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Agua Hedionda Lagoon dredging plan presented to restore inlet, replenish beaches and support desalination plant
Summary
Channelside Water Resources and Anchor QEA presented a maintenance dredging and beach nourishment plan for Agua Hedionda Lagoon: a proposed neat-line dredge to -22 mean lower low water (about 400,000 cubic yards, plus contingency), a fall-to-spring tentative schedule, and extensive permit and monitoring requirements to protect habitat and public safety.
Representatives from Anchor QEA and Channelside Water Resources briefed the Beach Preservation Commission on June 4 about a planned maintenance dredging and beach-nourishment operation for Agua Hedionda Lagoon that would support the Claude "Bud" Lewis Carlsbad Desalination Plant and restore beach sand.
"This provides approximately 10% of San Diego County's water supplies and nearly 50,000,000 gallons of drinking water each day," said Dominic Massaro of Anchor QEA, describing why maintaining an open inlet is critical to the lagoon and the desalination intake.
Presenters said the dredge design calls for excavation to approximately -22 mean lower low water with a two-foot overdredge. The neat-line bathymetry survey from February produced a dredge estimate in the neighborhood of 400,000 cubic yards; staff included an additional…
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