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<br /> I <br /> I <br /> I <br /> I <br /> I N <br /> N <br />I OC <br />0 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br /> <br />SItE/.>' w4S!/ <br />41/LtfR:ds ,q:P/#I.e:AI"" <br />Sf .YL!N!~k (OJ 1)../ S;I?J.IS <br />to/A''''',;) JV/J~# Acres <br />&5;lltJ- J- <br /> <br />!V-ll <br />tiT' State <br /> <br />Watershed <br /> <br />Silbwatersbed <br /> <br />PSIAC <br /> <br />- <br /> <br />1968 <br /> <br />. . r" U,/l/f '(f) <br />fMs€J -/ d-Ol"'Condidon <br />lIlame 77:4/11 -t-13?-~ <br />h' ;;..6 -j' 0 <br /> <br />Date <br /> <br />I:J. <br /> <br />SEDIMENT YIELD FACTOR RATING <br /> <br />CLIMATE <br />(c) <br /> <br />SURF ACE GEOLOGY SOILS <br /> <br />(0) (b) <br /> <br />(10) ~: (10) <br />.0 Marine shales and re- a Fine textured; ..si- a. <br />lated Qludatonea and ly d.1apenedj ..Uae- <br />sllutonea alkalu.ej hi&b sluinlt- <br />Vl a.ell characteristics <br />, ~ Sine1e llfain .ilts and b. <br />fille .&Dds <br />c. <br /> <br /> (5) <br />o. Roetcs of medium <br /> hardness <br />b. Moderately weather.d <br />c. Moderately fractured <br /> <br />" <br />'T <br /> <br />.0 Med.lum textured sol1 <br />b. Occ"lon.a1 rbek fra.- <br />ments <br />e. Caliche layers <br /> <br />(0) <br /> <br />(10) <br /> <br />Storm. of several <br />day.' duration with <br />sbort period. of iD- <br />leDle rainfall <br />Frequent intenae COll~ <br />vectbe storm_ <br />Freeze-thaw occur- <br />rence <br /> <br />(5) <br /> <br />(5) <br />a) Storms of moderate .. <br />7 duraUon and inteasity <br />b.)Infrequent conveell.. b. <br />storms <br /> <br />(0) <br /> <br />Humict climate witb <br />rain!aU of low inten.. <br />sity <br />Precipitation in form <br />of Stl4)W <br />c. Arid climate, low in. <br />tensity storms <br />d. Arid eUmate; rare <br />COrl~ctive storms <br /> <br />a. Massiv_, bard forma. a. <br />tiODS <br /> <br />HiCh percemllle of a. <br />rock freements <br />b. Acll'egated clays <br />c. H1a:h in oreanie matter b. <br /> <br />FactorT <br />value I <br /> <br />() <br /> <br />Gl~OUND COvER <br /> <br />(I) <br /> <br />Ground cover does Qat ex.. <br />ceed 20'10 <br />a. Veglltation spar.e; little <br />or QC) litter <br />b. No tack ill surface soU <br />-~ . C: <br />K- ..(&'0/0 <br /> <br />Cover oat exceedinc 40'!. <br />a. Noticeable litter <br />b. tr trees presea.t UDder.. <br />story not wen deyeloped <br /> <br />v~ 15 j, IZr 0 Jit<Slo <br /> <br />(-10) <br /> <br />a. Area completely protect- <br />ed by vegetation. rock <br />{r.emeots, Utter <br />b. LitUe opportunity for <br />rainIall to reach erodible <br />material <br /> <br />Factor f. <br />value I <br /> <br />/J <br /> <br />I Subtotal (a)-<fI) <br /> <br />(Insl,"ction$ on '.lIe,se) <br /> <br />,- <br />/ <br /> <br />LAND USE <br /> <br />s- <br /> <br />RUNOFF <br />(d) <br /> <br />TOPOGRAPHY <br />(0) <br /> <br />(10) <br /> <br />a. Hqh peak nows per a. <br />unit _ea <br />b. L8I"Ie volume of Claw b. <br />pet ~t area <br /> <br />(20) <br /> <br />Ste~ upland. slopes <br />(in excess 01 3~0) <br />High relief; little or <br />no floodplain devel. <br />opment <br /> <br />(5) <br /> <br />Mocletate peak no.... <br />per nrut area <br />Moderate volume of <br />now per unit area <br /> <br />(10) <br /> <br />a. Moderate upland <br />slopes (less than 20'70) <br />b. Moderate fan or flood- <br />plain development <br /> <br />1- (0) <br />a. Low peak nows per a. <br />-unit area-- <br />b. Low volume of runoff b. <br />perWur'iRa <br />c. Rare Nooff events <br /> <br />(0) <br />GenUe upland slopes <br />(lesa than S'-o) <br />Ext~Qsive alluvial <br />plains <br /> <br />(0) <br /> <br />~ <br /> <br />(I> <br /> <br />UPLAND EROSION <br /> <br />(h) <br /> <br />(10) <br /> <br />e. More than S()i'f. cultivated <br />b. Almost all of area inten. <br />alvely crazed <br />c. AU of area recel\tly <br />burned <br /> <br />(25) <br /> <br />a. More than 50"10 of the <br />area characte~ed by rill <br />aad. cullY 01' landslide <br />erosion <br /> <br />(10) <br /> <br />(0) <br /> <br />a. Leas than 25,... cultivated <br />b. 50,;. or leas receQtly <br />~Ioued <br />c. Le.s than SO'Io iDtensive- <br />1, crazed <br />d. Ordinary road and other <br />construction <br /> <br />(10) <br /> <br />L About 25'1. of the area <br />characterized by rill and <br />cuUy or landsliele erosion <br />b. Wind. erollioo _ith depo. <br />sltioD 10 sueSIQ channels <br /> <br />(0) <br /> <br />(-10) <br /> <br />e. No cultivation <br />b. No recent lo&a:inI <br />c. Low intensity &;razlnc <br /> <br />() <br />JS <br /> <br />/) <br /> <br />Subtotal (h) - (;) '1 <br /> <br />-I- r~ <br />----i <br /> <br />j <br /> <br />CHANNEL. EROSION AND <br />SEDIMENT TRANSPORT <br />(i) <br /> <br />(25) <br /> <br />e. Eroding banks continu. <br />ously Ot at frequent in. <br />tervals 'N'ith larae depths <br />and long flow duration <br />b. Active beadcuts and de. <br />gradation in tributary <br />channel, <br /> <br />(10) <br />a. Moderate flow depths. <br />medium now duration <br />with occasionally erodine <br />bal1ks."n>eaf <br />'J&,/I <br /> <br />~~L,.Jtt.d}' tZtPut-, <br />j' (0) <br />e. Wide 'hallow chaMeIs <br />with nat a:radients and <br />short now duration <br />b. Channels in massive <br />rock. large boulders, or <br />rWefl velleuneg...> <br />c. ~ Artificially controlled <br />channels <br /> <br />."" <br />-- <br /> <br />'-- <br />ITOTAL 3LJ = .J 7 <br />RATING - L - - -. - ac.rt.!sq. mi./yr. <br />SJ}, ) Yo o. Z' :::~ <br /> <br />SHEET .-lL OF 12 <br /> <br />L <br />