• '' ~ EXHIBIT "AA" •
<br />i
<br />$ SOIL SURVEY
<br />filter t e ]eachate. Sews a lagoons re ire sealing. 60 percent of the unit. Aqu ents, which have a lighter
<br />Lawns shrubs, and trees ow well. Cap ility subclass colored surface layer, make u p about 35 percent. About 5
<br />IIs' gated. percent is Aquepts and Barnya rd sandy loam.
<br />2 Altvan loam, 1 to percent slop .This is a deep, These are deep, poorly d~• ained soils that formed in
<br />w drained soil on to ces at elevatio s of 4,500 to 4,90 recent alluvium. No one pedo n is typical. Commonly the
<br />f et. It farmed in o alluvium dep ited by `t$e m ' r soils have a mottled, mildly alkaline to moderately al-
<br />'vers. Included in apping aze sm areas of sai{0 at kaline loamy or clayey su~ eace layer and underlying
<br />show evidence of oor drainage. so included are all, material and are underlain b y sand or sand and gravel
<br />long and narrow teas of sand an gravel deposits. within 48 inches. In places the y have a gleyed layer in the
<br />Typically the urface layer of is Altvan soil is ayish underlying material. ~
<br />brown loam a out 10 inches t ick. The subsoil s brown Most of the acreage is sub ject to flooding. The water
<br />and light ye wish brown cl loam and sandy clay loam table is at or near the surfac early in spring and recedes
<br />about 14 in es thick. The s stratum is talc eous loamy ~
<br />to as deep as 48 inches late in fall in some years.
<br />sand abou 5 inches thick o er gravelly sand These soils are used for ran geland and wildlife habitat.
<br />Perm bility and a ailable water capacity are Some small areas have been >} eclaimed by major drainage
<br />moder e. The effective rooting depth is 0 to 40 inches. and leveling and are used for i rrigated crops.
<br />Surfs a runoff is medi ,and the erosio hazard is low. The potential native vegeta tion is dominated by alkali
<br />T s soil is used a ost entirely for rrigated crops.
<br />" sacaton, switchgrass, and we tern wheatgrass. Saltgrass,
<br />is
<br />fed to all crop commonly grow in the area, incl - sedge, rush, and allca]i b]u ~grass are also prominent.
<br />i corn, sugar be ,beans, alfalfa, mall grain, pots es, potential production ranges f m 3,000 pounds per acre in
<br />d onions. An a mple oP a suitab cropping syate is 3 favorable years to 2,000 poun ~ s in unfavorable years. As
<br />to 4 years of alfa followed b corn, corn for ilage, range condition deteriorate , the switchgrass, alkali
<br />sugar beets, s all grain, orb ns. Land ]eveli ,ditch sacaton, and western wheat ss decrease and saltgrass,
<br />lining, and i falling pipelines ay be needed f r proper sedge, and rush increase.
<br />water appli lion. Management of vegetation should be based on taking
<br />All met ods of irrigato are suitable, b furrow ir-
<br />' half and leaving half of the to annual production. Seed-
<br />rigation
<br />the most Comm n. Barnyard ma re and com- ing is difficult and costly bec use numerous tillage prac-
<br />mercial ertilizer are nee d for tap yields
<br />'
<br />'
<br />tices are required to e '
<br />inate the saltgrass sod.
<br />onmental plant
<br />s of trees d
<br />Win teaks and env western wheat
<br />Switchgcass s, alkali sacaton, tall
<br />shru commonly gro n in the area a generally ell ,
<br />wheatgrass, and tall fescue ar suitable for seeding. They
<br />sui d to this soil. Cultivation to control com eting can be seeded into a clea n, firm seedbed. Seedbed
<br />v elation should a continued fo as many y ors as Preparation usually require $ more than 1 year to
<br />ssible following looting. Trees t tare hest s ited and eliminate the saltgrass sod. A grass drill should be used.
<br />ave good survi 1 are Rocky M ntain jump ,eastern Seeding early in spring has pr ~
<br />ven most successful.
<br />redcedar, pond osa pine, Siberi elm, Russi -olive, and
<br />' especially
<br />Wetland wildlife aterfowl, utilize this unit.
<br />ed are sku bush sumac,
<br />hackberry. T shrubs best su ,
<br />The wetland plants provide n sting and protective cover,
<br />lilac, Siberia peashrub, and erican plu
<br />hi l
<br />t
<br />th
<br />b' t
<br />l
<br />t
<br />i
<br />il
<br />d
<br />h as well as some food. The earby irrigated cropland,
<br />y
<br />s
<br />a
<br />are
<br />uce
<br />o
<br />e
<br />emen
<br />s so
<br />an pro
<br />Th
<br />suitable f openland wild a including heasant, co on- where wildlife obtain much of their food and fmd protec-
<br />tail, and Darning dove. uch crops wheat, co ,and five cover, makes this unit v uablc to both wetland and
<br />alfalfa rovide suitabl habitat fo openland ' dlife, openland wildlife.
<br />espec' uy pheasant. tee and rub planti gs and Openland wildlife, especially pheasant, use this unit for
<br />and' turbed nesting over would nhance ope and wi]- cover and nesting. Deer fm excellent cover in some
<br />d ' populations.
<br />his Altvan sai has fair to good potenti for urban areas.
<br />These valuable wildlife aroar
<br />~ should be protected from
<br />nd recreational evelopment. he chief li ling soil f - fire and fenced to prevent en oachment and overuse by
<br />lures for urba developmen are the sh ' k-swell po n- livestock. They should not bed ned.
<br />'
<br />tial of the s soil as it ets and dri and the pid These soils have good poten al as a source of sand a d
<br />permeability of the sand and gravel bstratum. eptic gravel. Capability subclass VIu ~• Salt Meadow range ai
<br />tank abso ion fields f ction proper ,but in pl es the 4-Aquolls nd Aquepta t
<br />'
<br />~ }ooded. T s nearly eve!
<br />'
<br />substrata does not ontain enou fines to roperly
<br />ewage lag ons requir sealing
<br />filter t !eachate s
<br />unit is i depressions
<br />map
<br />b toms of slurs! drain ew sand alo g the
<br />ooth pl
<br />~ys thro ghoul the survey
<br />.
<br />.
<br />Lawns shrubs, and tees grow ell. Capabil' y subclass- ea. Aqu s, which ha e a d ark co red surf a layer,
<br />IIe i gated. make up bout 55 pe ent of l the nit. Aque ts, which
<br />~-Aquolls and Aquents, gravelly substratum. This have a ghter colors surface ! lay r, make about
<br />nearly level map unit is on bottom lands and flood plains percen .About 20 rcent is ~oi that are ell drain d
<br />'
<br />of all the major streams in the survey area. Aquolls, and s ils that have andstone o 98 inche of
<br />r shale with
<br />which have a dazk colored surface layer, make up about the urface.
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