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

72
Exceedances
and
Summary
Statistics
Flow (cfs) 1975–2007
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Rubicon River—Above Ralston Afterbay (842.815+815ACC)
20% 78.0 93.2 220.1 567.4 777.1 934.1 822.2 716.4 234.1 111.3 78.3 72.2
50% 65.5 67.1 97.4 193.6 290.0 447.0 392.5 195.0 122.5 75.0 56.0 54.3
80% 42.0 49.7 58.9 64.9 115.0 204.8 160.0 104.1 65.0 47.0 39.2 37.0
Average 65.6 115.3 345.3 543.6 669.8 666.0 588.3 489.1 260.5 107.5 58.2 55.6
Max 1,060.0 5,400.1 26,427.4 40,451.5 35,600.2 14,812.7 8,270.5 13,459.0 3,230.1 1,790.1 131.2 289.0
Min 11.0 14.0 20.0 25.0 23.0 31.0 22.0 28.3 17.0 9.9 8.9 9.0
Middle Fork American River—Below French Meadows Reservoir (530.802)
20% 9.9 10.0 11.0 13.0 14.0 15.6 14.0 17.0 12.0 10.0 10.0 9.9
50% 9.1 9.5 9.8 10.0 10.0 12.0 11.0 9.9 9.7 9.5 9.2 9.3
80% 7.7 7.7 8.2 8.7 8.6 9.5 9.3 8.5 7.7 7.6 7.7 7.7
Average 9.1 9.4 11.2 20.2 19.5 23.8 17.7 61.6 36.3 15.1 8.6 9.8
Max 75.0 71.0 164.0 3,280.0 993.0 2,380.0 531.0 3,430.0 690.0 521.0 11.0 152.0
Min 2.7 2.8 2.8 4.1 4.4 4.1 3.9 2.7 3.1 2.8 2.7 2.6
Middle Fork American River—Above Middle Fork Interbay (806.810+810ACC)
20% 25.5 45.6 108.8 222.8 260.5 331.2 297.4 342.4 101.7 47.4 27.5 23.0
50% 19.6 24.1 41.7 91.1 133.5 190.5 172.0 104.0 52.0 29.7 20.7 19.3
80% 15.1 18.6 24.3 28.2 51.6 105.9 93.3 53.7 30.4 19.2 14.9 13.6
Average 23.1 49.2 110.3 175.3 208.9 246.7 215.5 216.8 98.3 40.2 21.7 20.1
Max 604.6 1,071.1 2,985.4 7,801.0 5,238.7 3,231.7 1,169.0 3,604.5 953.9 575.7 53.8 117.7