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Home My WebLink About20070800.tiff WELD COUNTY SOILS REPORT E2E2SW4 Section 7-T3N-R66W i �.ry. �. R I t. 4 Y d i U f a a :. yShR+�' 'LT ,+ , ri 2 h j 4T p T R F. ,, . • . R '-,r,-• t f I '_ ice. s ��, ? '� i F i ' ! 1 1 / b S ;:Hrrr A % .5 1 i ;tea r 1 Maxi ,� (11:C-,Ii;:;:)-,,;'5.:;„;,g�,�. h , :y { E l .]r..jay Legend . . I. Weld County Soils .•4d ' r. . - t• 1ilks ', Map Unit Symbol a� 1 1 t' � 1A, I�., .p[- rA+w t z ' l cif §'. 70 .....4., --k.', - 4 Vy , ' ,n �.'. L_ _J 72 76 N ---- Highways ---- Weld County Roads 0 225 450 900 1,350 1,8�eet Section Boundaries 2007-0800 M.Lk48+a,N Non Technical Soil Description(s) (NASIS derived) Soil Survey Area C0618 Weld County, Colorado, Southern Part Mapunit 1 ALTVAN LOAM, 0 TO 1 PERCENT SLOPES Soil Component Name ALTVAN 90%of the mapunit Slope range(%): 0 to 1 Depth class: Very deep Drainage class: Well drained Permeability: Moderate Available water capacity class: Low Average total available water in top five feet(in.): 5.7 Land capability subclass,non-irrigated: 4e Land capability subclass,irrigated: 3s Ecological Site: LOAMY PLAINS Runoff class: Low Depth to seasonal high water table: NA- Flooding frequency: None Other restrictions(in): NA - Horizon Information Depth(in) Textures pH range Sodium Salinity(mmhos/cm) HI 0 - 10 6.6 - 7.8 NA - NA- L loam H2 10 - 25 6.6 - 7.8 NA - NA- SCL sandy clay loam CL clay loam H3 25 - 60 7.4 - 8.4 NA - NA- GR-COS gravelly coarse sand GR-S gravelly sand pH classes:3.5-4.4 extremely acid;4.5-5.0 very strongly acid;5.1-5.5 strongly acid;5.6-6.0 moderately acid; 6.1-6.5 slightly acid;6.6-7.3 neutral;7.4-7.8 slightly alkaline;7.9-8.4 moderately alkaline; 8.5-9.0 strongly alkaline; >9.0 very strongly alkaline. Salinity classes(if applicable): 0-2 non saline;2-4 very slightly saline;4-8 slightly saline; 8-16 moderately saline; >=16 saline. Thursday,April 27,2006 Non Technical Soil Description(NASIS derived) Page I of 6 Mapunit 21 DACONO CLAY LOAM, 0 TO 1 PERCENT SLOPES Soil Component Name DACONO 85%of the mapunit Slope range(%): 0 to I Depth class: Very deep Drainage class: Well drained Permeability: Moderately slow Available water capacity class: Moderate Average total available water in top five feet(in.): 6.3 Land capability subclass,non-irrigated: 3s Land capability subclass,irrigated: 2s Ecological Site: CLAYEY PLAINS Runoff class: Medium Depth to seasonal high water table: NA- Flooding frequency: None Other restrictions(in): NA - Horizon Information Depth(in) Textures pH range Sodium Salinity(mmhos/cm) Hl 0 - 12 6.6 - 7.8 NA - NA- CL clay loam H2 12 - 21 7.4 - 8.4 NA - NA- CL clay loam C clay GR-CL gravelly clay loam H3 21 - 27 7.4 - 8.4 NA - NA- CL clay loam L loam SIL silt loam H4 27 - 60 7.4 - 8.4 NA - NA- GRX-S extremely gravelly sand GRV-S very gravelly sand pH classes:3.5-4.4 extremely acid;4.5-5.0 very strongly acid;5.1-5.5 strongly acid;5.6-6.0 moderately acid; 6.1-6.5 slightly acid;6.6-7.3 neutral;7.4-7.8 slightly alkaline;7.9-8.4 moderately alkaline; 8.5-9.0 strongly alkaline; >9.0 very strongly alkaline. Salinity classes(if applicable): 0-2 non saline;2-4 very slightly saline;4-8 slightly saline;8-16 moderately saline; >=16 saline. aWm9,111RIRMAWASMInefaittitIMIIIMMEumnmm l,Wamwnwamiumemawmmxu ...... .. . . ms Thursday,April 27,2006 Non Technical Soil Description(NASIS derived) Page 2 of 6 • Mapunit 72 VONA LOAMY SAND, 0 TO 3 PERCENT SLOPES Soil Component Name VONA 85%of the mapunit Slope range(%): 0 to 3 Depth class: Very deep Drainage class: Well drained Permeability: Moderately rapid Available water capacity class: Moderate Average total available water in top five feet(in.): 6.5 Land capability subclass,non-irrigated: 4e Land capability subclass,irrigated: 3e Ecological Site: SANDY PLAINS Runoff class: Very low Depth to seasonal high water table: NA- Flooding frequency: None Other restrictions(in): NA Horizon Information Depth(in) Textures pH range Sodium Salinity(mmhos/cm) HI 0 - 6 6.6 - 7.8 NA - NA- LS loamy sand H2 6 - 28 6.6 - 8.4 NA - NA- FSL fine sandy loam SL sandy loam H3 28 - 60 7.9 - 9 NA - NA- SL sandy loam LS loamy sand LFS loamy fine sand _..._..... . pH classes:3.5-4.4 extremely acid;4.5-5.0 very strongly acid;5.1-5.5 strongly acid;5.6-6.0 moderately acid; 6.1-6.5 slightly acid;6.6-7.3 neutral;7.4-7.8 slightly alkaline;7.9-8.4 moderately alkaline;8.5-9.0 strongly alkaline; >9.0 very strongly alkaline. Salinity classes(if applicable):0-2 non saline;2-4 very slightly saline;4-8 slightly saline; 8-16 moderately saline; >=16 saline. Thursday,April 27,2006 Non Technical Soil Description(NASIS derived) Page 5 of 6 • 9 I 4177�E8 ? 