the susceptibility to soil blowing. Capability subclass IIIe redcedar, ponderosa pine, and Siberian elm. The shrubs irrigated, IVe nonirrigated; Sandy Plains range site. best suited are skunkbush sumac, lilac, and Siberian 73—Vona loamy sand, 3 to 5 percent slopes. This is a Peashrub. Wildlife is an important secondary use of this soil. The deep, somewhat excessively drained soil on plains and high terraces at elevations of 4,600 to 5,200 feet. It cropland areas provide favorable habitat for ring-necked formed in eolian or alluvial deposits. Included in mapping pheasant and mourning dove. Many nongame species can be attracted by establishing areas for nesting and escape are some leveled areas. Also included are small areas of soils that have a loamy substratum and some areas of cover. For pheasants, undisturbed nesting cover is essen- soils that are noncalcareous to a depth of 60 inches. tial and should be included in plans for habitat develop- ment, especially in areas of intensive agriculture. Range- Typically the surface layer of this Vona soil is grayish brown. The upper 6 inches is loamy sand and the lower 5 land wildlife, for example, the pronghorn antelope, can be inches is fine sandy loam. The subsoil is brown and light attracted by developing livestock watering facilities, yellowish brown fine sandy loam about 14 inches thick. managing livestock grazing, and reseeding where needed. This soil has good potential for urban and recreational The substratum to a depth of 60 inches is sandy loam. Permeability is moderately rapid. Available water development. Once established, the lawns, shrubs, and pacity is moderate. The effective rooting depth is 60 trees grow well. The primary limiting soil feature is the hes or more. Surface runoff is slow, and the erosion rapid permeability in the substratum, which causes a ...:zard is low. hazard of ground water contamination from sewage This soil is suited to limited cro in Intensive lagoons. In places recreational development is limited by pp g' the susceptibility to soil blowing. Capability subclass IVe cropping is hazardous because of soil blowing. The irrigated, VIe nonirrigated; Sandy Plains range site. cropping system should be limited to such close grown 74—Vona loamy sand, 5 to 9 percent slopes. This is a crops as alfalfa, wheat, and barley. The soil is also suited deep, somewhat excessively drained soil on plains at to irrigated pasture. A suitable cropping system is 3 to 4 elevations of 4,600 to 5,200 feet. It formed in eolian years of alfalfa followed by 2 years of corn and small deposits. Included in mapping are small areas of soils that grain and alfalfa seeded with a nurse crop. have a loamy substratum and areas of soils that are non- Closely spaced contour ditches or sprinklers can be calcareous to a depth of 60 inches. used in irrigating close grown crops. Contour furrows or Typically the surface layer is grayish brown. The upper spinklers should be used for new crops. Application of 6 inches is loamy sand and the lower 4 inches is fine barnyard manure and commercial fertilizer helps to main- sandy loam. The subsoil is brown and light yellowish lain good production. brown fine sandy loam about 12 inches thick. The sub- The potential native vegetation on this range site is stratum to a depth of 60 inches is loamy sand. dominated by sand bluestem, sand reedgrass, and blue Permeability is moderately rapid. Available water grama. Needleandthread, switchgrass, sideoats grama, capacity is moderate. The effective rooting depth is 60 and western wheatgrass are also prominent. Potential inches or more. Surface runoff is medium, and the erosion production ranges from 2,200 pounds per acre in favora- hazard is low. ble years to 1,800 pounds in unfavorable years. As range The potential native vegetation on this range site is condition deteriorates, the sand bluestem, sand reedgrass, dominated by sand bluestem, sand reedgrass, and