| OCR Text |
Show TABLE C- 5 Rock Creek Stream Flows at Upper Stillwater Dam ± J 1920- 1960 ( Unit- Cubic- feet per second) Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept Historical Without Unit 2/ Maximum Year 1921r/ Minimum Year 19341/ Maximum Daily Flow Minimum Daily Flow Average Daily Flow 62 32 24 24 27 33 50 461 1346 329 156 109 16 17 15 18 20 16 32 65 153 39 31 25 122 52 42 33 29 33 113 535 1346 346 156 123 0 8 8 11 11 7 22 65 153 39 33 25 47 32 24 23 22 23 49 386 620 191 80 57 U5 o 4> With Uniti/ , .. Maximum Year 1921- - Minimum Year 1934^-' Maximum Daily Flow . , , Minimum Daily Flow- - Average Daily Flow ill 7 4 8 7 6 5 ill 895 95 2H 13 8 8 6 8 11 9 35 70 170 44 38 29 20 10 11 11 13 11 35 70 895 102 93 86 2 4 3 4 4 6 2 2 2 2 2 2 5 7 5 8 8 8 7 6 173 39 9 17 _ 1/ The flows are the average daily flow for the month. 27 All flows estimated from historical record of Rock Creek near Hanna USGS Gage 9- 2785, South Fork of Rock Creek USGS Gage 9- 2 780 and Altitude- Area- Run- off method used by the Bureau of Reclamation. _ 3/ Year means water year ( October through September) . _ 4/ Unit flows include releases for fish, irrigation and reservoir spills. Hydrologic studies indicate the releases are necessary 92% of the time during the 41- year period of study. 5_/ Minimum flow of 2 cfs. The estimated seepage below the dam occurs randomly about 8% of the time during the 41- year period of study. 6/ The minimum release for downstream use would usually occur during water years of maximum runoff when intervening stream gains are the greatest. |
