HomeMy WebLinkAbout20050909.tiff SOILS REPORT
A portion of the Southeast Quarter of Section 30,
Township 1 North, Range 66 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
2005-0909
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WELD COUNTY, COLORADO, SOUTHERN PART NO. 30
4
WELD COUNTY, COLORADO, SOUTHERN PART 7
)fief description of the soil profile. In each description, The acreage and proportionate extent of each map unit
principal hazards and limitations are indicated, and are given in table 4, and additional information on proper-
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 hazard is low.
ment. 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. is suited to all crops commonly grown in the area, includ-
Some map units are made up of two or more dominant 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. to 4 years of alfalfa followed by corn, corn for silage,
A soil complex consists of areas of two or more soils sugar beets, small grain, or beans. The high clay content
tt are so intricately mixed or so small in size that they and the rapidly permeable substratum slightly restrict
....nnot be shown separately on the soil map. Each area in-
cludes 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
all areas. Midway-Shingle complex, 5 to 20 percent slopes, water n is the most common (fig. 4). Proper irrigation
is an example. water management is essential. Barnyard manure and
An undifferentiated group 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
group in this survey area. redcedar, ponderosa pine, Siberian elm, Russian-olive, and
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-
bol 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 poten-
on the soil map and given descriptive names. Rock out- tial of the subsoil as it wets and dries and the rapid
jrop is an example. Some of these areas are too small to permeability of the sand and gravel substratum. Septic
delineated and are identified by a special symbol on tank absorption fields function properly, but in places the
.,ie soil map. substratum does not contain enough fines to properly
8 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
Its 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, includ- sedge, rush, and alkali bluegrass are also prominent.
ing corn, sugar beets, beans, alfalfa, small grain, potatoes, Potential production ranges from 3,000 pounds per acre in
and onions. An example of a suitable cropping system is 3 favorable years to 2,000 pounds in unfavorable years. As
to 4 years of alfalfa followed by corn, corn for silage, range condition deteriorates, the switchgrass, alkali
sugar lining, beets, small grain, or beans. Land leveling, ditch sacaton, and western wheatgrass decrease and saltgrass,
g, and installing pipelines may be needed for proper sedge, and rush increase.
water application Management of vegetation should be based on taking
All methods of irrigation are suitable, but furrow ir- half and leaving half of the total annual production. Seed-
rigation is the most common. Barnyard manure and com-
ing is difficult and costly because numerous tillage prac-
mercial fertilizer are needed for top yields.
Windbreaks and environmental plantins of trees and tices are required to eliminate the saltgrass sod.
shrubs commonly grown in the area are generally well Switchgrass, 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 1 year to
have good survival are Rocky Mountain juniper, eastern eliminate the saltgrass sod. A grass drill should be used.
redcedar, ponderosa pine, Siberian elm, Russian-olive, and Seeding early in spring has proven most successful.
Wetland wildlife, especially waterfowl, utilize this unit.hackberry. The shrubs best suited are skunkbush sumac,
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 wil- cover and nesting. Deer fmd 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 encroachment and overuse by
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
permeability of the sand and gravel substratum. Septic gravel Capability subclass VIw; Salt Meadow range site.
tank absorption fields function properly, but in places the 4—Aquolls and Aquepts, flooded. This nearly level
substratum does not contain enough fines to properly map unit is in depressions in smooth plains and along the
filter the leachate. Sewage lagoons require sealing. bottoms of natural drainageways throughout the survey
Lawns, shrubs, and trees grow well. Capability subclass area. Aquolls, which have a dark colored surface layer,
IIe irrigated. make up about 55 percent of the unit. Aquepts, which
3—Aquolls and Aquents, gravelly substratum. This have a lighter colored surface layer, make up about 25
nearly level map unit is on bottom lands and flood plains percent. About 20 percent is soils that are well drained
of all the major streams in the survey area. Aquolls, and soils that have sandstone or shale within 48 inches of
which have a dark colored surface layer, make up about the surface.
