HomeMy WebLinkAbout20022074.tiff IMIArrlsMINtiwroII __MISIOw JV Eit I SHEIET NO.28
LCINGMONT& l3OUi4nnt VAILLEIr 1 INELD COUNTY,COLORADO, SOUTHERN PART
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S SOIL SURVEY
filter the leachate. Sewage lagoons require sealing. 60 percent of the unit. Aquents, which have a lighter
Lawns, shrubs, and trees row 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 beets, small grain, or beans. Land leveling, ditch sacaton, and western wheatgrass decrease and saltgrass,
lining, 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 coin- ing is difficult and costly because numerous tillage prac-
mercial fertilizer are needed for top yields. tices are required to eliminate the saltgrass sod.
Windbreaks and environmental plantins of trees and Switchgrass western w heatgrass, alkali sacaton, tall
shrubs commonly grown in the area are are generally well wheatgrass, and tall fescue are suitable for seeding. They
suited to this soil. Cultivation to control competing can be seeded into a clean, firm seedbed. Seedbed
vegetation should be continued for as many years as
preparation usually requires more than 1 year to
possible following planting. Trees that are best suited and
eliminate the saltgrass sod. A grass drill should be used.
have good survival are Rocky Mountain juniper, eastern
Seeding early in spring has proven most successful.
redcedar, ponderosa pine, Siberian elm, Russian olive, and Wetland wildlife, especially waterfowl, utilize this unit.
hackberry. The shrubs best suited are skunkbush sumac, The wetland plants provide nesting and protective cover,
lilac,Siberian peashrub, and American plum. as well as some food. The nearby irrigated cropland,
This soil can produce habitat elements that are highly
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 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 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
subclass VIw; Salt Meadow range site.
permeability of the sand and gravel substratum. Septic—"gtveL-G'aP bikt
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-.maB wait-is-in-depressions in smooth plains and along the
filter the leachate. Sewage lagoons require sealing. bottoms of natural drainageways throughout the survey
Lawn,,._shrnbsiand-trees grow well. Capability subclass area. Aquolls, which have a dark colored surface layer,
It'irrigated.
--- _ _ make up about 55 percent of the unit. Aquepts, which
3—Aquolls and Aquents, gravel)y--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 alt-the--majnr_stre ts__in--thrssurvey 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.
WELD COUNTY, COLORADO, SOUTHERN PART
9
These are deep, poorly drained soils that formed in If summer fallowed in alternate years,o winter wheat, barley, and sorghum.soil is ter
well
tcent alluvium. No one pedon is typical. Commonly the suited
is the principal crop. The predicted rghum. yield is
soils have a mottled, mildly to moderately alkaline loamy
or clayey surface layer and underlying material that ex- Wheat bushels
be seeded.cre. If the crop
precipitationis winterkilled,
too low
for aof tends to a depth of 60 inches or more. In places they have beneficial use can fertilizer.
a gleyed layer in the underlying material. Stubble mulch farming, striperopping, and minimum Most of the acreage is subject to excessive runoff. The
til-
water table is at or near the surface in spring and during lage are needed to control soil blowing and water erosion_
the peak of the irrigation season. Terracing also may be needed to control water erosion.
These soils are used for rangeland and wildlife habitat. The potential native vegetation on this range site is
Some small areas are irrigated pasture. dominated by sand bluestem, sand reedgrass, and blue
The potential native vegetation is dominated by grams. Needleandthread, switchgrass, sideoats grams,
switchgrass, prairie cordgrass, saltgrass, alkali sacaton, and western wheatgrass are also prominent. Potential
big bluestem, indiangrass, western wheatgrass, slender Production ranges from 2,200 pounds per acre in favora-
wheatgrass, sedge, and rush. Cattails and bullrush grow ble years to 1,800 pounds in unfavorable years. As range
condition deteriorates, the sand bluestem, sand reedgrass,
in the swampy spots associated with these range sites. and switchgrass decrease and blue grams, sand dropseed,
Potential production ranges from 4,000 pounds per acre in and sand sage increase. Annual weeds and grasses invade
favorable years to 3,000 pounds in unfavorable years. As the site as range condition becomes poorer.
