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Army Corps' 10% Stone Lock design aims for 200-year flood protection; $21 million estimate
Summary
Army Corps contractor presented a draft 10% design for Stone Lock that would add a reinforced concrete closure, fish passage, and deep foundations; estimated cost $21 million, with geotechnical borings and schedule constraints ahead.
The Army Corps’ draft 10% design for a permanent closure at Stone Lock would add a reinforced concrete closure structure just west of the eastern sector gates, provide 200-year flood protection for the adjacent reach and include fish-passage features, a pedestrian/maintenance bridge function, and levee tie-ins, presenters told the West Sacramento Area Flood Control Agency on Feb. 19.
Andrew, the contractor presenter, said the existing Stone Lock — built in 1961 and decommissioned in 2000 — is “leaky” and no longer provides 200-year protection. The draft design would roll in the sector gates, remove stop logs, and install a reinforced concrete barrier that also carries pedestrian and emergency vehicle access. The…
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