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<br />Thestudy..each Includasl.lmilesofToiIGataC..ee>o, l..oml-225 <br />to the existing juncture of the t~o main tributaries; 6.9 miles of West <br />Toll Gate Creek, upst..eam t..om theO'lOuth; 2.5 mllesot an UMarn€d tributary <br />01 \Oe5t Toll "",to C..""k called Unnamed C"A"k In thl ~ ""porf; O.A mi Ie of <br />the Cne....y C..eek Spillway O..ain; 1Ind 4.4 miles 01 East Toll "ate C..eel:, <br />upstream trom the mouth. The Toil Gate Crook flood plain averages about <br />1300 teet ~ide I n the study ..each; the f I cod p lai nS of East and ....ost Toll <br />Gate C..eeks ..ange f..om about 1000 leet wide near the conlluence to about <br />200 leEtt ~ide at the upstre"m I i'lllts. <br />Toll Gllte Creel: and west Toll G"te C..eek have an averagech"nnel <br />slope 01 18leetpermilefrO/lllnterstllteHlghway2?5totheconfluence <br />of Unnamed C..eek; above the confluence the channel slope Increases to <br />39feetpe..mile. Thechllnnellsgene"allyslxfeetdeepand40t050 <br />teet wide. Channel banksaretyplcllllyerodedtosomeextent;thoso <br />not eroded "re =v....ed by limited weed growth. <br />Unnamed Creek has an average channel slope of 25 leet pe.. mile. <br />The channel Is I..regula.., r"nging f..om nea..ly no Channel to one about six <br />feeT deep and 20 to 30 leet wide. The flood plain ..anges in width Irom <br />~OO I.."t in I'll" low,," "each,,~ to IODQUt 200 feel in II'" upper ro~ci1e~. <br />Theave..age slope of E(lst Toll GateC..eek is 22 leetpe..mile. <br />The channel ave..agesabout six feet deep "nd 3C to 40 feet wide. This <br />st....am is hlg~ Iy erosive du..i n9 pe..iods 01 high f lows. The I lOad plai n <br />fo.. East Toll G<lte Creek ave..ages 500 to 600 teet wide. <br />Ch"nMI constrictions consist of the Inte..st(lto Hlghw3Y 225 <br />crossing on Toll Gate CreeK, the Sixth Avenue C..ossing on Toll Gate Creek, <br />the Chambe..s Road crossi ng 01 both E1Ist 1lnd wost Toll G"te C..eck, t~e <br />HinhlineC1lnal crossing on West Toll GateC..eek,andthallllfl\venue <br />c"osslngottlwChe..ryCreekSplll..ayD..ain. All other road crossings <br />a......t the tlow 11~0"ovlO"5.all and insignificant culverts. <br />Photog..aphs of Channel conditlon5 in the study reach and of <br />the Cherry C..oek f1eservol.. soill""y a..o shown on the tollo..lng pa gas. <br /> <br />- <br /> <br />- <br /> <br />I <br /> <br />I <br /> <br /> <br />~ <br />. <_..:- <br />.,:;;..~,. :.:.... .- <br /> <br /> <br /> <br />Figu.....I. <br /> <br />1969"erllllphotog..aphofjunctU"llot <br />East and West Toll GateC..eeks, looking <br />wesTerly. <br /> <br /> <br />- <br /> <br />I <br /> <br /> <br />, <br /> <br />Figure 2. 1969illl..ielphotog.."phofChe....yC..eek <br />Res""voirsplllwdy,IOOi<inrJ,,orthOldste..ly <br />toToIIGateC..eekbasln. <br /> <br />, <br />