range condition deteriorates, the tall and mid grasses Management of vegetation should be based on taking
decrease, production drops, and saltgrs, sedge, and rush half and leaving half of the total annual production. Seed-
increase. The farming and irrigation in adjacent areas has ing is desirable if the range is in poor condition. Sand
increased the amount of salts on much of the acreage. bluestem, sand reedgrass, switchgrass, sideoats grams
Management of vegetation on this soil should be based blue grams, pubescent wheatgrass, and crested wheat-
on taking half and leaving half of the total annual produc-
grass are suitable for seeding. The grass selected should
lion. Switehgrass, big bluestem, indiangrass, western meet the seasonal requirements of livestock. it can be
wheatgrass, pubescent wheatgrass, intermediate wheat- seeded into a clean, firm sorghum stubble, or it can be
grass, tall wheatgrass, and tall fescue are suitable for drilled into a firm prepared seedbed. Seeding early in
seeding. The plants selected should met the seasonal spring has proven most successful.
' requirements of livestock. For successful seeding, a firm Windbreaks and environmental plantings are generally
prepared seedbed is needed. A grass drill should be used. suited to this soil. Soil blowing, the principal hazard in
Seeding early in spring has proven most successful. Til- establishing trees and shrubs, can be controlled by cul-
lage is needed to eliminate the undesirable vegetation. tivating only in the tree row and by leaving a strip of
Wetland wildlife, especially waterfowl, utilize this unit. vegetation between the rows. Supplemental irrigation
The wetland plants provide nesting and protective cover may be needed at the time of planting and during dry
as well as some food. The nearby irrigated cropland, periods.Trees that are best suited and have good survival
where wildlife obtain much of their food and find protec- are Rocky Mountain juniper, eastern redcedar, ponderosa
tive cover, makes this unit valuable to both wetland and pine, Siberian elm, Russian-olive, and hackberry. The
openland wildlife. shrubs best suited are skunkbush sumac, lilac, and Siberi-
Openland wildlife, especially pheasant, use this unit for an peashrub.
cover and nesting. Deer find excellent cover in some Wildlife is an important secondary use of this soil. The
areas. These valuable wildlife areas should be protected cropland areas provide favorable habitat for ring-necked
from fire and fenced to prevent encroachment and pheasant and mourning dove. Many nongame species can
overuse by livestock. They should not be drained. Capa- be attracted by establishing areas for nesting and escape
bility subclass VIw; Aquolls in Salt Meadow range site, cover. For pheasants, undisturbed nesting cover is essen-
Aquepts in Wet Meadow range site. tial and should be included in plans for habitat develop-
5—Ascalon sandy loam, 1 to 3 percent slopes. This is ment. Rangeland wildlife, for example, the pronghorn an-
a deep, well drained soil on uplands at elevations of 4,600 telope, can be attracted by developing livestock watering
to 5,200 feet. It formed in alluvium. Included in mapping facilities, managing livestock grazing, and reseeding
are small areas of rock outcrop. where needed.
Typically the surface layer is brown sandy loam about Few areas of this Ascalon soil are in major growth and
10 inches thick. The subsoil is pale brown and yellowish urbanized centers. The shrink-swell potential of the sub-
brown sandy clay loam about 15 inches thick. The sub- soil as it wets and dries is the most limiting soil feature
stratum to a depth of 60 inches is calcareous fine sandy struc ngt roads.be nCap bility in psubcla s lanning hIIfes,nonirrigated;
con-
loam
Permeability is moderate. Available water capacity is Sandy Plains range site.
r high. The effective rooting depth is 60 inches or more. 6—Ascalon sandy loam, 3 to 5 percent slopes. This is
Surface runoff is slow, and the erosion hazard is low. a deep, well drained soil on uplands at elevations of 4,600
y.
r••••
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 I Shallow Dwellings Dwellings Small Local roads
map symbol I excavations without with commercial I and streets
basements basements buildings
1, 2 :Severe: Moderate: Moderate: :Moderate: Moderate:
Altvan ; cutbanks cave. shrink-swell. shrink-swell. I shrink-swell. shrink-swell,
1 frost action.
