Draft EIS_072312.pdf - Middle Fork American River Project ...

79
Exceedances
and Summary
Statistics
Ralston Powerhouse (810.815)
Flow (cfs) 1975–2007
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
20% 590.9 602.3 738.8 642.6 889.7 908.2 909.8 910.4 909.0 816.8 817.8 673.4
50% 55.3 437.0 322.9 284.5 441.2 572.2 451.1 577.5 582.8 590.8 607.0 479.6
80% 0.0 44.2 24.5 23.7 40.8 71.9 61.3 47.7 254.1 372.9 408.1 129.6
Average 267.1 389.5 382.9 356.1 447.0 501.3 464.0 517.8 561.7 560.2 582.7 448.2
Max 971.0 917.3 931.0 924.7 930.2 929.9 929.7 930.1 930.2 1,118.3 929.9 925.0
Min 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Oxbow Powerhouse (845.847)
20% 0.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 963.3 792.7
50% 0.0 899.8 635.9 430.8 738.4 1,000.0 1,000.0 1,000.0 750.2 764.1 728.2 424.1
80% 0.0 282.1 202.7 146.0 196.1 355.0 295.7 202.9 362.3 458.8 435.3 278.1
Average 80.8 706.1 615.6 542.0 632.9 727.3 720.4 663.4 708.7 730.6 696.3 509.2
Max 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0 1,000.0
Min 0.0 0.0 75.0 75.0 75.0 80.0 75.0 78.1 75.0 121.0 112.8 94.9
Note: No data are available for Hell Hole powerhouse.