blue and switchgrass decrease and blue grama, sand dropseed, grama. Needleandthread, switchgrass, sideoats grama, and sand sage increase. Annual weeds and grasses invade and western wheatgrass are also prominent. Potential the site as range condition becomes poorer. production ranges from 2,200 pounds per acre in favora- Management of vegetation on this soil should be based ble years to 1,800 pounds in unfavorable years. As range on taking half and leaving half of the total annual produc- condition deteriorates, the sand bluestem, sand reedgrass, tion. Seeding is desirable if the range is in poor condition. and switchgrass decrease and blue grama, sand dropseed, .end bluestem, sand reedgrass, switchgrass, sideoats and sand sage increase. Annual weeds and grasses invade .ma, blue grama, pubescent wheatgrass, and crested the site as range condition becomes poorer. 94 SOIL SURVEY TABLE 4.--ACREAGE AND PROPORTIONATE EXTENT OF THE SOILS ,ice-- ap M Soil name Acres Percent symbol 1 Altvan loam, 0 to 1 percent slopes 19,740 1 .7 2 Altvan loam, 1 to 3 percent slopes 2, 140 0.2 3 Aquolls and Aquents, gravelly substratum 34,030 3.0 4 Aquolls and Aquepts, flooded 22,530 2 n 5 Ascalon sandy loam, 1 to 3 percent slopes 12,280 1 .1 6 Ascalon sandy loam, 3 to 5 percent slopes 8,452 0.7 7 Ascalon sandy loam, 5 to 9 percent slopes 640 0.1 8 Ascalon loam, 0 to 1 percent slopes 4,290 0.4 9 Ascalon loam, 1 to 3 percent slopes 960 0.1 10 Bankard sandy loam, 0 to 3 percent slopes 19,980 1 .7 11 Bresser sandy loam, 0 to 1 percent slopes 1,620 0.1 12 Dresser sandy loam, 1 to 3 percent slopes 1 ,220 0. 1 13 ;Cascajo gravelly sandy loam, 5 to 20 percent slopes 1 ,830 0.2 14 ;Colby loam, 0 to 1 percent slopes 7,748 0.7 15 ;Colby loam, 1 to 3 percent slopes 19,310 1.7 16 Colby loam, 3 to 5 percent slopes 7,220 0.6 17 ;Colby loam, 5 to 9 percent slopes 3,930 0.3 18 ',Colby-Adena loams, 3 to 9 percent slopes 21 ,060 1 .8 19 Colombo clay loam, 0 to 1 percent slopes 9,110 0.8 20 Colombo clay loam, 1 to 3 percent slopes 4,120 0.4 21 Dacono clay loam, 0 to 1 percent slopes 10,960 1 .1 22 Dacono clay loam, 1 to 3 percent slopes 1 ,300 0.1 23 Fort Collins loam, 0 to 1 percent slopes 880 0.1 24 Fort Collins loam, 1 to 3 percent slopes 2,540 0.2 25 Haverson loam, 0 to 1 percent slopes 10,890 0.9 26 Haverson loam, 1 to 3 percent slopes 9,290 0.8 27 Heldt silty clay, 1 to 3 percent slopes 2,170 0.2 28 Heldt silty clay, 3 to 5 percent slopes 140 * 29 Julesburg sandy loam, 0 to 1 percent slopes 6,920 0.6 30 Julesburg sandy loam, 1 to 3 percent slopes 2,040 0.2 31 Kim loam, 0 to 1 percent slopes 4,150 0.4 32 ,Kim loam, 1 to 3 percent slopes ' 33 Kim loam, 3 to 5 percent slopes 40,960 0.6 7,090 0.6 34 Kim loam, 5 to 9 percent slopes 6,250 0.5 35 Loup-Boel loamy sands, 0 to 3 percent slopes 11,950 1 .0 36 Midway-Shingle complex, 5 to 20 percent slopes 1 ,630 0.1 37 Nelson fine sandy loam, 0 to 3 percent slopes 3,820 0.3 38 Nelson fine sandy loam, 3 to 9 percent slopes 6,210 0.5 39 Nunn loam, 0 to 1 percent slopes 7,74,7 0.7 40 Nunn loam, 1 to 3 percent slopes 16,520 1 .4 41 Nunn clay loam, 0 to 1 percent slopes 20,900 1 .9 42 Nunn clay loam, 1 to 3 percent slopes 18,940 1 .6 43 Nunn loamy sand, 0 to 1 percent slopes 2,320 0.2 44 Olney loamy sand, 1 to 3 percent slopes 19,950 1 .7 45 Olney loamy sand, 3 to 5 percent slopes 3,339 0.3 46 Olney fine sandy loam, 0 to 1 percent slopes 8,730 9.8 47 Olney fine sandy loam, 1 to 3 percent slopes 58,300 5. 1 48 Olney fine sandy loam, 3 to 5 percent slopes 15,040 1 .3 49 Osgood sand, 0 to 3 percent slopes 38,100 3.3 50 Otero sandy loam, 0 to 1 percent slopes 4, 190 0.4 51 Otero sandy loam, 1 to 3 percent slopes 30,970 2.7 52 Otero sandy loam, 3 to 5 percent slopes 13,440 1 .2 53 Otero sandy loam, 5 to 9 percent slopes - 6,710 0.6 54 Paoli loam, 0 to 1 percent slopes 55 Paoli loam, 1 to 3 percent slo es 600 7. 1 p 250 56 Renohill clay loam, 0 to 3 percent slopes 4,020 0. 