96 SOIL SURVEY
TABLE 5.--YIELDS PER ACRE OF IRRIGATED CROPS
[All yields were estimated for a high level of management in 1975. Absence of a yield figure indicates the
crop is seldom grown or is not suited]
Soil name and Beans,
map symbol Alfalfa hay:Sugar beets Corn Corn silage dry pinto Onions Potatoes
Ton Ton Bu Ton Lb -r Sack --r Cwt
1, 2 5.0 23 160 33 2400 525 325
Altvan
3 --- --- --- --- --- --- ---
Aquolls
4 ___ _-_ ___ -_- ___ ___ ___
Aquolls
5 _-_ ___ ___ ___ ___ ___ ___
Ascalon
6 --- --- --- _-- --- --- ---
Ascalon
7 ___ _-_ ___ ___ ___ ___ ___
Ascalon
8 5.5 24 180 35 2700 550 350
Ascalon
9 5.5 23 160 33 2400 525 325
Ascalon
10 2.5 i ___ 50 ___ ___ ___ ___
Bankard .
11 5.5 24 180 35 2700 550 350
Bresser
12 5.5 23 160 33 2400 525 325
Bresser
Cascajo
14 5.5 24 180 35 2700 --- ---
Colby
15 5.5 i 23 160 33 2400 --- ---
Colby
16 4.0 18 100 23 1800 --- ---
Colby
17 3.0 --- 80 20 --- --- ---
Colby
18 --- --- -- --- --- --- ---
Colby
19• 5.5 24 170 35 2700 550 350
Colombo
20' 5.5 23 160 33 2400 525 325
Colombo
21 5.5 26 170 33 2400 525 325
Dacono
22 5.5 25 150 30 2400 525 325
Dacono
23 5.5 24 180 35 2700 550 ---
Fort Collins
See footnote at end of table.
100 SOIL SURVEY
TABLE 6.--BUILDING SITE DEVELOPMENT
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," and "severe." Absence of an entry means soil was not
rated)
Soil name and Shallow Dwellings Dwellings Small Local roads
map symbol excavations without with commercial and streets
basements basements buildings
1 , 2 Severe: Moderate: Moderate: Moderate: Moderate:
Altvan cutbanks cave. shrink-swell. shrink-swell. shrink-swell. shrink-swell,
frost action.
3':
Aquolls Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
Aquents Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
4':
Aqdolls Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
Aquepts Severe: Severe: Severe: Severe: Severe:
floods, floods, floods, floods, floods,
wetness. wetness. wetness. wetness. wetness,
frost action.
5 Slight Moderate: Moderate: Moderate: Moderate:
Ascalon low strength. low strength. low strength, frost action,
low strength.
6, 7 Slight Moderate: Moderate: Moderate: Moderate:
Ascalon low strength. low strength. slope, frost action,
low strength. low strength.
8, 9 Slight Moderate: Moderate: Moderate: Moderate:
Ascalon low strength. low strength. low strength. frost action,
low strength.
10 Severe: Severe: Severe: Severe: Severe:
Bankard cutbanks cave, floods. floods. floods. floods.
floods.
11 , 12 Slight Slight Slight Slight Moderate:
Bresser frost action.
13 Severe: Moderate: Moderate: Severe: Moderate:
Cascajo cutbanks cave, slope. slope, slope, slope.
small stones.
14, 15 Slight Slight Slight Slight Moderate:
Colby low strength.
16, 17 Slight Slight Slight Moderate: Moderate:
Colby slope. low strength.
18':
Colby Slight Slight Slight Moderate: Moderate:
slope. low strength.
Adena Slight Moderate: Moderate: Moderate: Moderate:
low strength. low strength. low strength, low strength.
slope.
See footnote at end of table.
104 SOIL SURVEY
TABLE 7.--SANITARY FACILITIES
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," "good," "fair," and other terms used to rate soils.
Absence of an entry means soil was not rated)
Soil name and Septic tank Sewage lagoon Trench Area Daily cover
map symbol absorption areas sanitary sanitary for landfill
fields landfill landfill
1 , 2 Slight Severe: Severe: Slight Fair:
Altvan seepage. seepage. thin layer.
