Laserfiche WebLink
~• • r.. ~ ::::_.:..~t~.e.w4:~:..~.._:u_u._:~.~-r-~~s~i~l~~ar':~:._..:'a..~... ......'~:-tic... <br /> <br />lu <br />4/c:? <br />54--I_'.;!;cY~c I erg-Roc!; outcrop corn;, I c::, ^~ to ;sp pcrccr~t s ! opc:. Th i s <br />nrap uri i t i ~ can vary steep rnounta i ns i des ar~d canyr.~ns i pies. The native <br />ve~ctatior~ is mzinly fir. ~IevaLiur~ is T,`vUU tr. 9,UUU feet. The <br />average annual precipitation is 14 to !d inches, the average annual <br />air tcrnpcrzturc is 40 to 4.1. degrees ~, and the average frost-free <br />period is M15 to 7U days. <br />This ur, i t i s about 45 pcrcrnt Lal:c!,c I cn so i I ar,d abou'i. ?~ pcrcer~t <br />Roc:: outcrop. The Lao:ahe!en soil is on si+ie s!c~pes and Rack outcrop <br />is mainly on upper side slopes ar,d ridges. <br />Ir.c!ude~i in this unit is about lU percent doep r'uldcr221; very <br />gravel ; y sandy I oarn r,ri f oc~t s ! u;acs ar~d a! ony dra i r~agcw~.y~~. P„ sc. <br />included is about SU percent siia!low ~lotmore vary yravef!y sandy learn <br />ors ridges and short suutf~-facing side s!c~pes. Srnz! I area:; of talus <br />are below cliffs consisting of bedrocV:. <br />TF~c Lzl;eFic I en so i I i s modcratc ly dce;.~ ar~d we I 1 drained. It forrncd <br />in colluviurn and r2siduuin ~leriv:d rlorr,inantly from gneiss and yrartite. <br />Slope is ~5 to 7U pcrcer~t. Typical ly, tl,c su;-face is covered w:tF, a <br />root of undocornposad fir litter about 1 inch thic4; over eiecompused fir <br />litter about 2 inches tl~ic!:. The surface layer is pale brown very <br />gravelly fiire sandy !aa~n about 5 inches thicl: over light browr, <br />e>ar'erncly gravelly sandy loam ahou'i, lU inches thic!c. The suhsr,il is <br />e:;treme!y gravel fy loarrt about E incites tt,ic;;. Fractured gneiss is at <br />a depth of 23 inches. The soil is neutral to a dept!-, of 5 inches, <br />slightly acid tr. a depth cif 15 inche>, an~i neutral below that depth. <br />The texture of t!ie surfz~e layer ire some a:-czs is very storey sandy <br />I oa,n. <br />Pcrmcab i l l ty of tl~c La!:ChC I erg soil i s modcratc. Ava i t ate l e water' <br />capacity is very !ow. Effective ;-Doting ,lepth is U to ~U inches. <br />Runoff i r. very ray i d, ar~d tY~c hiazzrd of wa'i:er ero~ i urn i s very I-~ i gh. <br />Rc~c4: outcrop i s rna i r~ ! y •~.`ic~rt cliffs, ! e~:gc;, and crags consisting <br />cif gneiss or grani'ae. Cliffs arc about 2U to 75 feet high. 8!opc i~ <br />15 to SO percer'~t where r~c~t vertical. <br />This unit i:, used fur waterst~cd, wildlife !',ahitat, and recrcatior,. <br />The potential plant cornrnunity is rnairi!y Douglas-fir and some white <br />fir with an unders'iory of common juniper, l~inni!,innic!:, and Gregon- <br />grape. TI-,e potential production of native und~rstory vegetation in <br />normal years is at~ou't SOU pounds per acre. <br />The Lakehslen soil i3 suited to the pro~iuctian of Douglas fir. <br />The stcc~+.^iC~L L+f slut,c I emits the kinds of equiF~rncnt that czn be used <br />i n forest manag:~ner~t. The site i r~~ie;; for Doug! as-fir i s about 50. <br />K~ust of this uni~ is in scenic Fhantc~rn Canyon. S1opc limits the <br />us: of areas of tili~ unit rnair.!y to a few paths and t:-ails, which <br />should a:;tcr~d across t!~c s I c~-..c. <br />This unit is poorly suited 'to torn:site development. TI-~e main <br />l imitations arc stcc;+ncss of slope and frcqucr~t outcro;~; of bedre~cl:. <br />This rnap unit is in capability subclass VIIs, r,Gr,irrigated. It is <br />in ttic Douglas-fir woodland site. <br /> <br />