3 57 Renohill clay loam, 3 to 9 percent slopes 4,860 0.4 58 Shingle loam, 1 to 3 percent slopes 1 ,540 0. 1 59 Shingle loam, 3 to 9 percent slopes 1 , 160 0. 1 60 Shingle-Renohill complex, 3 to 9 percent slopes 1 ,090 C. 1 61 Tassel fine sandy loam, 5 to 20 percent slopes 6, 140 0.5 62 Terry fine sandy loam, 0 to 3 percent slopes 1 ,990 0.2 63 Terry fine sandy loam, 3 to 9 percent slopes 6,800 0.6 64 Thedalund loam, 1 to 3 percent slopes 7,580 7 65 Thedalund loam, 3 to 9 percent slopes 3,600 0.3 66 Ulm clay loam, 0 to 3 percent slopes 4,610 0.4 67 Ulm clay loam, 3 to 5 percent slopes 2,310 0.2 68 Ustic Torriorthents, moderately steep 2,900 0.3 69 Valent sand, 0 to 3 percent slopes 65,9`.'7 5.7 71-8 70 Valent sand, 3 to 9 percent slopes 174,010 15.0 See footnote at end of table. WELD COUNTY, COLORADO, SOUTHERN PART 95 TABLE 4.--ACREAGE AND PROPORTIONATE EXTENT OF THE SOILS--Continued Soil name Acres Percent s,, .00l 71 Valent-Loup complex, 0 to 9 percent slopes 3,529 0.3 72 Vona loamy sand, 0 to 3 percent slopes 66,670 5.8 73 Vona loamy sand , 3 to 5 percent slopes 18,390 1 .5 74 Vona loamy sand, 5 to 9 percent slopes 31 ,045 2.7 75 Vona sandy loam, 0 to 1 percent slopes 5,260 0.5 76 Vona sandy loam, 1 to 3 percent slopes 14,500 1 .3 77 Vona sandy loam, 3 to 5 percent slopes 6,310 0.5 78 Weld loam, 0 to 1 percent slopes 5,820 0.5 79 Weld loam, 1 to 3 percent slopes 60,470 5.2 80 Weld loam, 3 to 5 percent slopes 2,300 0.2 81 Wiley-Colby complex, 0 to 1 percent slopes 790 0.1 82 ;Wiley-Colby complex, 1 to 3 percent slopes 26,615 2.3 83 ;Wiley-Colby complex, 3 to 5 percent slopes 6,870 0.6 (Water 17,750 1 .5 Total 1 , 152,000 100.0 * Less than 0.1 percent. 98 SOIL SURVEY '... 1 TABLE 5.--YIELDS PER ACRE OF IRRIGATED CROPS--Continued Soil name and Beans, map symbol Alfalfa hay;Sugar beets1 Corn Corn silage dry pinto Onions Potatoes Ton Ton Bu Ton Lb Sack Cwt 401ne 5.5 23 160 33 2400 525 325 • 48 4.0 . --- 100 25 1800 --- --- • Olney • 49 3.0 80 20 Osgood --- ---0 50tero 5.5 23 170 33 2400 525 325 51 5.0 22 150 30 1800 500 Otero 52 4.0 18 100 25 --- ___ Otero 53 3.0 80 20 Otero -` --- 54 Paoli 5.0 23 180 35 2700 --- 350 • 55 Paoli 5.0 23 160 33 200 --- 325 • 56 3.0 18 100 25 --- Renahill --- -'- 57 2.0 80 20 R enohi:l --- --- 5: 2.0 17 S.. .,g le • ___ ___ • 59 __ ___ Shingle 60 --- Shingle --- 61 --- --- ___ Tassel 62 4.0 20 120 30 2400 ___ ___ Terry 63 3.0 ___ 70 25 Terry --- -" --- 64 4.0 - 20 130 30 2400 Thedalund - --- --- 65 3.0 ', 80 25 Thedalund 65 5.5 -- 160 33 -- Ulm -- 67 4.0 --- 100 25 Ulm 58** ___ ___ ___ ___ Ustie Torriorthents 69, 70 3.5 --- 80 22 --- Valent 7tr- V t See footnote at end of table. _-_ 1 WELD COUNTY, COLORADO, SOUTHERN PART 99 TABLE 5.--YIELDS PER ACRE OF IRRIGATED CROPS--Continued Soil name and Beans, map symbol Alfalfa hay Sugar beets', Corn Corn silage dry pinto Onions Potatoes Ton Ton Bu Ton Lb Sack Cwt 72 4.5 20 140 30 --- --- 275 Vona 73 3.5 --- 80 22 --- --- Vona 7q ' Vona 75 5.0 23 160 30 2400 525 - 325 Vona 75 4.5 20 140 30 1800 525 325 Vona 77 4.0 18 1C0 25 --- --- Vona 78 5.5 24 180 35 2700 --- --- Weld 79 5.5 23 160 33 2400 --- ___ Weld 80 4.0 20 100 25 1800 --- --- Weld 81 5.5 24 180 35 2700 --- --- Wiley 5.5 23 160 33 2400 --- --- ley 83 4.0 20 100 25 1800 --- --- Wiley • Yields are for areas protected from flooding. • See map unit description for the composition and behavior of the map unit. • WELD COUNTY, COLORADO, SOUTHERN PART 103 TABLE 6.--BUILDING SITE DEVELOPMENT--Continued Soil name and Shallow Dwellings Dwellings Small Local roads map symbol excavations without with commercial and streets basements basements buildings • 66, 67 ,Moderate: Severe: Severe: Severe: Severe: Ulm too clayey. shrink-swell. shrink-swell. shrink-swell. low strength, shrink-swell. _ 68* Severe: :Moderate: Moderate: Moderate: Moderate: Ustic small stones, ; slope. slope. slope. slope. Torriorthents cutbanks cave. 