2 4 \ 35 V l ) l v A i PLATTE 3 I I i0 \ I r 1 �l / F .ae t / 35 69 3 39 72 • • \---± 2 � s / as 10 ''t 68 _ 7 //. 70,��_� I II o � eQ ID 3 W o 58 ]3 j \-°4 ]6 i a 45 i4 �30 10 I 70 20 d 45 22 68I I 3 � as I 44 95 (: I 27 n9 ]C \ V y 3 ' 68 10 I \ , ' .io -,/ ee k Platteville to N---.'-----_,-._1,-- v � � ��✓ a] 3 1y , i 20 V‘ 69 60 a7 �� 1� /f \ j i 56. �- g r� A 5 �� k68 sI - li / L\ / \-__----\,,,, /r� 41 �! / ��. 7 ' / 3 i I � 774 -4 e0 1 ,c---8-/ / r 69 / 39 6] o(/25 'i, 30./ J4 29 ii 5 � 57 WELD COUNTY, COLORADO, SOUTHERN PART 7 --4rief description of the soil profile. In each description, The acreage and proportionate extent of each map unit .e principal hazards and limitations are indicated, and are given in table 4, and additional information on proper- the management concerns and practices needed are ties, limitations, capabilities, and potentials for many soil discussed. uses is given for each kind of soil in other tables in this The map units on the detailed soil maps represent an survey. (See "Summary of tables.") Many of the terms area on the landscape made up mostly of the soil or soils used in describing soils are defined in the Glossary. for which the unit is named. Most of the delineations shown on the detailed soil map are phases of soil series. Soil descriptions Soils that have a profile that is almost alike make up a soil series. Except for allowable differences in texture of 1—Altvan loam, 0 to 1 percent slopes. This is a deep, the surface layer or of the underlying substratum, all the well drained soil on terraces at elevations of 4,500 to 4,900 soils of a series have major horizons that are similar in feet. It formed in old alluvium deposited by the major composition, thickness, and arrangement in the profile. A rivers. Included in mapping are small areas of soils that soil series commonly is named for a town or geographic show evidence of poor drainage. Also included are small, feature near the place where a soil of that series was long and narrow areas of sand and gravel deposits. first observed and mapped. Olney and Nunn, for example, Typically the surface layer of the Altvan soil is grayish are names of two soil series. brown loam about 10 inches thick. The subsoil is brown Soils of one series can differ in texture of the surface and light yellowish brown clay loam and sandy clay loam layer or in the underlying substratum and in slope, ero- about 15 inches thick. The substratum is calcareous loamy sion, stoniness, salinity, wetness, or other characteristics sand about 6 inches thick over gravelly sand. that affect their use. On the basis of such differences, a Permeability and available water capacity are soil series is divided into phases. The name of a soil phase moderate. The effective rooting depth is 20 to 40 inches. commonly indicates a feature that affects use or manage- Surface runoff is slow, and the erosion ha7--ard is low. rnent. For example, Olney fine sandy loam, 1 to 3 percent This soil is used almost entirely for irrigated crops. It slopes, is one of several phases within the Olney series. Some map units are made up of two or more dominant is suited to all crops commonly grown in the area, includ- ing corn, sugar beets, beans, alfalfa, small grain, potatoes, kinds of soil. Such map units are called soil complexes and and onions. An example of a suitable cropping system is 3 undifferentiated groups. soil complex consists of areas of two or more soils to 4 years of alfalfa followed by corn, corn for silage, are so intricately mixed or so small in size that they sugar beets, small grain, or beans. The high clay content cannot be shown separately on the soil map. Each area in- and the rapidly permeable substratum slightly restrict eludes some of each of the two or more dominant soils, some crops. All methods of irrigation are suitable, but furrow ir- and the pattern and proportion are somewhat