3*:
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
Aquents Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
4':
Aquolls Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
Aquepts Severe: Severe: Severe: Severe: Poor:
floods, floods, floods, wetness. wetness.
wetness. wetness. wetness.
5, 6 Slight Severe: Severe: Severe: Good.
Ascalon seepage. seepage. seepage.
7 Slight Severe: Severe: Severe: Good.
Ascalon slope, seepage. seepage.
p...-.., seepage.
8, 9 Slight Severe: Severe: Severe: Good.
Ascalon seepage. seepage. seepage.
10 Severe: Severe: Severe: Severe: Fair:
Bankard floods. floods, floods, floods. too sandy.
seepage. seepage.
11, 12 Slight Severe: Severe: Severe: Good.
Bresser seepage. seepage. seepage.
13 Moderate: Severe: Severe: Severe: Poor:
Cascajo slope. slope, seepage. seepage. small stones.
seepage,
small stones.
14, 15, 16 Slight ;Moderate: Slight Slight Good.
Colby ; seepage.
17 Slight ;Severe: Slight Slight Good.
Colby ; slope.
18':
Colby Slight ;Severe: Slight Slight Good.
I slope.
Adena Moderate: :Moderate: Slight Slight Good.
percs slowly. I seepage,
I slope.
19 Moderate: :Severe: Moderate: Moderate: Good.
Colombo floods. i floods. floods. floods.
•
20 Slight Moderate: :Slight Slight Good.
Colombo slope,
seepage.
See footnote at end of table.
108 SOIL SURVEY
TABLE 8.--CONSTRUCTION MATERIALS
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "good," "fair," "poor," and "unsuited." Absence of an entry means soil was not
rated]
Soil name and Roadfill Sand Gravel Topsoil
map symbol
1 , 2 Good Fair: :Fair: Fair:
Altvan excess fines. i excess fines. thin layer.
3•:
Aquolls Poor: Good ;Fair: Poor:
wetness, ; excess fines. wetness.
frost action.
Aquents Poor: Good ;Fair: Poor:
wetness, ; excess fines. wetness.
frost action.
4*:
Aquolls Poor: Unsuited ;Unsuited Poor:
wetness, wetness.
frost action.
Aquepts Poor: Unsuited Unsuited Poor:
wetness, wetness.
frost action.
5, 6, 7, 8, 9 Fair: Poor: Unsuited ;Good.
Ascalon low strength, excess fines.
frost action,
shrink-swell.
10 Fair: Fair: Unsuited ;Poor:
Bankard low strength. excess fines. I too sandy.
11, 12 Fair: Poor: Unsuited ;Fair:
Bresser frost action. excess fines. ; small stones.
13 Good Good Good ;Poor:
Cascajo I small stones.
14, 15, 16, 17 Fair: Unsuited Unsuited ;Good.
Colby low strength.
18•:
Colby Fair: Unsuited Unsuited :Good.
low strength.
Adena Fair: Unsuited Unsuited ;Fair:
low strength. i too clayey.
19, 20 Fair: Unsuited Unsuited ;Fair:
Colombo low strength, I too clayey.
frost action.
21 , 22 Good Good Good Fair:
Dacono too clayey.
23, 24 Fair: Unsuited Unsuited Good.
Fort Collins low strength.
25, 26 Fair: Unsuited Unsuited Good.
Haverson low strength.
27, 28 Poor: Unsuited Unsuited ;Poor:
Heldt shrink-swell, ; too clayey.
low strength.
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 111
TABLE 9.--WATER MANAGEMENT
(S of the terms used in this table to describe restrictive soil features are defined in the Glossary. Absence
of an entry means soil was not evaluated]
Soil name and Pond Embankments, Drainage Irrigation Terraces Grassed
map symbol reservoir dikes, and and waterways
areas levees diversions
1 , 2 Seepage Thin layer Favorable Favorable Rooting depth Rooting depth.
Altvan
3*:
Aquolls Floods, Floods, Wetness Wetness.
poor outlets. wetness.
Aquents Floods, Floods, Wetness Wetness.
poor outlets. wetness.