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 LSlight Slight Slight Slight Moderate: Vona low strength. 73, 74 Slight Slight Slight Moderate: Moderate: Vona slope. low strength. 75, 76 Slight Slight Slight Slight Moderate: Vona low strength. ....--4,.. Slight Slight Slight 'Moderate: Moderate: ,ona slope. low strength. 78, 79 Slight :Moderate: :Moderate: Moderate: : Moderate: Weld 1 low strength, I low strength, low strength, low strength, shrink-swell. shrink-swell . shrink-swell. shrink-swell, frost action. 80 Slight ;Moderate: :Moderate: Moderate: Moderate: Weld ; low strength, low strength, low strength, low strength, 1 shrink-swell. I shrink-swell . slope, shrink-swell , shrink-swell. frost action. 81*, 82*: Wiley Slight Moderate: Moderate: 'Moderate: Moderate: I low strength, low strength, low strength, low strength, I shrink-swell. shrink-swell. shrink-swell. , shrink-swell . Colby Slight (Slight Slight -. Slight ',Moderate: I low strength. 83*: Wiley Slight ;Moderate: Moderate: Moderate: :Moderate: low strength, low strength, low strength, ; low strength, shrink-swell. shrink-swell. slope, 1 shrink-swell. shrink-swell. Colby Slight (Slight Slight ,Moderate: ',Moderate: I slope. I low strength. * See map unit description for the composition and behavior of the map unit. 106 SOIL SURVEY7 TABLE 7.--SANITARY FACILITIES--Continued it name and Septic tank Sewage lagoon Trench Area Daily cover map symbol absorption areas sanitary sanitary for landfill fields landfill landfill 43 Severe: ;Moderate: Slight Slight Nunn percs slowly. 1 excess humus. g Fair: too clayey. 44, 45, 46, 47, 48-- Slight ;Severe: Slight Slight Good. Olney ; seepage. 49 Slight ;Severe: Severe: Severe: Fair: Osgood 1 seepage. seepage. seepage, too sandy. • 50, 51 , S2 Slight ;Severe: Slight Slight Good. I• Otero seepage. 53 Slight ;Severe: Slight Slight Good., Otero ; slope, 1 seepage. 54 Slight ;Severe: Severe: Severe: Good. Paoli : seepage. seepage. seepage. 1 55 Slight ;Severe: Severe: Severe: Good. Paoli I seepage. seepage. seepage. i I 56, 57 Severe: ',Severe: Severe: Slight Fair: I Renohill percs slowly, ; depth to rock. depth to rock, too clayey, depth to rock. thin layer. 58, 59 Severe: ;Severe: Severe: Slight Poor: Shingle depth to rock. ; depth to rock. depth to rock. thin layer. 60*: Shingle Severe: ;Severe: Severe: ;Slight Poor: 28m•-, depth to rock. ; depth to rock. depth to rock, thin layer. Rt .ill Severe: ;Severe: Severe: Slight Fair: percs slowly, 1 depth to rock, depth to rock. too clayey, depth to rock. thin layer. 61 Severe: Severe: Severe: Severe: Poor:Tassel depth to rock, depth to rock, depth to rock, seepage. thin layer, seepage, seepage. area reclaim. slope. 62, 53 Severe: Severe: Severe: Slight Fair: Terry depth to rock. depth to rock, depth to rock. thin layer, seepage. 11 area reclaim. 64, 65 ',Severe: ',Severe: ,'Severe: ;Slight Fair: Thedalund depth to rock. I depth to rock. ; depth to rock. thin layer, 56 Severe: ;Slight ;Moderate: :Slight Ulm percs slowly. ; too clayey. g Poor: Y Y too clayey. 67 Severe: ',Moderate: ;Moderate: ;Slight Poor: Ulm percs slowly. I slope. ; too clayey. too clayey. 68* Moderate: ;Severe: ',Severe: ;Severe: Poor:Ustic Torriorthents slope. I seepage, I seepage, I seepage. too sandy, I small stones. I too sandy. small stones, 69, 70 Slight ',Severe: ;Severe: Severe: Poor: Valent Iseepage. I too sandy, seepage. too sandy. I seepage. • 71*: , Valent Slight ;Severe: Severe: Severe: Poor: i seepage. too sandy, seepage. too sandy. seepage. 8.-1' footnote at end of table. • 1 • WELD COUNTY, COLORADO, SOUTHERN PART 107 TABLE 7.--SANITARY FACILITIES--Continued Soil name and Septic tank Sewage lagoon Trench Area Daily cover map symbol absorption areas sanitary sanitary for landfill fields landfill landfill 71*: Loup Severe: Severe: Severe: Severe: Poor: wetness, wetness, wetness, wetness, wetness. floods. seepage, seepage, seepage, floods. floods. floods. 72, 73 Slight Severe: Slight Slight Good. Vona seepage. 