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<br />NATURAL ENVIRONMENT SURVEY <br /> <br />Survey Date: 9/23/92 <br /> <br />Survey Location: <br />Survey Summary: <br />Basis for ISF: <br /> <br />At mile marker 20 <br />165 feet electroflShed. Sample included: 92 rainbow trout (6" - 24"). <br />rainbow trout fIShery <br /> <br />e <br /> <br />FIELD SURVEY <br /> <br />Survey Date: 9/22/95 <br /> <br />Method Used: R2X I Grassline Width (ft): 9.5 <br />Measured Flow (cfs): 1.09 PHOTOS: 3 <br />Survey Location: At bridge in NE SW S4 T16S R69W 6PM <br />Notes: <br /> <br />, <br /> <br />WATER AVAILABILITY <br /> <br />Method: <br /> <br />The Eightmile Creek #1 hydrograph was derived as per the USGS WRI Report 85-4086 <br />(Mountain Region). See hydrograph below. The summer and winter instream flow <br />recommendations were reduced to 1.1 cfs (7/15 - 10/14) and 0.65 cfs (10/15-313 I) based on the <br />water availability analysis. As per the Division 2 Engineer, senior water rights do not present a <br />water availability problem within this reach of stream. . . <br /> <br />MEAN MONTHLY FLOWS (cfs) . <br />OCT NOY DEC IAN FEB MAR APR MAY ruN 1UL AUG SEP <br />1.2 .96 .74 .63 .65 1.0 2.5 10. 18. 3.2 1.5 1.1 <br /> <br />Eightmile Creek u/s of East Fk Eightmile Creek <br />SYNTI-ETIC HYDROGRAPH <br /> <br /> <br />5 <br /> <br />Iii <br />u. 4 <br />~ <br />:;: <br />o <br />~ 3 <br />>- <br />...J <br />:I: <br />Iz 2 <br />o <br />::;; <br />~ 1 <br />::;; <br /> <br />---- <br /> <br /> <br />---- <br /> <br /> <br />-- <br /> <br />o <br /> <br />OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT <br />MONTH <br /> <br />1_ CWCB ISF AMOUNT I <br /> <br /> <br />I EiQht_#1.wk41 <br /> <br />C:\MARK'NEW _RECS\D1V _2\19971Div2 Reo Sum Rpt ado<: <br />