4*:
Aquolls Floods, Floods, Wetness Wetness.
poor outlets. wetness.
Aquepts Floods, Floods, Wetness Wetness.
poor outlets. wetness.
5 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily.
Ascalon slope. low strength. erodes easily. piping.
6 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily,
Ascalon slope. low strength. erodes easily. piping. slope.
7 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily,
Ascalon slope. low strength. erodes easily. piping, slope.
slope.
8- Seepage, Piping, Favorable Favorable Erodes easily, Erodes easily.
As_aion slope. low strength. piping.
9 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily.
Ascalon slope. low strength. erodes easily. piping.
10 Seepage Piping, Cutbanks cave, Droughty, Erodes easily, Droughty,
Bankard seepage, floods, floods, piping. erodes easily.
erodes easily. poor outlets. seepage.
11 Seepage Favorable Favorable Droughty Erodes easily, Erodes easily.
Bresser
piping.
12 Seepage, Favorable Slope Slope, Erodes easily, Erodes easily.
Bresser slope. erodes easily. piping.
13 Seepage, Seepage Slope Slope, Complex slope, Droughty,
Cascajo slope. droughty. piping, slope.
too sandy.
14 Seepage Low strength, Favorable Favorable Favorable Favorable.
Colby piping.
15 Seepage Low strength, Favorable Favorable Favorable Slope,
Colby piping. erodes easily.
16, 17 :Seepage Low strength, Slope Slope, Favorable Slope,
Colby piping. erodes easily. erodes easily.
18;: :
Colby :Seepage Low strength, Slope Slope, Favorable Slope,
piping. erodes easily. erodes easily.
Adena :Slope, Low strength, Slope, Slope, Slope, Slope,
: seepage. piping. percs slowly. peres slowly. piping. peres slowly.
19"" :Seepage Low strength, Floods Favorable Erodes easily Erodes easily.
C ibo compressible.
See footnote at end of table.
116 SOIL SURVEY
TABLE 10.--RECREATIONAL DEVELOPMENT
[Some of the terms used in this table to describe restrictive soil features are defined in the Glossary. See
text for definitions of "slight," "moderate," and "severe." Absence of an entry means soil was not
rated]
Soil name and Camp areas Picnic areas Playgrounds Paths and trails
map symbol
1 Slight Slight Slight Slight.
Altvan
2 Slight Slight Moderate: Slight.
Altvan slope.
3':
Aquolls Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
Aquents Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
4':
Aquolls Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
Aquepts Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
5, 6 Slight Slight Moderate: Slight.
Ascalon slope.
7 Slight Slight Severe: Slight.
Ascalon slope.
8 Slight Slight Slight Slight.
Ascalon
9 Slight Slight Moderate: Slight.
Ascalon slope.
10 Severe: Moderate: Severe: Slight.
Bankard floods. floods, floods.
too sandy.
11 Slight Slight Slight Slight.
Br esser
12 Slight Slight Moderate: Slight.
Bresser slope.
13 Moderate: Moderate: Severe: Moderate:
Cascajo slope, slope, slope, small stones.
small stones. small stones. small stones.
14 Moderate: Moderate: Moderate: Moderate:
Colby dusty. dusty. dusty. dusty.
15, 16 Moderate: Moderate: Moderate: Moderate:
Colby dusty. dusty. slope, dusty.
dusty.
17 Moderate: Moderate: Severe: Moderate:
Colby dusty. dusty. slope. dusty.
18':
Colby Moderate: Moderate: Severe: Moderate:
dusty. dusty. slope. dusty.
r
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 121
TABLE 11.--WILDLIFE HABITAT POTENTIALS
[ text for definitions of "good," "fair," "poor," and "very poor." Absence of an entry indicates the soil
was not rated]
Potential for habitat elements Potential as habitat for--
Soil name and ' Wild
map symbol Grain Grasses i herba- Shrubs Wetland
Shallow hallr wildlife
Openland
l wildlife wildlife
Wd
and seed and ceous plants areas ___.____
crops** legumes plants __—T__---r- ——
1 2 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Altvan
34: Poor Poor Good Fair Good Good Fair Good Fair.