74 Slight Severe: Slight Slight Good. Vona seepage, slope. 75, 76, 77 ;Slight Severe: Slight Slight Good. Vona seepage. 78 ;Moderate: Moderate: Slight Slight Good. Weld i percs slowly. seepage. 79, 80 ;Moderate: Moderate: Slight Slight Good . Weld ; percs slowly. slope, seepage. 81*: Wiley Moderate: Moderate: Slight Slight Fair: percs slowly. seepage. too clayey. Colby Slight Moderate: Slight Slight Good. seepage. , 83*: ley Moderate: Moderate: Slight Slight Fair: percs slowly. seepage, too clayey. slope. Colby Slight Moderate: Slight Slight Good. seepage. * See map unit description for the composition and behavior of the map unit. 110 SOIL SURVEY TABLE 8.--CONSTRUCTION MATERIALS--Continued Soil name and Roadfill Sand Gravel Topsoil map symbol 60*: Renohill Poor: Unsuited Unsuited low strength, Poor: thin layer. thin layer. 61 Poor: Unsuited Tassel thin layer, Unsuited ;Poor: area reclaim, area reclaim. 62, 63 Poor: Unsuited: Unsuited: Fair:Terry thin layer, thin layer. thin layer. small stones. area reclaim. 64, 65 Poor: Unsuited Thedalund thin layer. Unsuited ICood. 66, 67 Poor: Unsuited Ulm shrink-swell, Unsuited Fair: ; low strength. too clayey. 68* Good Good Ustic Torriorthents Good Poor: ; small stones, too sandy. 69, 70 Good Fair Valent Unsuited Poor: too sandy. 71*: Valent Good Fair Unsuited Poor: too sandy. 'Soup Poor: Fair: Unsuited: ;Poor: wetness. excess fines. excess fines. wetness. 72, 73, 74, 75, 76, - I 77 Fair: Poor: Unsuited Good. Vona low strength. excess fines. 78, 79, 80 Fair: Unsuited Unsuited Weld low strength, Fair: shrink-swell, too clayey. frost action. 81*, 82*, 83*: Wiley Fair: Unsuited Unsuited low strength, iFair. shrink-swell. too clayey. Colby ;Fair: Unsuited Unsuited 1 low strength. :Good. * See map unit description for the composition and behavior of the map unit. 114 SOIL SURVEY TABLE 9.--WATER MANAGEMENT--Continued oil name and Pond Embankments, Drainage Irrigation Terraces Grassed Tap symbol reservoir dikes, and and waterways areas levees diversions T 63 Slope, ',Piping, Slope, Slope, Slope, Slope, Terry depth to rock, ; thin layer . rooting depth. rooting depth, depth to rock, rooting depth, seepage. soil blowing. soil blowing. soil blowing. 64 Depth to rock, Low strength, Slope, Slope, Depth to rock Rooting depth. Thedalund slope. piping, depth to rock. rooting depth. thin layer. 65 Depth to rock, Low strength, Slope, Slope, Depth to rock Slope, Thedalund slope. piping, depth to rock. rooting depth. rooting depth. thin layer. E5 Favorable Low strength, Favorable Peres slowly, Peres slowly--- Erodes easily. Ulm shrink-swell, erodes easily. compressible. 67 Slope Low strength, Slope Slope, Peres slowly--- Erodes easily. Ulm shrink-swell, peres slowly, compressible. erodes easily. 68* Seepage, Seepage Slope Slope, Too sandy, Droughty, Ustic slope. droughty. slope, slope. Torriorthents 69 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily. Valent slope. seepage. erodes easily, piping. droughty. 70 Seepage, Piping, Slope Slope, Erodes easily, Slope, Valent slope. seepage. erodes easily, piping, erodes easily. droughty. Valent Seepage, Piping, Slope Slope, Erodes easily, Slope, slope, seepage. erodes easily, piping. erodes easily. droughty. Loup Seepage Seepage, Poor outlets, Wetness, Not needed Not needed. piping. cutbanks cave, seepage. 72, 73 Seepage, Piping, Slope Slope, Piping, Erodes easily. Vona slope. erodes easily, fast intake, erodes easily. seepage. seepage. 74 Seepage, Piping, Slope Slope, Piping, Slope, Vona slope. , erodes easily, fast intake, erodes easily. erodes easily. seepage. seepage. 75 Seepage, Piping, ',Favorable ',Fast intake, Piping, Erodes easily. Vona slope. erodes easily, ; seepage. erodes easily. seepage. 76, 77 Seepage, ;Piping, Slope ',Slope, Piping, Erodes easily. Vona slope. ; erodes easily, fast intake, erodes easily. seepage. seepage. 