similar in ail areas. Midway-Shingle complex, 5 to 20 percent slopes, rigation is the most common (fig. 4). Proper irrigation is an example. water management is essential. Barnyard manure and An undifferentiated grout/ is made up of two or more commercial fertilizer are needed for top yields. soils that could be mapped individually but are mapped as Windbreaks and environmental plantings of trees and one unit because there is little value in separating them. shrubs commonly grown in the area are generally well The pattern and proportion of the soils are not uniform. suited to this soil Cultivation to control competing An area shown on the map has at least one of the domi- vegetation should be continued for as many years as Want (named) soils or may have all of them. Loup-Boel possible following planting. Trees that are best suited and loamy sands, 0 to 3 percent slopes, is an undifferentiated have good survival are Rocky Mountain juniper, eastern redcedar, ponderosa pine, Siberian elm, Russian-olive, and group in this survey area. Most map units include small, scattered areas of soils hackberry. The shrubs best suited are skunkbush sumac, other than those that appear in the name of the map unit. lilac, Siberian peashrub, and American plum. Some of these soils have properties that differ substan- This soil can produce habitat elements that are highly tially from those of the dominant soil or soils and thus suitable for openland wildlife, including pheasant, cotton- could significantly affect use and management of the map tail, and mourning dove. Such crops as wheat, corn, and unit. These soils are described in the description of each alfalfa provide suitable habitat for openland wildlife, map unit. Some of the more unusual or strongly contrast- especially pheasant. Tree and shrub plantings and ing soils that are included are identified by a special sym- undisturbed nesting cover would enhance openland wil- ool on the soil map. dlife populations. Most mapped areas include places that have little or no This Altvan soil has fair to good potential for urban soil material and support little or no vegetation. Such and recreational development. The chief limiting soil fea- places are called miscellaneous areas; they are delineated tures for urban development are the shrink-swell paten- on the soil map and given descriptive names. Rock out- tin! of the subsoil as it wets and dries and the rapid cr a.is an example. Some of these areas are too small to permeability of the sand and gravel substratum. Septic b :iireated and are identified by a special symbol on tank absorption fields function properly, but in places the the soil map. substratum does not contain enough fines to properly S SOIL SURVEY filter the leachate. Sewage lagoons require sealing. 60 percent of the unit. Aquents, which have a lighter Lawns, shrubs, and trees grow well. Capability subclass colored surface layer, make up about 35 percent. About 5 IIs irrigated. percent is Aquepts and Bankard sandy loam. 2—Altvan loam, 1 to 3 percent slopes. This is a deep, These are deep, poorly drained soils that formed in well drained soil on terraces at elevations of 4,500 to 4,900 recent alluvium. No one pedon is typical. Commonly the feet. It formed in old alluvium deposited by the major soils have a mottled, mildly alkaline to moderately al- rivers. Included in mapping are small areas of soils that kaline loamy or clayey surface layer and underlying show evidence of poor drainage. Also included are small, material and are underlain by sand or sand and gravel long and narrow areas of sand and gravel deposits. within 48 inches. In places they have a gleyed layer in the Typically the surface layer of this Altvan soil is grayish underlying material. brown loam about 10 inches thick. The subsoil is brown Most of the acreage is subject to flooding. The water and light yellowish brown clay loam and sandy clay loam table is at or near the surface early in spring and recedes about 14 inches thick. The substratum is calcareous loamy to as deep as 48 inches late in fall in some years. sand about 5 inches thick over gravelly sand. These soils are used for rangeland and wildlife habitat. Permeability and available water capacity are Some small areas have been reclaimed by