Aquolls
Aquents
Poor Poor Good Fair Good Good Fair Good Fair.
4*
Aquolls Poor Poor ;Good Poor Good Good ,Fair Good Fair.
Aquepts Poor Poor ;Good Poor Good Good ;Fair ,Good Fair.
i
5, 6 Good Good Fair Fair Poor Very poor;Good :Very poor Fair.
Ascalon
7 Fair Good Fair Fair Poor Very poor Fair ;Very poor Fair.
Ascalon
8, 9 Good Good Fair Fair Poor Very poor Good ;Very poor Fair.
Ascalon
10 Poor Fair Fair Fair Poor Very poor Fair Very poor Fair.
Bankard
---- 12 Good Good Fair Fair Poor Very poor Good Very poor Fair.
esser ,
13 Very poor Very poor Fair Fair Very poor Very poor Poor Very poor Fair.
Cascajo
14, 15 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Colby
16, 17 Fair Good Fair Fair Poor Very poor Fair Very poor Fair.
Colby
18*:
Colby Fair Good Fair Fair Poor Very poor Fair Very poor Fair.
Adana Fair Good Fair Fair Poor Very poor Fair Very poor Fair.
19, 20 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Colombo
21 , 22
Good Good Fair Fair Poor Very poor Good Very poor Fair.
Dacono
�3 24 Good Good Fair Fair Poor Very poor GoodVery poor Fair.
Fort Collins
25, 26
Good Good Fair Fair Poor Very poor Good Very poor Fair.
Haverson
27 Fair Fair Poor Poor Poor Poor Fair Poor Poor.
Heldt
28 Fair Fair Poor Poor Poor Very poor Fair Very poor Poor.
Heldt
29 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Julesburg
0 Good Good Fair Fair Poor Very poor Good Very poor Fair.
Julesburg
See footnotes at end of table.
124 SOIL SURVEY
TABLE 12.--ENGINEERING PROPERTIES AND CLASSIFICATIONS
[The symbol < means less than; > means greater than. Absence of an entry means data were not estimated]
Classification Frag- ; Percentage passing
Soil name and Depth USDA texture ments ; sieve number-- Liquid Plas-
map symbol Unified AASHTO > 3 I i limit ticity
In inches; 4 10 40 200 index
Pct Pct
1, 2 0-10 Loam CL-ML A-4 0 90-100 85-10060-95 50-75 20-30 5-10
Altvan 10-25 Clay loam, loam CL A-6, A-7 0 95-100 95-100 85-100 70-80 35-50 15-25
25-50 Sand and gravel SP, SP-SM A-1 0 75-95 70-90 25-35 0-10 --- NP
3*:
Aquolls 0-48 Variable _ --- _-- --- _ _
48-60 Sand, gravelly SP, SP-SM A-1 , 0-10 60-90 50-70 30-50 0-10 NP
sand.
I
Aquents 0-48 Variable --- -__ ___ _ _
48-60 Sand and gravel SP, SP-SM A-1 0-10 60-90 50-70 30-50 0-10 --- NP
4*:
Aquolls 0-60 Variable ___ ---
--- ___ ___ ___ ___ ---
Aquepts 0-60 Variable _-_ --- --- ---
5, 6, 7 0-8 Sandy loam SM A-2, A-4 0 95-100 90-100 70-95 25-50 15-25 NP-5
Ascalon 8-18 Sandy clay loam SC, CL A-6 0 95-100 90-100 80-100 40-55 20-40 10-20
18-60 Sandy loam, SC, A-4, A-6 0 95-100 95-100 75-95 35-65 20-40 5-15
sandy clay SM-SC,
loam, fine CL,
sandy loam. CL-ML
8, 9 0-8 Loam SM A-2, A-4 0 95-100 90-100 70-95 25-50 15-25 NP-S
Ascalon 8-18 Sandy clay loam SC, CL A-6 0 95-100 90-100 80-100 40-55 20-40 10-20
18-60 Sandy loam, SC, A-4, A-6 0 95-100 95-100 75-95 35-65 20-40 5-15
sandy clay SM-SC,
loam, fine CL,
sandy loam. CL-ML
0-4 Sandy loam SM A-2, A-4 0 95-100 90-100 60-70 30-40 NP
'tankard 4-60 Fine sand, sand, SP-SM, SM A-2, 0-5 70-100 60-100 40-705-25 --- NP
gravelly sand. A-3,
A-1
11 , 12 0-16 Sandy loam SM A-1, A-2 0 95-100 75-100 35-50 20-35 15-25 NP-5
Dresser 16-25 Sandy clay loam SC A-2, 0 95-100 75-100 50-70 30-50 30-55 10-25
A-6,
A-7
25-30 Sandy loam, SC, SM-SC A-2, A-1 0 90-100 60-100 30-60 20-30 25-35 5-15
coarse sandy
loam, gravelly
sandy loam.