78 Seepage Low -- Peres slowly---strength--- g IP Percs slowly, ',Piping, Peres slowly. slow intake. ', peres slowly. 79, 80 Seepage Low strength--- Slope, Slope, ',Piping, Peres slowly. Weld peros slowly. peres slowly, ; percs slowly. slow intake. 81*: Wiley Slope, Piping, ',Peres slowly---', Favorable Piping Erodes easily. seepage. low strength. Colby Seepage !Low strength, ,'Favorable Favorable Favorable Favorable. ..--- piping. . See footnote at end of table. WELD COUNTY, COLORADO, SOUTHERN PART 119 ..-- TABLE 10.--RECREATIONAL DEVELOPMENT--Continued Soil name and Camp areas Picnic areas Playgrounds Paths and trails map symbol 60*: Renohill ',Moderate: Moderate: Severe: Moderate: pesos slowly, too clayey. slope. too clayey. too clayey. 51 Moderate: Moderate: Severe: ',Slight. Tassel slope. slope, depth to rock, slope. 52 Moderate: Moderate: Moderate: Moderate: Terry dusty. dusty, dusty, dusty. depth to rock. 63 Moderate: ;Moderate: Severe: Moderate: Terry dusty. ; dusty. slope. dusty. 64 Moderate: ;Moderate: Moderate: Slight. Thedalund dusty. 1 dusty. slope, depth to rock, dusty. 55 Moderate: ;Moderate: Severe: Slight. Thedalund dusty. ; dusty. slope. 55 Moderate: Moderate: , Moderate: Moderate: Ulm peres slowly, too clayey. peres slowly, too clayey. too clayey. 57 Moderate: Moderate: Moderate: Moderate: Ole peres slowly, too clayey. peres slowly, too clayey. too clayey. too clayey, slope. 52* Severe: Severe: Severe: Severe: Ustic Torriorthents small stones, small stones, slope, small stones, too sandy. too sandy. small stones, too sandy. too sandy. 69 Moderate: ',Moderate: Severe: Severe: Valent too sandy, too sandy, too sandy. too sandy. dusty, dusty. 70 Moderate: Moderate: Severe: Severe: Valent too sandy, too sandy, too sandy, too sandy. dusty. dusty. slope. 71*: Valent Moderate: 'i Moderate: Severe: Severe: too sandy, too sandy, too sandy, too sandy. dusty. dusty. slope. Loup Severe: Severe: Severe: Severe: wetness , wetness. wetness. wetness. floods. 72 Moderate: ,'moderate: Moderate: Moderate: Vona too sandy, too sandy , too sandy, too sandy, dusty. dusty. dusty. dusty. 73 Moderate: Moderate: Moderate: Moderate: Vona too sandy, too sandy , too sandy, too sandy, dusty. dusty. slope, dusty. dusty. 74 Moderate: ', Moderate: Severe: Moderate: Vona too sandy, too sandy, slope. too sandy, dusty. lusty. dusty. See footnote at end of table. WELD COUNTY, COLORADO, SOUTHERN PART 123 TABLE 11.--WILDLIFE HABITAT POTENTIALS--Continued Potential for habitat elements 1 Potential as habitat for-- _ Soil name and Wild map symbol Grain : Grasses herba- 1 Shrubs 1 Wetland Shallow lOpenland 1 Wetland Rangeland and seed 1 and ceous plants water ',wildlife ',wildlife wildlife crops** 1 legumes plants areas 68* Very poor:Very poor Poor Poor Very poor Very poor',Very poor',Very poor Poor . Ustic Torriorthents 69, 70 Poor :Fair Fair Fair Very poor Very poor;Fair :Very poor',Fair. Valent 71*: Valent Poor ;Fair :Fair Fair Very poor Very poor',Fair IVery poor',Fair . Loup (Poor :Fair :Good Fair Good ,Good :Fair (Good ',Fair. 72, 73 Fair Good :Fair Fair Poor Very poor;Fair Very poor;Fair . Vona 74 :Poor Good :Fair Fair Very poor Very poor:Fair Very poor Fair. Vona I 75, 76 Good Good :Fair Fair Poor Very poor Good Very poor Fair . Vona 77 Fair Good :Fair Fair Very poor Very poor:Fair Very poor Fair. Vona 78, 79 Good Good :Fair Poor Poor Very poor Good ,Very poor Poor. Weld 80 Fair Good Fair Poor Poor ,Very poor Fair IVery poor Poor. Weld ,.---'.