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

20120723-4002 FERC PDF (Unofficial) 07/23/2012
Implement the Alternative 1 Whitewater Boating Flows in the Peaking
Reach
The Alternative 1 and staff-recommended whitewater boating flow measure,
which is consistent with that specified in Forest Service condition no. 39, is more
detailed than PCWA’s proposed whitewater boating flow measure and includes
generally higher flows. Table 5-5 shows the flows recommended for providing class IV
boating opportunities in the peaking reach, and table 5-6 shows the flows recommended
for providing class II boating on the Confluence Run (downstream of the confluence of
the Middle Fork and the North Fork American River).
Table 5-5. Staff-recommended flow schedule to support class IV boating
opportunities on the peaking reach downstream of Oxbow powerhouse
(Source: Forest Service, 2011a, as modified by staff).
Water Year
Type
Weekdays
Flow a
(cfs)
Wet 1,000 3 hours
(9 a.m.–noon)
Above
normal
Below
normal
Duration
(Time of day) June 1–Labor Day
1,000 3 hours
(9 a.m.–noon)
1,000 3 hours
(9 a.m.–noon)
Dry 1,000 3 hours
(8 a.m.–11 a.m.)
Critical 1,000 3 hours
(8 a.m.–11 a.m.)
Extremely
critical
1,000 3 hours
(8 a.m.–11 a.m.)
328
5 days per week
(M–F)
5 days per week
(M–F)
4 days per week
(T–F)
3 days per week
(T, W, F) except
for F before Labor
Day
2 days per week
(W, F) except for
Memorial Day b
1 day per week
(W)
After Labor Day–
September 30
4 days per week
(T–F)
3 days per week
(T, W, F)
3 days per week
(T, W, F)
2 days per week
(W, F)
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