30-60 Loamy coarse SP-SC A-2, A-1 0-5 80-100 35-85 20-50 5-10 20-30 5-10
sand, gravelly
loamy sand,
very gravelly
loamy sand.
13 0-9 Gravelly sandy GM A-1, A-2 0-15 50-65 50-60 15-40 10-Cascajo ' loam. 35 --- NP
9-31 ;Very gravelly GP-GM, A-1 0-15 15-50 15-50 5-30 0-20 --- NP
sandy loam, GP, GM
very gravelly
loamy sand,
very gravelly
sand.
31-60;Very gravelly GP, SP, ; A-1 0-15 10-60 10-60 5-30 0-10
loamy sand, GP-GM, --- NP
very gravelly SP-SM
sand, gravelly
sand.
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 129
TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS
symbol < means less than; > means greater then. The erosion tolerance factor (T) is for the entire
profile. Absence of an entry means data were not available or were not estimated]
I i Risk of corrosion Erosion Wind
Soil name and ;Depth Permea- Available Soil Salinity Shrink- factors erodi-
map symbol bility water reaction swell Uncoated Concrete c bility
capacity potential steel K T__group_
I In In/hr In/in pH Mmhos/cm
1, 2 I 0-10 0.6-2.0 0.20-0.24 6.6-7.8 --- Low Moderate Low 0.24 3 5
Altvan 110-25 0.6-2.0 0.15-0.17 7.4-8.4 <2 Moderate Moderate Low 0.28
125-60 >20 0.02-0.04 7.4-9.0 <2 Low Moderate Low 0.10
,
3•: I
Aquolls 0-48 --- --- --- --- --- ---
48-60 >20 0.04-0.06 7.4-8.4 2-16 Low High Moderate ---
Aquents 0-48 --- --- --- --- --- --- ---
48-60 >20 0.04-0.06 7.4-8.4 2-16 Low High Moderate ---
4t:
Aquolls 0-60 --- --- --- --- --- ---
Aquepts 0-60 --- --- --- --- --- ---
5, 6, 7, 8, 9 0-8 0.6-6.0 0.11-0.16 6.6-7.8 <2 Low Low Low 0.17 5 3
Ascalon 8-18 0.6-2.0 0.13-0.15 6.6-7.8 <2 Moderate Moderate Low 0.24
18-60 0.6-6.0 0.11-0.15 7.9-8.4 <2 Low Moderate Low 0.24
10 0-4 2.0-6.0 0.09-0.12 7.4-8.4 <2 Low Moderate Low 0.10 5 3
Bankard 4-60 6.0-20 0.05-0.08 7.4-8.4 <2 Low Moderate Low 0.10
11 , 12 0-16 0.6-6.0 0.11-0.13 6.1-7.3 --- Low Low Low 0.10 5 2
Bresser 16-25 0.6-2.0 0.15-0.18 6.6-7.3 --- Low Moderate Low 0.15
25-30 0.6-6.0 0.10-0.13 6.6-7.3 --- Low Low Low 0.10
30-60 2.0-20 0.05-0.08 6.6-7.3 --- Low Low Low 0.10
0-9 2.0-6.0 0.07-0.09 7.4-8.4 <2 Low Moderate Low 0.10 5 8
Cascajo 9-31 6.0-20 0.05-0.08 7.4-8.4 <2 Low Moderate Low 0.10
31-60 6.0-20 0.05-0.06 7.4-8.4 <2 Low Moderate Low 0.10
14, 15, 16, 17 0-7 0.6-2.0 0.20-0.24 6.6-8.4 <2 Low Moderate Low 0.37 5 4L
