Document Actions
Arroyo las Positas Diversion Project (R5-3)
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| Web | link |
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| Progress | proposed |
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| Location Description | Arroyo las Positas, Chain of Lakes, Livermore-Amador Valley |
This project will consturct an Arroyo las Positas Diversion channel to divert flood flows to Lake G and Cope Lake in the Chain of Lakes. This project will also widen Arroyo las Positas through the Golf Course and downstream of the diversion. Widening will include, but not limited to the following: sediment removal, construction of sediment basin, and revegetation. As mitigation approximately 9 acres of wetlands will be created.
Alleviate capacity deficiency at Arroyo las Positas through Las Positas Golf Course and downstream of the diversion structure to protect adjacent property from potential flooding. The existing capacity at Las Positas Golf Course is approximately 1,800 cfs and will be improved to accommodate the estimated design flow udner projected buildout conditions of approximately 10,100 cfs. The reach downstream of the Golf Course will aslo be widened by terracing, to convey approximately 3,7000 cfs. Provide detention storage at Chain of Lakes as part of a regional flood protection solution fo the Livermore-Amador Valley.
Channels,
Diversion,
Sediment Basin,
Flood Protection,
Sediment Removal
Conjunctive use,
Environmental and habitat protection and improvement,
Flood management,
Wetlands enhancement and creation
Flood Protection & Stormwater Management