major drainage moderate. The effective rooting depth is 20 to 40 inches. and leveling and are used for irrigated crops. Surface runoff is medium, and the erosion hazard is low. The potential native vegetation is dominated by alkali This soil is used almost entirely for irrigated crops. It sacaton, switchgrass, and western wheatgrass. Saltgrass, is suited to all crops commonly grown in the area, inciud- sedge, rush, and alkali bluegrass are also ing corn, sugar beets, beans, alfalfa, small grain, potatoes, prominent. Potential production ranges from 3,000 pounds per acre in and onions. An example of a suitable cropping system is 3 favorable to 4 years of alfalfa followed by corn, corn for silage, years to 2,000 pounds in unfavorable years. As sugar beets, small grain, or beans. Land leveling, ditch range condition deteriorates, the switchgrass, alkali lining, and installing pipelines may be needed for proper sedge, a and western wheatgrass decrease and saltgrass, water application. sedge, and rush increase. All methods of irrigation are suitable, but furrow ir- Management of vegetation should be based on takinghalf and leaving half of the total annual production. Seed- rigztiga is the most common. Barnyard manure and corn- ing is difficult and costly because numerous tillage prac- mercizl fertilizer are needed for top yields. does are required to eliminate the saitgrass sod. Windbreaks and environmental plantins of trees and shrubs commonly grown in the area are generally- well Swrziehgrass, western wheatgrass, alkali sacaton, tall wheatgrass, and tall fescue are suitable for seeding. They suited to this soil. Cultivation to control competing vegetation should be continued for as many years as can be seeded into a clean, firm seedbed. Seedbed possible following planting. Trees that are best suited and preparation usually requires more than i year tc have good survival are Rocky Mountain juniper, eastern eliminate toe saitg_-ass sod. A grass drib should be used. redcedar; ponderosa pine, Siberian elm, Russian-olive, and Seeding early in spring has proven most successful. haclben-3 The shrubs best suited are skunk:bash sumac, Wetland wildlife, especially waterfowl, utilize this unit. lilac, Siberian peashrub, and American plum. The wetland plants provide nesting and protective cover. This soil can produce habitat elements that are highly as well as some food. The nearby irrigated cropland, suitable for openland wildlife including pheasant, cotton- where wildlife obtain much of their food and find protec- tail, and mourning dove. Such crops as wheat, corn, and tive cover, makes this unit valuable to both wetland and alfalfa provide suitable habitat for openland wildlife, openland wildlife. especially pheasant. Tree and shrub plantings and Openland wildlife, especially pheasant, use this unit for undisturbed nesting cover would enhance openland w-ii- cover and nesting. Deer find excellent cover in some dlife populations. areas. This Altvan soil has fair to good potential for urban These valuable wildlife areas should be protected from and recreational development. The chief limiting soil fea- fire and fenced to prevent enc_-aachmcr, and a'erase b tures for urban development are the shrink-swell poten- livestock. They should not be drained. tial of the subsoil as it wets and dries and the rapid These soils have good potential as a source of sand and nermeability of the sand and gravel substratum. Septic gravel. Capability subclass Viw; Salt Meadow range site. tank: absorption. fields :unction properly, but In places the 4—'euol'ls and Aquepts, flooded. This nearkv level sube.,,Mm does not contain _enough fines to Properly map unit is in ,enressions in smooth plains and along the filter the leachate. Sewage lagoons re e sealin_ bottoms of natural dr ,r,ag ewaysthroughout the survey a . and trees grow Tel. v nabi..ty subclass. area AgLO Is, which have a dark colored surface layer, � � Ai N a ) 55 percent. _ n t n3. Lt—Acup Aquents. gravelly substratum. This have a lightercolored r° a layer, make b 25 nearly _ ar unit is on bottom lands and flood plains percent. About percent is soils that are drainer'. of all 'me rr..ajor streams in the survey area kouohls, and soils - a - cci: .,lo__d r` a, " _ "` _ _ _ Q L. _ Hello