Colby 7-60 0.6-2.0 0.17-0.22 7.4-8.4 <2 Low Moderate Low 0.37
18•:
Colby 0-7 0.6-2.0 0.20-0.24 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
Adena 0-6 0.6-2.0 0.18-0.21 6.6-7.8 <2 Low Moderate Low 0.37 5 5
6-9 0.06-0.2 0.16-0.18 6.6-7.8 <2 High High Low 0.24
9-60 0.6-2.0 0.16-0.18 7.4-8.4 <2 Low High Low 0.32
19, 20 0-14 0.6-2.0 0.14-0.18 7.4-8.4 <2 Low High Low 0.32 5 5
Colombo 14-21 0.6-2.0 0.14-0.16 7.4-8.4 <2 Moderate High Low 0.28
21-60 0.6-2.0 0.14-0.16 7.4-8.4 <2 Low High Low 0.28
21 , 22 0-12 0.2-0.6 0.19-0.21 6.6-7.8 <2 'Moderate Moderate Low 0.24 3 5
Dacono 12-21 0.2-0.6 0.15-0.21 7.4-8.4 <2 High High Low 0.24
21-27 0.2-2.0 0.13-0.18 7.4-8.4 <2 Moderate High Low 0.15
27-60 >20 0.03-0.05 7.4-8.4 <2 Low High Low 0. 10
23, 24 0-7 0.6-2.0 0.16-0.20 6.6-7.8 <2 Low Moderate Low 0.20 5 6
Fort Collins 7-11 0.6-2.0 0.16-0.18 7.4-7.8 <2 Moderate Moderate Low 0.20
11-60 0.6-2.0 0.16-0.18 7.4-8.4 <2 Low High Low 0.20
25, 26 0-4 0.6-2.0 0.14-0.18 6.6-8.4 <8 Low High Low 0.28 5 , 4L
Haverson ; 4-60 0.6-2.0 0.14-0.18 7.4-8.4 <8 Low High Low 0.28
27, 28 0-60 0.06-0.6 0.12-0.17 7.9-9.0 <8 High High High 0.28 5 I 4
Heldt
See footnote at end of table.
132 SOIL SURVEY
TABLE 14.--SOIL AND WATER FEATURES
.. [Absence of an entry indicates the feature is not a concern. See text for descriptions of symbols and such
terms as "rare," "brief," and "perched." The symbol C means less than; > means greater than]
Flooding High water table I Bedrock
Soil name and Hydro- ' Potential
map symbol logic Frequency Duration :Months Depth Kind :Months :Depth:Hard- frost
group : ness action
Ft i i In :
:
1, 2 B None --- --- >6.0 --- -__ >60 --- Moderate.
Altvan
3*:
Aquolls D Frequent---- Brief Apr-Jun 0.5-1.0 Apparent:Apr-Jun >60 --- High.
Aquents D Frequent---- Brief Apr-Jun 0.5-1.0 ApparentApr-Jun >60 --- High.
4*:
Aquolls D Frequent---- Brief Apr-Jun 0.5-1.5 Apparent Apr-Jun >60 --- High.
Aquepts D Frequent---- Brief Apr-Jun 0.5-1.5 Apparent Apr-Jun >60 --- High.
5, 6, 7, 8, 9 B None --- --- >6.0 --- --- >60 --- Moderate.
Ascalon
10 A Frequent---- Brief Mar-Jun >6.0 --- --- >60 --- Low.
Bankard
11 , 12 B None --- --- >6.0 --- --- >60 --- Moderate.
Bresser
13 A None --- --- >6.0 --- --- >60 --- Low.
Cascajo
14, 15, 16, 17---- B None --- --- >6.0 --- --- >60 --- Low.
