ITEM:
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INFORMATIONAL ITEMS/STAFF
REPORTS
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27.
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CARMEL RIVER FISHERY REPORT FOR NOVEMBER 2010
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Meeting Date:
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December 13, 2010
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Budgeted:
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N/A
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From:
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Darby Fuerst,
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Program/
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N/A
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General Manager
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Line Item No.:
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Prepared By:
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Cory Hamilton
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Cost Estimate:
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N/A
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General Counsel Review: N/A
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Committee Recommendation: N/A
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CEQA Compliance: N/A
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AQUATIC HABITAT AND FLOW
CONDITIONS: During November 2010, Carmel River
streamflow conditions for fish migration were inadequate for adults, but
marginal for smolt and juvenile passage, with continuous flow to the lagoon
throughout the entire month.
During November 2010, the mean
daily streamflow recorded at the District’s Carmel River
at Sleepy Hollow Weir gaging station averaged 16.5 cubic-feet per second (cfs) and
ranged from 14 to 23 cfs. Unimpaired
runoff at San Clemente Dam (SCD) for the month of November 2010 was 1,072
AF. Unimpaired runoff at SCD for Water
Year (WY) 2011, which starts on October 1st, has totaled 1,706 AF or
about 2.5% of the long-term annual average of 68,900 AF. During November 2010, 2.26 inches of rainfall
was recorded at California American Water’s (CAW) SCD. The rainfall total for WY 2011 is 2.88 inches,
which is 13.5% of the long-term annual average of 21.41 inches.
CARMEL RIVER LAGOON: During November 2010, the lagoon’s water-surface
elevation (WSE) ranged from approximately 6.54 to 8.89 feet above mean sea
level (see graph below). The Monterey County Public Works crews breached
the lagoon sandbar on November 24, 2010, and closed the sandbar on November 26,
2010, after lowering the WSE approximately 2 ft. The November 24th opening was in
anticipation of a predicted storm; the storm never materialized and the lagoon
was then reclosed on November 26th. Water
quality was sampled on November 8, 2010.
Data from this sampling show that the salinity and dissolved oxygen
measurements were adequate for steelhead rearing down to approximately one (1)
meter of depth. Below 1 meter of depth the dissolved oxygen gradually decreased
to suboptimal conditions for steelhead. There is a halocline at approximately 1
meter depth, where salinity increases from 10 parts per thousand (ppt) to 24
ppt, which is stressful for juvenile fish but acceptable for smolts and adults. Water temperature ranged from 56 to 64
degrees Fahrenheit (ºF) throughout the vertical column, and is considered
adequate for all life stages of steelhead.
District staff, assisted by
volunteers from the California Department of Parks and Recreation, Monterey County Water Resources Agency, California
State University Monterey
Bay, Carmel River Steelhead Association and Carmel River Watershed Conservancy,
hauled a beach seine through various sites in the Carmel River Lagoon in order
to estimate the steelhead population residing in the lagoon. Only nine
fish were captured; eight juvenile smolt-sized fish and one adult female
kelt. A Petersen Population Estimate for the whole lagoon will be computed
from these sample numbers and included in the Fishery Report for December 2010
next month.
SLEEPY HOLLOW STEELHEAD REARING
FACILITY: Staff started releases on November 1, 2010, and finished
on November 8, 2010. A total of 1,957
fish were stocked at the Sleepy Hollow Steelhead Rearing Facility (SHSRF)
during the 2010 Rescue Season. Staff
released 1,684 fish; 447 were released into the Carmel River Lagoon (estimated fish
length of 7 inches and larger), and 1,237 were stocked in the lower river, from
approximately river mile 4.5 to 3.5 (estimated fish length less than 7 inches).
A total of 107 (5.5%) mortalities were observed and 166 (8.5%) fish were
unaccounted for. The survival rate at
SHSRF for the season was 86% (1,684 released).