HomeMy WebLinkAbout20071983.tiff EXHIBIT I -SOILS INFORMATION
The information provided in this Exhibit is intended to satisfy the requirements outlined in Section
6.4.9 of the Colorado Mined Land Reclamation Board Construction Material Rules and
Regulations:
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(1) In consultation with the Soil Conservation Service or other qualified person, indicate on
a map(in Exhibit C)or by a statement the general type, thickness and distribution of soil
over affected land.
The soil types on the site are shown on the Existing Conditions Map(Exhibit C). Please refer
to the following summary logs of exploratory drillings and descriptions of soil descriptions from
the Soil Survey of Weld County, Co, USDA Soil Conservation Service for further details.
Hall-Irvin Corporation—Parker/Dersham Sand and Gravel Mine-MLRB 112 Permit Application
Exhibit I-1
2007-1983
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LD COUNTY, COLORADO, SOUTHERN PART 7
brief description of the soil profile. In- each/description, The,acreage and proportionate extent of reach map unit
the 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 sail
'iscussed. • . • ,• uses:is given for each kind of soil in other tables in this .
The map units en 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.
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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 Nun; for example, Typically the surface layer of the Altvan soil is grayish
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• are names of two soil.series. .... . brown loam about 10 inches Cluck. 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
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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.ormanage- Surface runoff is slow, and the erosion hazard is low:
- - ment.For example, Olney fuse sandy lam, 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
kinds offsoil. Such map.units.are called soil complexes and gram' , potatoes,
undifferentiated.groups: . and onions. An example of a'suitable cropping system nil is 3
A soil complex consists,of areas of two or more soils• to 4 years of alfalfa followed by corn, corn for silage,
..that are so intricately mixed or so small in size.that they sugar,beets, small grain, le beans. The high clay content
- annot be shown separately on the soil map. Each area'in: • •and the rapidly-.permeable substratum slightly restrict
aides some of each of the two or more dominant soils, All some crops.
and the pattern and proportion are somewhat similar in "methods of irrigation are suitable, but furrow ir-
a - all areas. Midway-Shingle complex, 6-to.20 percent slopes, rogation- 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..
be mapped individually but are soils that could. mapped as Windlireaka and environmental plantings of trees and
one unit because there is little value in separating them. shrubs commonly grown in the area are generally •
owell
The pattern and proportion of the soils are not uniform. sorted 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-Beef 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. 7-• redcedar, ponderosa pine, Siberia elm, Russian-olive, and •
. Meet 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 peashruli;and American plum.
Some of these soils have properties that differ substan- This sol can produce.habitat elements that are highly
tiaily froth those-of the dominant soil or soils.and thus suitable for operand 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=oontrast- 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-
bot.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.iittle. or no vegetation. Such and recreational development. The chief limiting soil Yea-
places are called miseellanedits 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
• • „rop is' an example. Some of these areas are too small to permeability of th'e sand and gravel substratum. Septic
delineated and are identified.by a especial symbol.on tank absorption fields function properly, but in places the
I .e 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. Aqueiits, which have a lighter
Lawns, shrubs, and trees grow well. Capability subclass colored surface.layer, make up about 35 percent. About 5
IIa 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
Tong 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 underlyingmaterial
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 learn.: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, switch a, and western wheatgrass: Saltgrass,
is suited to all crops commonly grown in the area, includ=,. sedge, rush, and alkali bluegrass also
. . . big corn; sugar beets, beans, alfalfa, small grain, potatoes, are prominent.
and onions. An exam le of a suitable Potential production ranges'from'6,000 pounds per acre in
P cropping system is 3 favorable years.to 2,000 pounds in unfavorable ears. 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 ,saeaton and western wheat
lining, and installing pipelines may be needed'for proper sedge, grass decrease and saltgrass,
water application B , and rush increase.
All• methods of irrigation are suitable, but furrow.ir- Management of:vegetation should�be based on taking
' ligation is the most common. Barnyard manure and coin- half and leaving half of the total annual production. Seed-
merciai'fertilizer are needed for top yields. ing is difficult and costly because numerous tillage prac-
-Windbreaks and environmental plantins of trees and tides are -required to eliminate the saltgrass sod.
shrubs commonly grown in the area are.generally•well Swltchgrasa,• western .wheatgrass, alkali 'sacatbn, tall
suited •:to this soil. ,Cultivation to control competing wheatgrass, and tall fescue are suitable for seeding. They
. 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 saltgrase sod. A grass drill should be used.
redcedar, ponderosa pine,Siberian elm, Russian-olive, and Seeding early in spring has proven Most auccessfuL
hackberry. The shrubs best,suited are skunkbush sumac, • W etland wildlife, especially waterfow l'utilize this unit.
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lilac, Siberian peas`lu ub,and American plum. • . The wetland plants provide nesting'and protective cover,
This soil can produce habitat elements that are highly an well as some food The nearby- irrigated cropland;
' • suitable for openland wildlife including pheasayt, cotton- where wildlife obtain much of their food and find protec-
. tail,.and mourning—dove,-Stich 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 ()Penland wildlife,especially pheasant, use this unit for
undisturbed nesting cover would .enhance openland wil- cover and nesting. Deer find excellent cover in seine
•• dlife populations: . . .. areas. .
This Altvan soil has fair to good potential for urban . These valuable wildlife areas should be protected from I
.. 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 ainurce of sand and
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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 — quo s an quepts, flop ed. This nearly eve
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• substratum does not contain enough fines to properly Chap 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. •
11/2 J COUNTY, COLORADO; SOUTHERN PART 29
- _ -'-
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have good survival are Rocky Mountain juniper, eastern . The potential native vegetation is dominated by.