Colby
r
18*:
Colby B None --- --- >6.0 --- --- >60 --- Low.
Adena C None --- --- >6.0 --- --- >60 --- Low.
19, 20 B Rare --_ --- >6.0 --- --- >60 --- Moderate.
Colombo
21 , 22 C None --- --- >6.0 --- --- >60 --- Low.
D ac o no
23, 24 B None to rare --- --- >6.0 --- --- >60 --- Low.
Fort Collins
25, 26 B Rare to Brief May-Sep >6.0 --- --- >60 --- Low.
Haverson common.
27, 28 C None --- --- >6.0 --- --- >60 --- Low.
Heldt
29, 30 A None --- --- >6.0 --- --- >60 --- Moderate.
Julesburg
31 , 32, 33, 34---- B None --- --- >6.0 --- --- >60 --- Low.
Kim
35*:
Loup D Rare to Brief Mar-Jun +.5-1.5 Apparent Nov-May >60 --- Moderate.
common.
Boel A Occasional Brief Mar-Jun 1.5-3.5Apparent Nov-May >60 --- Moderate.
36*:
Midway D None --- --- >6.0 : --- , --- 10-20 Rip- Low.
pable
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 135
TABLE 15.--CLASSIFICATION OF THE SOILS
Soil name Family or higher taxonomic class
Adena Fine-loamy, mixed, mesic Ustollic Paleargids
Altvan Fine-loamy over sandy or sandy-skeletal, mixed, mesic Aridic Argiustolls
Aquents Aquents
Aquepts Aquepts
Aquolls Aquolls
Ascalon Fine-loamy, mixed, mesic Aridic Argiustolls
Bankard Sandy, mixed, mesic Ustic Torrifluvents
Boel Sandy, mixed, mesic Fluvaquentic Haplustolls
Bresser Fine-loamy, mixed, mesic Aridic Argiustolls
Cascajo Sandy-skeletal, mixed, mesic Ustollic Calciorthids
Colby Fine-silty, mixed (calcareous) , mesic Ustic Torriorthents
Colombo Fine-loamy, mixed, mesic Torrifluventic Haplustolls
Dacono Clayey over sandy or sandy-skeletal, montmorillonitic, mesic Aridic Argiustolls
Fort Collins Fine-loamy, mixed, mesic Ustollic Haplargids
Haverson Fine-loamy, mixed (calcareous) , mesic Ustic Torrifluvents
Heldt Fine, montmorillonitic, mesic Ustertic Camborthids
Julesburg Coarse-loamy, mixed, mesic Aridic Argiustolls
Kim Fine-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Loup Sandy, mixed, mesic Typic Haplaquolls
Midway Clayey, montmorillonitic (calcareous) , mesic, shallow Ustic Torriorthents
Nelson Coarse-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Nunn Fine, montmorillonitic, mesic Aridic Argiustolls
Olney Fine-loamy, mixed, mesic Ustollic Haplargids
Osgood Loamy, mixed, mesic Arenic Ustollic Haplargids
Otero Coarse-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Paoli I Coarse-loamy, mixed , mesic Pachic Haplustolls
Renohill I Fine, montmorillonitic, mesic Ustollic Haplargids
Shingle I Loamy, mixed (calcareous) , mesic, shallow Ustic Torriorthents
Tassel I Loamy, mixed (calcareous) , mesic, shallow Ustic Torriorthents
Terry I Coarse-loamy, mixed, mesic Ustollic Haplargids
Thedalund I Fine-loamy, mixed (calcareous) , mesic Ustic Torriorthents
Ulm I Fine, montmorillonitic, mesic Ustollic Haplargids
�•1stic Torriorthents I Ustic Torriorthents
31ent I Mixed, mesic Ustic Torripsamments
,ona I Coarse-loamy, mixed, mesic Ustollic Haplargids
Weld I Fine, montmorillonitic, mesic Aridic Paleustolls
Wiley ; Fine-silty, mixed, mesic Ustollic Haplargids
trU.S.GOVERNMENT PRINTING OFFICE: 1980-251-6GG127
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