ITEM: |
INFORMATIONAL ITEMS/STAFF REPORTS |
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24. |
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Meeting Date: |
September 17, 2007 |
Budgeted: |
N/A |
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From: |
David A. Berger, |
Program/ |
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General Manager |
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Prepared By: |
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Cost Estimate: |
N/A |
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General Counsel Approval: 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 August 2007,
CARMEL RIVER LAGOON: During
August 2007, the lagoon’s water surface elevation (WSE) dropped to 2.5 feet
before recovering slightly to approximately 3.0 feet after the Carmel Area
Wastewater District (CAWD) released approximately 2.5 acre-feet of recycled
water from their treatment plant upstream of the lagoon, beginning on August 20
(see chart below).
WSE at the
JUVENILE STEELHEAD RESCUES: Staff began
annual summer juvenile steelhead rescues on May 7, 2007. As of August 31, 2007, 11,971 juvenile
steelhead plus 16 adults have been rescued from the lower 7.5 miles of the
SLEEPY HOLLOW STEELHEAD REARING FACILITY: The first rescued fish were brought to the Facility on May 14, 2007. As of August 31, 2007, a total of 10,788 fish has been stocked in thirteen tanks and troughs at the Facility. Most of the rescued YOY fish started out quite small and represented a unique rearing challenge at the Facility. In addition, this year’s critically dry inflow conditions increased the stress level in fish rescued from drying reaches and isolated pools, and many fish were infected with one of several diseases or parasites when they arrived at the Facility. Despite ongoing prophylactic and remedial treatments, size grading, and improved rearing conditions, these small fish suffered from disease outbreaks and predation by only slightly larger fish and have a survival rate to date of only 26%. Survival rates for both the older juvenile fish and the larger YOY fish have been good at approximately 75%. Altogether, as of August 31, 2007, 3,800 fish (i.e., 3,602 YOY and 198 age 1+ juveniles) have survived, for a survival rate to date at the Facility of 35%.
U:\staff\word\boardpacket\2007\2007boardpackets\20070917\InfoReports\24\item24.doc