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<br />NATURAL ENVIRONMENT SURVEY <br /> <br />Survey Date: 9123/92 <br /> <br />Survey Location: <br />Survey Summary: <br />Basis forISF: <br /> <br />At mile marker 12 <br />7 C, clear, warm, light snow on 9/22 <br />rainbow trout fIShery <br /> <br />e <br /> <br />FIELD SURVEY <br /> <br />Survey Date: 9/22/95 <br /> <br />Method Used: R2X <br />Measured Flow (cfs): 1.92 <br />Survey Location: SE NE S22 T17S R69W 6PM <br />Notes: 500' dls ofBLM boundary below confluence wlEast Fork <br /> <br />Grassline Width (ft): 12.1 <br />PHOTOS: 3 <br /> <br />WATER AVAILABILITY <br /> <br />Method: <br /> <br />The Eightmile Creek #2 hydrograph was derived as per the USGS WRI Report 85-4086 <br />(Mountain Region).. See hydrograph below. The summer instream flow recommendation was <br />reduced to 2.0 cfs (7/15 - 10131) based on the water availability analysis. As per the Division 2 <br />Engineer, senior water rights do not present a water availability problem within this reach of <br />stream. <br /> <br />OCT NOY <br />1.2 .96 <br /> <br />MEANIMEDIAN MONTH!.. Y FLOWS cfs <br />DEC IAN FEB MAR APR MAY JUN <br />.74 .63 .65 1.0 2.5 10 18 <br /> <br />JUL <br />3.2 <br /> <br />AUG SEP <br />1.5 1.1 <br /> <br />Eightmile Creek u/s of BlM Boundary <br />SYNTHETIC HYDROGRAPH <br /> <br /> <br />5 <br /> <br />iil <br />u. 4 <br />~ <br />3: <br />o <br />...J 3 <br />u. <br />>- <br />...J <br />:I: <br />Z 2 <br />o <br />:E <br />Z <br />L1jl <br />:E <br /> <br />-- <br /> <br /> <br /> <br />---- <br /> <br /> <br />-------------- <br /> <br />o <br /> <br />OCT NOV DEC JAN FES MAR APR MAY JUN <br />MONTH <br /> <br />I - CWCS ISF AMOUNT I <br /> <br />JUL AUG SEP OCT <br /> <br />IEight_#2.Wk41 <br /> <br /> <br />C:\MARKlNEW _RECS\DIV _21l997\Div2 Roo Sum RpI B.doc <br />