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December
26, 2005 through February 24, 2006
Weir Update:
From mid-December through February, the weir was inundated due
to high flows (377 – 6,465 cfs) resulting from New Melones flood
control releases. Recently, flows at Goodwin Dam (GDW) were
reduced to 350 cfs for a short, two-day period (February 23–
25). During this brief flow reduction, SPC&A technicians were
able to access and remove the weir in its entirety. Most of the
weir components were recovered in good condition and should be
reusable next season.
Over the next few months, preliminary weir data will be checked
for errors, summarized, and analyzed. As in previous years, a
data report will be developed and posted to the website.
Although the weir was inoperable during the last part of the
monitoring season, we expect a minimal number of Chinook would
have passed the site from late December through mid-February
based on past years’ data.
Figure 1.
Photos from left to right beginning from the top:
Flow at 2,500 cfs (GDW) during beginning of flood
control releases; Vaki computer lockbox at 5,000 cfs; solar
panels (which were on a 20 foot pole) at 7,000 cfs; CDFG weather
station at the weir site at 7,000 cfs; north bank rigid weir at
1,800 cfs after high flows were reduced at GDW; upstream livebox
during weir removal at 350 cfs; Weir removal on February 23rd;
weir removal on February 23rd looking across the weir
from the work area on the north bank. |