�: A lls ;Severe: Severe: Severe: :Severe: Severe:
l� floods, floods, floods, ; floods, floods,
wetness. wetness. wetness. ; wetness. wetness,
frost action.
Aquents Severe: ;Severe: Severe: ;Severe: ;Severe:
floods, floods, floods, ; floods, I floods,
wetness. wetness. wetness. : wetness. ; wetness,
; frost action.
Pie://
Gnnnllc Severe: Severe:
Severe: Revere: ;Severe:
; floods, floods, floods, floods, floods,
I wetness. wetness. wetness. ; wetness. ; wetness,
I frost action.
r.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 : I low strength.
16, 17 ;Slight ;Slight Slight Moderate: Moderate:
Colby I slope. low strength.
; ;
18+ ;
Colby ;Slight ;Slight Slight Moderate: Moderate:
: slope. low strength.
;
^4dena ;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
l 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 I sanitary for landfill
fields landfill landfill
1, 2 Slight Severe: Severe: :Slight Fair:
Altyan seepage. seepage. thin layer.
i
JS`f-
/ 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.
,.
f.
/,quolls ;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.
'a, Ascalon seepage. seepage. seepage.
7 Slight Severe: Severe: Severe: Good.
Ascalon slope, seepage. seepage.
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.
184:
Colby Slight Severe: Slight Slight ;Good.
slope.
•
Adena Moderate: Moderate: Slight Slight 'Good.
percs slowly. seepage, •
slope.
•
19 Moderate: Severe: Moderate: Moderate: :Good.
Colombo floods. floods. floods. floods.
•
•
20 Slight Moderate: Slight Slight ;Good.
Colombo slope,
seepage.
•
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN FART ill
TABLE 9.--WATER MANAGEMENT
ne 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)
.
races Grassed
Irrigation Ter
Soil name and : Pond Embankments, : Drainage and waterways
map symbol reservoir dikes, and : . diversions
areas levees
1 2 Seepage Thin layer Favorable Favorable
Rooting depth Rooting depth.
/2,11v an
/..,
+5Aolls Floods, Floods, Wetness Wetness.
Ag4 poor outlets. wetness.
Floods, Floods, Wetness Wetness.
Aquents poor outlets. wetness.
yA4/ Wetness Wetness.
C Auolls Floods, Floods,
: poor outlets. wetness.
' Wetness Wetness.
Aquepts i , :Floods, 'Floods,
I poor .outlets. wetness.
1 Seepage, Piping, :Slope Slope, Erodes easily, Erodes easily.
5 erodes easily. piping.
Ascalon slope. low strength. i
6 Seepage, Piping, Slope Slope, Erodes easily, Erodes easily,
Ascalon slope. low strength. erodes easily. piping. slope.
Slope Slope, Erodes easily, Erodes easily,
7 Seepage
Piping,low strength. erodes easily. piping, slope.
Ascalon slope. slope.
r+ Favorable Favorable Erodes easily, Erodes easily.
Seepage, Piping, piping.
.scalon slope. low strength.
Slope Slope, Erodes easily, Erodes easily.
9 Seepage Piping erodes easily. piping.
Ascalon slope. low s strength.
Cutbanks cave, Droughty, Erodes easily, Droughty,
Bankard
Seepage Piping,
B ankard seepage, floods, floods, piping. erodes easily.
erodes easily. poor outlets. seepage.
Favorable Droughty -Erodes easily, Erodes easily.
77 Seepage Favorable piping.
Bresser
Seepage, Favorable
Slope
Slope, Erodes easily, Erodes easily.
12 erodes easily. piping.
Bresser slope.
a e Slope, Complex slope, Droughty,
13C Seepage See p g Slope droughty. Piping. slope.
Cascajo slope. too sandy.
14 Seepage Low strength, Favorable Favorable Favorable Favorable.
Colby piping.
15 Seepage Low strength, Favorable Favorable Favorable Slope, easily.
Colby piping.
Low strength, Slope Slope, Favorable Slope,
16, 17by Seepage erodes easily. erodes easily.
