ITEM: |
INFORMATIONAL
ITEMS/STAFF REPORTS |
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22. |
CARMEL RIVER FISHERY REPORT FOR NOVEMBER
2016 |
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Meeting Date: |
December 12, 2016 |
Budgeted: |
N/A |
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From: |
David J. Stoldt, |
Program/ |
N/A |
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General Manager |
Line Item No.: |
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Prepared By: |
Kevan Urquhart & Cory
Hamilton |
Cost Estimate: |
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: November flow conditions in the lower Carmel
River were poor for migration but good for rearing for all steelhead life
stages. Rearing conditions in the upper watershed were also good. The river’s “wetted front” has advanced
significantly downstream to just above Via Mallorca Road (River Mile ~3.3),
though the U. S. Geological Survey’s Near Carmel gage remains at zero flow.
Mean daily streamflow at the Sleepy Hollow Weir ranged from 10 to 24
cubic feet-per-second (cfs) (monthly mean 13.9 cfs) resulting in 827
acre-feet (AF) of runoff, while Highway 1 remained dry.
Four small storms in November
brought 2.04 inches of rainfall as recorded at Cal-Am’s San Clemente gauge.
The rainfall total for WY 2017 (which started on October 1, 2016) is 4.04
inches, or 141% of the long-term year-to-date average of 1.45 inches.
CARMEL RIVER
LAGOON: November water
surface elevations (WSE) remained relatively level at approximately 8.5 feet
above mean-sea-level (NAVD 1988 datum), as there was no surface inflow to the
lagoon during this period.
Water-quality profiles
were conducted on November 1 at five lagoon sites. Water conditions in the main
body, north, and lower south arms were generally “fair” for steelhead rearing
in the upper 1-meter of the water column, but “poor” in the deeper areas due to
high salinity and low dissolved oxygen (DO) levels. Lagoon water temperatures
ranged from 62-66 degrees Fahrenheit, DO from 1-7 mg/L, while salinity levels
were between 6-25 parts per thousand (ppt).
Our next survey is planned for December 6th.
SLEEPY HOLLOW STEELHEAD
REARING FACILITY: The first rescued
fish were brought to the Facility on June 13, 2016. On August 24th,
District and National Marine Fisheries Service (NMFS) staff PIT tagged
(Passive Integrated Transponder) and transferred 361 fish from holding tanks to
the rearing channel. PIT tagged fish are individually numbered and can be
tracked as they migrate past fixed electrical arrays placed in the river. An
additional 15 fish were tagged on September 19 and placed in the rearing
channel September 22.
On October 22, as part
of the new Sleepy Hollow Bridge project, Granite Construction removed the
diversion dam and pipeline located approximately 200 meters upstream of the
Facility’s intake screen and pumps. This
caused a huge jump in turbidly levels in the river. Staff turned off the intake
pumps for as long as possible but had to turn them back on later in the
afternoon, causing a turbidity level spike in the rearing channel. The river
channel cleared up by approximately 5 pm and was fairly clear by the following
morning but four fish at the head of the channel jumped out overnight and died.
Releases of
rescue-reared steelhead juveniles began on Monday, November 28 and continued
through Friday, December 2. All fish
were released below the Narrows into the lower river where they originated. Final tallies of the releases will be
provided in next month’s report.
LOW FLOW SEASON STREAMFLOW MANAGEMENT: Los Padres Reservoir (LPR) had greater than
expected inflows in October and November, which resulted in 556.3 AF more storage
than planned for in the Cal-Am/CDFW/MPWMD Low Flow MOA at the end of November. As a result, the interagency managers took a
conservative risk to increase river flows out of LPR by 4.2 cfs (54%) in small
steps beginning on November 10 and continuing through November 29. If storage in LPR continues to accrue at
greater than expected rates, the managers will consider an additional flow
increase in December.
COOPERATIVE STUDIES WITH NMFS-SWFSC: MPWMD
staff helped federal project lead persons install the second of three proposed
PIT reading arrays in the river. The
initial array was a double-loop array very low in the river. This second array uses a vertical-loop array
in a series farther upstream, which we hope will withstand high flows and
debris loading better, and also detect more tags than the original one. The last array is proposed for the upper
river at the new Sleepy Hollow Ford Bridge, but may not get installed this
year. NMFS is PIT tagging fish at their
own study sites, as well as MPWMD’s fall population monitoring sites, and MPWMD
intends to tag up to 2,000 of the rescue-reared steelhead released each
year. It is hoped that detection of
these tags at the three arrays, as well as during annual population surveys or
fish rescues, will provide enough data to develop a model of juvenile fish
survival in the watershed, and estimate the contribution of rescue-reared fish
to the annual adult spawning run.
U:\staff\Boardpacket\2016\20161212\InfoItems\22\Item-22.docx