• redcedar, ponderosa pine, Siberian elm,'Rusaian-olive, and western wheatgrass and blue.grama. Buffalogriss is also
f- ikberry. The shrubs best suited are skunkbush sumac, present. Potential production ranges from 1,000 pounds
.c, Siberian peashrub;'and American plum. - per acre in favorable years to 600 pounds in unfavorable
Wildlife is an important secondary use of this soil. The years. As range condition deteriorates, a blue grama-buf-
•
I cropland areas provide favorable habitat for ring-necked .falograss sod forms. Undesirable weeds and annuals..in:
pheasant-and mourning dove. Many nongame'species can wade the site as'radge condition becomes poorer.
• be attracted by establishing-areas for nesting and escape Management of-vegetation of this soil should be based
• cover. For pheasants, undisturbed nesting cover is essen- on taking half and leaving half of the total annual produc-
tial and should be included in plans for habitat develop- tion. Range pitting can help in reducing runoff. Seeding is
ment, especially in areas of intensive agriculture. desirable if the range is in poor condition. Western
. This soil has fair to poor potential for urban.develop- wheatgrass, blue grama, sideoats grams, buffalograss, pu-
ment. It has moderate to high shrink-swell,low strength, bescent wheatgrass, and crested wheatgrass are suitable
and moderately slow permeability. These features create for seeding. The grass selected should meet-the seasonal
problems in dwelling and road construction.•Those.areas. -requirements of livestock. It can be seeded into a clean,
that have loam or sandy.loam in the lower part of the firm sorghum stubble; or it can•be drilled. into a firm
substratum are suitable for septic tank absorption fields prepared seedbed. Seeding early in spring has proven
and foundations. Some areas of this soil are adjacent to most successful. '
' streams and are subject to occasional flooding. The poten- Windbreaks and environmental plantings are generally
tial is fair for such recreational development as camp and well suited to this soil. Cultivation' to control competing
• picnic areas and playgrounds. Capability class I irrigated. vegetation should be continued for as many years as
'42—Nunn clay loam, 1 to 3 percent slopes. This is a possible following planting. Trees that are best suited and
• deep, well drained soil on terraces and smooth-plains at ` have good survival are Rocky Mountain juniper, eastern -
• elevations of 4,550 to 5,150 feet. It formed in mixed allu- redeedar, ponderosa pine,Siberian elm,•Russian-olive;and
• vium and eolian deposits. Included in mapping are.small; hackberry. The shrubs best suited are skunkbush sumac,
long and narrow areas. of sand and gravel'.deposits and lilac, Siberian peashrub;and American plum. •
small areas of soils that are subject to occasional flooding. Wildlife is an important secondary use.of this soil. The
Some leveled areas are also included. cropland areas provide favorable habitat for ring-necked
Typically the surface layer of this Nunn soil is grayish pheasant and mourning dove. Many nongame species can
wn clay loam aobut 9 inches thick. The subsoil is light be attracted by establishing areas for nesting and escape
..-.iwnish gray day-loam about 14 inches thick.The upper cover. For pheasants,-undisturbed nesting cover is essen-
part •of the substratum.Is light brownish gray'clay loam tial and should be included in plans for habitat develop-
. The lower part to a depth of 60 inches is brown sandy inent, especially in areas of intensive agriculture; Range-
loan.. land wildlife, for example, the pronghorn antelope, can be
Permeability is moderately slow. Available water attracted by 'developing livestock watering facilities,
capacity is high. The effective rooting depth is 60 inches managing livestock grazing, and reseeding where needed.
-or more. Surface runoff _is _medium, -and the erosion This soil has fair to poor potential for urban develop=
hazard is low. " ment. It has moderate to.high shrink swell, low Strength,
In irrigated areas this soil is:suited to.all crops corn- and.moderatelyslow.permeability. These features create
nionly grown .in the•area,.including corn; sugar beets, problems in dwelling and road construction. Those areas
beans, alfalfa, small grain, potatoes, and onions. An exam- that have loam or sandy loam in-the lower part of the
pie of a suitable cropping system is 8 to 4 years of•alfalfa substratum are suitable•for septic tank absorption fields
followed by corn, corn'for.silage, sugar beets;small grain, 'and foundations. Some areas of this soil are adjacent to
-. or beans. Generally such characteristics as the high clay. streams and are subject to occasional flooding. The poten--
content or the rapidly permeable substratum slightly tial is fair for such-recreational development as camp and
restrict some crops. picnic areas and playgrounds. Capability subclass IIe, ir- •
All methods of irrigation are suitable, but furrow ir- rigated, IIIc nonirrigated; Clayey Plains range site. .
rigation is the 'most common. Proper irrigation water l 43—Nunn loamy sand, U to 1 percent slopes. This is a
• management is essential. Barnyard manure and commer- deep, :well drained soil on terraces at:elevations of 4,700
cial fertilizer are needed for top yields. - to 4,900 feet. It formed in alluvium along Box Elder -
. In nonirrigated areas most of the acreage•is:in small Creek. Included•in mapping are small areas of soils that--
grain and it is summer. fallowed .in alternate years: have a loamy subsoil and small areas of soils that are sub-
Winter wheat is the principal crop. The-predicted average ' ject to rare flooding. - -
yieldis 33 bushels per acre. If the crop is winterkilled; Typically the surface layer of this Nunn soil is brown-1'1;-
spring wheat can be:seeded. Generally precipitation is too loamy sand overburden about-9 inches thick. The subsoil .
•
Ecuador-beneficial use of fertilizer. . :- ' - is dark to very dark grayish brown clay loam about 21
( ubble mulch farming, atriperopping, and. minimum til- inches thick..The substratum to a depth of 60 inches is
.age are needed to control soil blowing-and water erosion. loamy very fine sand, loamy sand, or sand. • •
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