* 82*: .iley Good Good Fair Fair Poor :Very poor:Good Very poor Poor. Colby Good Good Fair Fair Poor :Very poor Good Very poor Fair. 83*: Wiley Fair Good :Fair Fair Poor :Very poor Fair Very poor:Fair. Colby Fair Good :Fair Fair Poor :Very poor Fair Very poor:Fair. * See map unit description for the composition and behavior of the map unit. ** Potential for grain and seed crops, grasses and legumes, and for openland wildlife based on irrigated land use. '8-8 WELD COUNTY, COLORADO, SOUTHERN PART 127 TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS--Continued ' 1 Classification Frag- Percentage passing Soil name and Depth; USDA texture ments sieve number-- Liquid P1as- map symbol Unified ; AASHTO I > 3 limit ticity ' _ finches, 4 10 40 200 index in ; Pct Pct 56, 57 0-9 I Clay loam ;CL ',A-6 0 85-100;80-100 80-95 70-80 25-40 10-20 Renohill 9-32IClay, clay loam ICL, CH A-7, A-6 0 95-100;90-100 90-100 75-95 35-65 20-35 32 :Weathered --- --- -__ bedrock. I 58, 59 0-6 Loam CL-ML A-4 0-5 75-100 75-100 70-95 55-75 25-35 5-10 Shingle 6-18 Clay loam, loam CL A-6 0 75-100 75-100 65-100 50-80 30-40 10-20 18 Unweathered --- --- ___ ___ ___ ___ ___ ___ --- bedrock. 60*: Shingle 0-6 Loam CL-ML A-4 0-5 75-100 75-100 70-95 55-75 25-35 5-10 6-18 ,Clay loam, loam CL A-6 0 75-100 75-100 65-100 50-80 30-40 10-20 18 ;Unweathered --- --- --- --- ___ ___ ___ ___ ___ ; bedrock. Renohill 0-9 1 Clay loam CL A-6 0 85-100 80-100 80-95 70-80 25-40 10-20 9-32IClay, clay loam ICL, CH A-7, A-6 0 95-100 90-100 90-100 75-95 35-65 20-35 32 (Weathered ; --- --- ___ ___ ___ ___ ___ ___ ___ bedrock. 61 0-11 Fine sandy loam ;ML, SM A-4 0 95-100 90-100 70-95 40-65 20-35 NP-5 Tassel 11 ,Unweathered ___ --- --- --- ___ ___ ___ ___ ___ I bedrock. 62, 63 0-6 (Fine sandy loam ISM, ML A-2, A-4 0-5 75-100 75-100 70-90 30-60 --- NP Terry 6-18 :Fine sandy loam, ;SM, ML A-4 0 75-100 75-100 70-85 40-60 --- NP sandy loam. 18-37 Fine sandy loam, ;SM A-2, A-4 0-5 75-100 75-100 70-85 25-50 --- NP sandy loam, ..--2 loamy fine sand. 37 Weathered --- --- --- --- ___ ___ ___ ___ --- bedrock. 64, 65 0-8 Loam CL-ML A-4 0-5 80-100 75-100 70-95 50-75 20-30 5-10 Thedalund 8-25 Clay loam, loam, CL-ML, A-6, A-4 0-5 80-100 75-100 70-95 40-80 25-35 5-15 very fine sandy CL, loam. SM-SC, SC 25 Weathered --- --- --- ___ ___ ___ ___ ___ --- bedrock, 56, 67 0-5 1 Clay loam ICL A-6 0-5 95-100 95-100 80-100 70-80 30-40 10-15 Ulm 5-191 Clay loam, clay ;CL A-6, A-7 0-5 75-100 75-100 75-100 60-80 35-45 20-30 19-60 Clay loam ',CL A-6 0-5 75-100 75-100 75-100 60-80 30-40 15-20 68* ', 0-60 Variable --- ___ --- --- ___ ___ ___ ___ ___ Ustic Torriorthents ; 69, 70 ; 0-8 ;Fine sand SM ',A-2 0 100 100 80-95 10-30 --- NP Valent ; 8-60;Fine sand , sand SP-SM, SM',A-2, A-3 0 100 95-100 75-90 5-20 --- NP 71*: Valent 0-8 ;Fine sand ;SM, ;A-2 0 100 100 80-95 10-30 --- NP 8-60'Fine sand, sand ',SP-SM, SM',A-2, A-3 0 100 95-100 75-90 5-20 --- NP Loup 0-16 Loamy sand ;A-2 0 100 100 50-100 15-30 --- NP 16-60 Fine sand , loamy SP-SM, SM;A-2, A-3 0 100 100 65-100 5-20 --- NP sand , sand . See footnote at end of table. /-` 128 SOIL SURVEY TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS--Continued r"^ ; Classification ;Frag- Percentage passing Soil name and Depth USDA texture ;ments sieve number-- map symbol AASHTO > - limit ticityFlas- Unified 3 ----- limit ;inches, 4 10 40 200 index In -- Pct - _ _--_. _- _i Pct 72, 73, 74 0-6 Loamy sand SM IA-2 0 100 190-100 60-90 ;15- 0 Vona 6-28 Fine sandy loam, SM ;A-2, A-4 ; 0 100 3 --- NP ;90-100 60-90 ;30-45 --- NP sandy loam. 28-60 Sandy loam, SM ;A-2 0 100 ;90-100 50-85 115-30 --- NP loamy sand. 75, 76, 77 0-6 Sandy loam SM IA-2, A-4 0 100 190-100 60-90 '30-45 Vona 6-28 Fine sandy loam, SM ;A-2, A-4 0 100 90-100 60-90 ;30-45 NP sandy loam. --- NP 28-60 Sandy loam, SM A-2 0 ; 100 90-100 50-85 115-30 NP loamy sand. _ --- 78, 79, 80 0-8 Loam Weld CL-ML M A-4 0 100 95-100 85-100 60-85 20-30 4P-10 8-15 Silty clay loam, CL A-6, 4-7 0 ; 100 100 95-100 85-95 35-50 15-30 silty clay. 15-60 Silt loam, loam CL-ML, CL A-4, A-6 0 100 95-100 85-100 60-85 20-35 5-15 81*, 82*, 83*: Wiley 0-11 Silt loam CL-ML, CL A-4, A-6 0 ; 100 100 90-100 70-90 25-35 5-15 11-60 Silty clay loam, CL A-6 0 100 100 90-100 70-95 25-35 10-20 silt loam. Colby 0-7 Loam CL-ML A-4 0 100 100 90-100 85-100 25-30 5-10 7-60 Silt loam, loam CL-ML A-4 0 100 100 90-100 85-100, 25-30 5-10 * See map unit description for the composition and behavior of the map unit. WELD COUNTY, COLORADO, SOUTHERN PART 131 TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS--Continued I Risk of corrosion Erosion Wind Soil name and Depth; Permea- Available Soil Salinity', Shrink- 1 factors erodi- map symbol bility water reaction ' swell ;Uncoated Concrete bility capacity ;potential 1 steel K T group In In/hr In/in pH Mmhos/em; 60*: Renohill 0-9 0.2-0.6 0.17-0.21 6.6-7.8 <2 ,Moderate ;High Low 0.37- 3 6 9-32 0.06-0.2 0. 