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City staff backs advancing Lynnhaven surge barrier as Army Corps'led early actionable element
Summary
Public works recommended the Lynnhaven inlet surge barrier be advanced to 35% design so the Army Corps can produce a Class 3 cost estimate; staff said the study now totals about $13.5 million with a $6.67 million city share and warned construction would be an order of magnitude larger.
L.J. Hanson, director of public works, told the City Council that the Army Corps of Engineers has asked the city to select one "early actionable element" from the Coastal Storm Risk Management feasibility study and advance that element to 35% design so the Corps can prepare a Class 3 cost estimate. Hanson said staff and the Corps jointly recommend the Lynnhaven inlet surge barrier, a package of gates, dune enhancements and tie'in walls intended to reduce tidal inundation inland.
Hanson said the Corps'led study, originally capped at about $3 million and a three'year schedule, was revised under the Corps' "complex" process and later expanded after a headquarters request for more robust geotechnical and cost work. "That bumped the cost up to about $13,500,000," Hanson said, and he added that the city's share of the study is…
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