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•' AW <br />1?..^ <br />« <br />SovMbtr U, 1977 <br />., -i'l <br />Citjr of Orona <br />9.0. Bor. 66 <br />Ccyatal Bay, Mioaaaota 55323 <br />Attn: Nr. Bansy F. Muhidi <br />Ba: Prollnlnary Flat Bavlav <br />Orona Oak <br />abaorption ayatan In thia aeil obvioualy woald not allow tha ■inlnun roeoaMnda6 <br />aaparatlon. lha noond ayatan la doalgnad for aoila with pariodlc hlfh watar <br />tablaa. Bowawar, tha watar tabla naat not ba hi^r than 2 faat balow tha aur* <br />faea for tha noond ayatan to funetion affactiwoly. Inatallation of anr aoll <br />abaorwtion aratan an thia anil ia not racoManJad. Tha Glaneo and Banal aoila <br />am Aown in aolid blua on tha aneloaad aoil nap. <br />tnti\ Mii^ - Tha naainun halght of tha aaaaanal watar <br />tahla in thia aoil aa indicatad by th.: praaanca of nottlaa ia uaually batwaan <br />1 and 3 faat. If nottlina oeeura at laaa than a 2 foot daath. inatallation of <br />fpr aoil abaomtion aratan ia not raconnandad. Thaaa aoila am riiown aa a blua <br />eroaa-hatch on tha aneloacd aoil nap. <br />f|pi^ • Baa a hi^ clay contant in tha aubaoil, whioh oftan maolta <br />in pareolation rataa in axeaaa of 60 nlnuma par inch. For thia maaon, it <br />ia meonnandad that an inaovatira nound ayatan ba inatallad on tham aoila. <br />Hound aratana cannot ba inatallad on aloaaa amatar than 6 aarcant. Tha Brin <br />aoila with alopaa frcn 6X to 12X am Nioan on tha aneloaad aoil nap aa a rod <br />croaa«hatch. lha Irln aoila with alopaa fron 121 to 18& and fron IBX to 3SX <br />am ahown aa aolid rad. <br />Baaad on tha Bannapin County prallninacy aoila roport, thorn am najor amaa <br />of tha propoaad plat wham m typo of aoil abaorption ayatan ia raowniidad <br />and najor amaa of tha plat whora tham would ba aarioua diffieulqr with aoil <br />abaorption ayatana dua to watar tabla, aoil typo and alopa. <br />A plan haa boon praparad for tha propoaad plat outlining tha najor ataap alopaa. <br />Bamal maidantial dawalopnant can ganorally bo acconplidwd on alo^a up to <br />approninataly 12X without axtra ordinary problana. FTon 12X alopa up to about <br />m alopaa, wary apocial daaign conaidamtiona nuat ba inoorporatad into tha <br />dawalopnant to prawant mrioua aroaion problana. Bo dawalofnant ia mcoan <br />on alo^a gmator tiMa IBX. <br />Vhan both tha adwaraa aoila and tha ataap alopaa aro ovarlaid on <br />plat, tham appdar to ba wary faw amaa laft for ouitabla maidantial building <br />and mptie ta^drainfiald placanant. It ia meonnandad that tha propoaad plat <br />UdL ba approvod until tha City of Orono can ba aaaurad that an adaguata and <br />aeeaptabla iadiwidual aowar ayatan can ba providad for aaeh lot to ba plattad. <br />It naat ba undorataad that tha Bannapin County aoila mpect ia a pmlininary <br />awaluation, but tha mport auggaata that tha nagnituda of aoil problana mla- <br />tiwa to ground abaocptien ayatana ia aarioua aoou^ to raquimd additional ia* <br />fomation prior to any furthor eonaidaratioa. <br />rago 2.