Colby piping.
1R':
Colby Seepage Low strength, Slope, Favorable Slope,
Slope erodes easily. erodes easily.
piping.
, Slope,p
Adena Slope, Low strength, Slope, Slope, Slope,
seepage. piping. pares slowly. percs
slowly. piping. Perns slowly.
t9 Seepage Low strength, Floods Favorable Erodes easily Erodes easily.
Colombo 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 I
1 Slight Slight Slight Slight.
Altvan
Slight Slight Moderate: Slight.
an slope.
/' 3?: ' .
//' Aqu611s Severe: Severe: Severe: Severe:
1111 wetness, wetness, wetness, wetness,
floods. floods. floods. floods.
Aquents Severe: Severe: Severe: Severe:
wetness, wetness, wetness, wetness,
7r1i floods. floods. floods. floods.
\( A9Uolls Severe: Severe: Severe: • Severe:
\I\ 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.
B 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.
Bresser
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.
18.1: .
,0"1-, Colby Moderate: Moderate: Severe: Moderate:
dusty. dusty. slope. dusty.
See footnote at end of table.
124 son. 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 1Frag- 1 Percentage passing I 1
ments ; sieve number-- ;Liquid ; Plas-
Soil name and ;Depth; USDA texture ; , ; ; limit 1 ticity
Unified ! AAgHrn ,> 3
map symbol
; 1 ; ,inches,' 4 +' 10 ; 40 ; 200 1 ; index, InI Pct ;
; ; Pot ; '
, I , '
' ' 0 ;90-100185-100 60-95 150-75 1 1u-30 I 5-i0
1, 2 ; 0-lO;Loam CL-ML ;A-a ;
A 3-tvan '10-25 Clay loam, loam CL 1A-6, A-71 0 195-100195-100 85-100;70-80 ; 35-50 ; 15-25
25-50 Sind and el cP SP-5M1A-1 1 0 ;75-95 ;70-90 25-35 ; 0-10 ; - ;
7. J I I ; 1 ;
•
11 q,VU11J N
k� ;a6-60'sana, gravelly ;SP, SP-SM;A-1 ; 0-10 160-90 ;50-70 ;30-50 ; U-iu -- ;
sand. ; ' I 4
I 1
f I I
1
1 I
I I
I I
1 II 1I I
;
/Alifants
0-48,Variable 1
a8-6015and and gravel 1SP, SP-SM;A-1 ; 0-10 ;60-90 ;50-70 130-50 ; 0-10 ; NP
, 1 ; ; 1 1 1
I I
i , 1 , I ' ' ` 1 ---
411: ' ---
0-60; ara ; --- ; • ; ; ; --- i _ ; - ; 1
+ AQV0115 V tble , + ; ; • 1
1 1 + ;
\ ''_Aquepts ; 0-60;Variable --- ; --- ; --- ; --- ; ; --- --- ---
; 1 1 , 1
•
c
_ ! 0_N !Snd' loam SM ;A-2, A-4; 0 195-100190-100;70-95 25-50 ; 15-25 ; NP-5
Ascalon 1 8-18:Sandy clay loam SC, CL IA-6 ; 0 195-1UU;90-100180-100 40-S5 ; 20-40 1 '•0-20
118-60;Sandy loam, SC, 1A-4, A-61 0 195-100195-100 75-95 35-65 120-40 ; 5-15
! sand' clay SM-SC, ; ' •
. ' • '
; ; loam, fine , CL, ; ; i
; sandy loam. CL-ML I ; + ' ' ` `
1 ! ; 1 ; , 1 ' '
8, 9 ; 0-8 ;Loam SM IA-2, A-4; U :95-100;90-100 70-95 25 ;
15-25 : HP-5
. Ascalon ; 8-18:Sandy clay loam SC, CL 1A-6 ; 0 ;95-100190-100 80-100 40-55 ; 20-40 ; 10-20
!18-50;Sand' loam, SC, :A-4, A-6; 0 195-100;95-100 75-95 35-65 120-40 ; 5-15
I sandy clay SM-SC, ; 1 1 1
loam, fine CL, ; •
sandy loam. CL-ML ; ! ' ' I
10 ; 0-4 ISandy loam SM ;A-2, A-41 0 ;95-100 90-100;60-70 ;30-40 ; --- NF
;Ankard ; 4-60;Fine sand, sand, SP-SM, SMIA-2, 1 0-5 170-100 60-100;40-70 1 5-25 ; '
1 i gravelly sand. ; I A-3, i '
, ' ' '
, I A_1 ; ; , I 1 ; i
I
I I I
; ; I I
I
+3S_Gn �?t1_7K ! 15_75 ! 11-_5
11 , 12 1 0-1615andy loam iSM 1A-1, A-21 0 195-100175-10Q 1a-5
0 ;95-100;75-100 50-70 ;30-50 ; 30-55 1
Dresser ;16-251Sandy clay loam ;SC IAA-, 1 1 1 1
1 1 A-7 ; !
