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• '' ~ 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. <br />