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

20120723-4002 FERC PDF (Unofficial) 07/23/2012
Water
Year Type
Below
normal
Flow a
(cfs)
Duration
(Time of day)
800 4 hours
(4 a.m.–8 a.m.)
1,000 3 hours
(4 a.m.–7 a.m.)
Dry 1,000 3 hours
(4 a.m.–7 a.m.)
Critical 1,000 3 hours
(4 a.m.–7 a.m.)
Extremely
critical
1,000 3 hours
(4 a.m.–7 a.m.)
Weekdays Weekends
Memorial
Day–Labor
Day
240
Saturday
before
Memorial
Day–June
30
-- 2
Saturdays
per month
-- Western
States 100
date
Memorial
Day and F
before
Labor Day
Memorial
Day
Western
States 100
date
Western
States 100
date
-- Western
States 100
date
July 1–
Labor
Day
2
Saturdays
per
month
Tevis
Cup date
1 Sunday
in July
and Tevis
Cup date
1 Sunday
in July
and Tevis
Cup date
Tevis
Cup date
After Labor
Day–Sept 30
1 Saturday
per month
a
As measured below the confluence of Middle and North Forks of the American River
(USGS gage no. 11433300).
Our Analysis
Although PCWA does not provide recreation-specific flow schedules in the
bypassed reaches, its proposed instream flows, described in section 3.3.2.2, Aquatic
Resources, would maintain or enhance existing boating opportunities in the bypassed
reaches. PCWA’s proposed instream flows for the Rubicon River between Ellicott
Bridge and Ralston afterbay would increase boating opportunities in the lower range of
suitable boating flows (400–1,500 cfs) during above normal and wet water years
compared to the existing condition; boating opportunities are not currently available
during the drier years, and PCWA’s proposal would not change this condition. PCWA’s
proposed instream flows for Long Canyon Creek would increase boating opportunities
during wet water year types compared to existing conditions. Although PCWA’s
instream flows would result in fewer boating opportunities on this reach during below
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