25-30;Sandy loam, 1SC, SM-SC;A-2, A-11 0 190-100:60-100 30-60 120-30 ; 25-35 1 5-15
coarse sandy ; , : 1
; loam, gravelly 1 ' 1 ;
sandy loam. ; 1 ' ' ' ` 1
,30-601Loamy coarse ,SP-SC ,A-2, A-11 0-5 80-100135-85 120-50 1 5-10 : 20-30 $ 5-10
sand, gravelly • i ; ; , •
1 I loamy sand, 1 , ; ; `
1 ,
very gravelly 1 1 1 ' ; ` 1
1 ; loamy sand. ; ; 1
,
13 1 0-9 ;Gravelly sandy GM IA-1, A-21 0-15 ;50-65 150-60 115-40 110-35 1 --- 1 NP
Cascajo 1 • loam. ---
1 9-31 Very gravelly GP-GM 1A-1 ; 0-15 115-50 115-50 15-30 1 0-20 II NP
; sandy loam, GP, GM ; ; ; , 1
! 1
1 very g, aveliy , 1 , 1
' 1 , 1
1 loamy sand, '
1 ' ' 1 1 1 1 ' '
very gravelly 1 1 ; 1
sand.
131-60,Very gravelly ;GP, SP, A-1 1 0-15 ;10-60 110-60 1 5-30 1 0-10 1 1 NP
; I loamy sand, 1 GP-GM, , 1 '
' co_CM ' ' ; ; ; 1 1
` ; ; ; ; 1
1 I sand, gravelly ; ' 1
sand. 1 1 ' ; ; ; ' '
, I , 1 1 1
�^ ;
See footnote at end of table.
WELD COUNTY, COLORADO, SOUTHERN PART 129
TABLE 13.--PHYSICAL AND CHEMICAL PROPERTIES OF SOILS
The 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 Risk of corrosion : Erosion Wind
Soil name and ;Depth; Permea- ;Available Soil ;Salinity Shrink- ; , ; factors erodi-
map symbol : : bility water reaction ' swell ;Uncoated :Concrete : bility
; : capacity potential i steel ; K T group_
In ; In/hr In/in �H Mmhos/cm I , ---
, 1 1 I
1 1 • , 1 -
1, 2 ; 0-101 0.6-2.0 0.20-0.24 6.6-7.8 --- ,Low ;Moderate ;Low 0.24 3 5
Altvan ;10-25 0.6-2.0 0.15-0.17 7.4-8.4 : <2 ;Moderate ;Moderate ;Low 0.28
. :25-60 >20 0.02-0.04 7.4-9.0 ' <2 ;Low ;Moderate ;Low 0.10 .