14-0. 16 6.6-8.4 <2 High ;High Low 0.32 32 --- --- --- --- 61 0-11 2.0-6.0 0.16-0.18 7.4-8.4 <2 Low ;High Low 0.24 1 3 Tassel 11 ___ --- -__ ___ , 62, 63 0-6 2.0-6.0 0.13-0. 15 7.0-7.8 <2 Low ;Moderate Low 0.20 2 3 Terry 6-18 2.0-6.0 0.13-0.15 7.0-7.8 <2 Low Moderate Low 0.20 18-37 2.0-6.0 0. 13-0. 15 7.9-8.4 <2 Low High Low 0.20 37 --- --- --- 64, 65 0-8 0.6-2.0 0.16-0.18 7.9-8.4 <2 ;Low High Low 0.32 2 4L Thedalund 8-25 0.6-2.0 0.16-0. 18 7.9-8.4 <2 ILow High Low 0.32 25 ___ ___ ___ ___ 66, 67 0-5 0.6-2.0 0.16-0.18 6.6-7.8 --- :Low High Low 0.32 5 6 Ulm 5-19 0.06-0.2 0.19-0.21 7.4-8.4 <2 ;High High Low 0.37 19-60 0.6-2.0 0.19-0.21 7.9-8.4 <2 ;Moderate High Low 0.37 68* 0-60 --- _ Ustic Torriorthents 69, 70 0-8 6.0-20 0.07-0.12 6.6-7.3 --- Low Low Low 0.10 5 1 Valent 8-60, 6.0-20 0.05-0. 10 6.6-7.8 <2 Low Low Low 0.10 71*: Valent 0-8 ; 6.0-20 ;0.07-0.12 6.6-7.3 --- Low Low Low 0.10 5 1 ' 8-60 ; 6.0-20 0.05-0. 10 6.6-7.8 <2 Low Low Low 0. 10 JP 0-161'1 6.0-20 10.10-0.14 6.6-8.4 <2 ;Low High Low 0. 17 5 2 16-60; 6.0-20 0.06-0.08 7.4-8.4 <2 ;Low High Low 0.17 72, 73, 74 0-6 16.0-20 0.09-0. 11 6.6-7.3 --- Low Low Low 0.10 5 2 Vona 6-28; 2.0-6.0 0.12-0. 14 6.6-8.4 <4 Low High Low 0. 10 28-601 6.0-20 0.08-0.11 7.4-8.4 <4 ,Low High Low 0. 10 75, 76, 77 0-6 12.0-6.0 0.11-0.13 6.6-7.3 --- Low Low Low 0. 10 5 3 Vona 6-28; 2.0-6.0 0.12-0. 14 6.6-8.4 <4 Low High Low 0. 10 28-60; 6.0-20 0.08-0. 11 7.4-8.4 <4 Low High Low 0.10 78, 79, 80 0-8 1 0.6-2.0 0.16-0.21 6.6-7.3 <2 Low Low Low 0.32 5 6 Weld 8-1510.06-0.2 0.19-0.21 6.6-7.8 <2 High Moderate Low 0.28 15-60; 0.6-2.0 0.16-0.21 7.4-8.4 <2 Low High Low 0.28 81*, 82*, 83*: Wiley 0-111 0.6-2.0 ,0. 19-0.21 ; 7.4-7.8 <2 Wow High Low 0.37 5 4L 11-60 0.6-2.0 ;0.19-0.21 ; 7.9-8.4 <2 ;Moderate High Low 0.37 Colby 0-7 ; 0.6-2.0 1'0.20-0.241 6.6-8.4 <2 ;Low Moderate Low 0.37 5 4L --- - 7-60 0.6-2.0 '0. 17-0.22; 7.4-8.4 <2 ;Low Moderate Low 0.37 * See map unit description for the composition and behavior of the map unit. WELD COUNTY, COLORADO, SOUTHERN PART 133 ' TABLE 14.--SOIL AND WATER FEATURES--Continued Flooding High water table Bedrock oil name and Hydro- Potential map symbol logic Frequency ; Duration Months 1 Depth ; Kind ;Months Depth Hard- frost group ness action Ft In Shingle D None --- --- >6.0 --- --- 10-20 Rip- Low. pable 37, 38n 38 B None -__ --- >6.0 --- --- 20-40;Rip- 'Low. noble 39, 40, 41 , 42, 43 C None --- --- >6.0 --- >60 --- Moderate.Nunn 44, 45, 46, 47, 48 B None ___ --- >6.0 ___ ___ >60 --- Low. Olney 49 A None --- --- >6.0 --- --- >60 --- Low. Osgood 50, 51 , 52, 53---- B None --- --- >6.0 --- --- >60 --- Low. Otero 54, 55 8 None to rare --- --- >6.0 --- --- >60 --- Moderate. Paoli 56, 57 C None --- --- >6.0 20-40 Rip- Low. Renohill --- --- pable 58, 59 D None --- --- >6.0 --- 10-20 Rip- Low. Shingle --- pable, : ngle D None --- --- >6.0 '10-20 Rip- Low. pable Renohill C None --- --- >6.0 ',20-40 Rip- Low. pable 61 D None --- >6.0 --- -- 10-20 Tassel "- - Rip- Low. noble 62,63 B None --- --- >6.0 -__ --- 20-40 Rip- ILow. Terry gable 64, 65 C None --- >6.0 -- Thedalund --- --- 20-40 Ri P- Low. , noble 66, 67 C None --- --- >6.0 --- --- >60 --- Low. Ulm 68' I' A None ___ --- >6.0 --- >60 --- Low. Ustic Torriorthents 69, 70 A None --- >6.0 --- --- >60 --- Low. Valent 71': Valent A None --- --- Low. Loup D Rare to Brief Mar-Jun +.5-1.5 Apparent.Nov-Mav >60 --- Moderate. F i common. 72, 73, 74, 75, 76, 77 B None --- --- >6.0 --- >60 --- Low. Vona See footnote at end of table. Hello