3�• : 1 1 1
AR6olls ; 0-48; --- --- --- --- ; :
!4a-6n_ ; >1n 0.414-f$ 06 7,43_8.4 2_16 !Lo'- '4igh--- -- Mcdcrctc ;
81
:
Aquents : 0-48; --- ; --- : --- : --- ; ; --- ;--- ---
!4R-R0: 20 !0.04-0.06; 7.4_R,a 2_115 !Tow !Nigh 'Moderate
: 1 ; ; : ;
Agoolls 1 0-60: --- ; 1 ! !_-- �--- _--
I 1 ; , 1 ,
Aquepts ; 0-60: --- ; --- : --- ; --- ; : ; ;--- --
. I I , ,
5, 6, 7, 8, 9 1 0-8 1 0.6-6.0 ;0.11-0.16; 6.6-7.8 ; <2 Low ;Low ;Low 10.171 5 : 3
Ascalon 1 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 10.11-0.15 7-9-8.4 : <2 Low ;Moderate !Low ;0.2!4!
; ; : I : ;
10 : 0-4 : 2.0-6.0 ;0.09-0.12; 7.4-8.4 1 <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 10.10!
; ; ; ; : : ; 1 ;
11 , 12 : 0-161 0.6-6.0 ;0.11-0.13: 6.1-7.3 : --- Low :Low ;Low ;0.10; 5 2
Bresser 116-25' 0.6-2.0 ;0.15-0.18; 6.6-7.3 : --- Low !,Moderate ;Low 10.151
;25-30 0.6-6.0 ;0.10-0.13: 6.6-7.3 : --- :Low Lou; :Low ;0.10;
:30-60 2.0-20 :0.05-0.08; 6.6-7.3 : --- :Low :Low ;Low ;0.10: :
, , ,
, : 0-9 1 2.0-6.0 ;0.07-0.09; 7.4-8.4 ; <2 :Low ;Moderate ;Low ;0. 10; 5 8
Cascajo ; 9-311 6.0-20 ;0.05-0.08: 7.4-8.4 : <2 :Low ;Moderate ;Low ;0.10; :
131-60: 6.0-20 :0.05-0.06: 7.4-8.4 ; <2 ;Low ;Moderate ;Low :0.101 1
; ; ; ; I I i I ,
14, 15, 16, 17 1 0-7 I 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 10.17-0.22: 7.4-8.4 : <2 :Low ;Moderate Row ;0.37:
i ; ; ; ; i ; :
18': I, , , 11 1
Colby 1 0-7 : 0.6-2.0 ;0.20-0.24; 6.6-8.4 1 <2 ;Low :Moderate ;Low ;0.37; 5 ; 4L
; 7-60; U.6-2.0 ;u.ii-U.2+?; 7.4-8.4 ; <2 ;Low ;Moderate :Low 10.37;
: ; ; 1 1 1 1 , 1 1 :
Adena ; 0-6 : 0.6-2.0 :0.18-0.21; 6.6-7.8 1 <2 :Low ;Moderate :Low ;0.37: 5 : 5
; 6-9 ;0.06-0.2 ;0. ,6-0. 18; 6.6-7.8 ; c2 ;High ;High Low {0.24;
: 9-60; 0.6-2.0 :0.16-0.18: 7.4-8.4 1 <2 ;Low ;High Low 10.32;
, I I I I
I I I 1 1 I ,
19, 20 1 0-14; 0.6-2.0 ;O. 14-O.18; 1.4-0.4 , <2 Low ;Hign .32 ; 5 ; 5
i LOw------iU
Colombo '14-21 : 0.6-2.0 :0.14-0.16; 7.4-8.4 ; <2 Moderate ;High ;Low :0.281 :
21-601 0.6-2.0 ;0.14-0.16; 7.4-8.4 1 <2 Low ;High :Low :0.28: :
; I i I i 1 ;
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 10.24
X21-27 0.2-2.0 0.13-0.18; 7.4-3.4 ; <2 Model dte High ;Low ;0.15
27-60 >20 0.03-0.05: 7.4-8.4 1 <2 Low High :Low 10.10,
1 1
1 1 1 , 1 I
231
3, 2 f1-_- _._ - _ - 0-7 .0.6-2.0 0-15-0-20; 6.6-7.8 1 <2 :Low Moderate :Low I.. 1 ..'JGVi 5
Fort Collins 7-11 0.6-2.0 0.16-0.18: 7.4-7.8 1 <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 ; 41
Meyerson ; 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 10.28 5 : 4
Heldt ; , : ; : ;
See footnote at end of table.
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