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Arroyo las Positas Diversion Project (R5-3)

Project URL link
Sponsoring Agency Zone 7 Water Agency
Subregions ('East Bay',)
Counties Alameda
Watershed Tributary Alameda Creek Watershed
Public or private land? ('Public',)
Location (lat/lon) 37.693913, -121.837800
Start Date Already in progress
End Date Depends on available grant funding
Location Description Arroyo las Positas, Chain of Lakes, Livermore-Amador Valley
Arroyo las Positas Diversion Project (R5-3)

This project will coordinate land use development with the City of Livermore near the confluence of the City's golf course and Arroyo Las Positas to allow the ability to direct overland flood flows into the Chain of Lakes.  This project will also widen Arroyo las Positas through the Golf Course.  Widening will include, but not limited to the following: sediment removal, construction of sediment basin, and revegetation with native riparian habitat.  As mitigation approximately 9 acres of wetlands will also be created.

Depends on available grant funding
Drinking Water Supply
Water Quality Improvement
Water Reuse/Recycling
Stormwater Improvements
Groundwater Benefits
Habitat Protection and Restoration
Flood Protection
This is a key project required to providing regional flood protection storage, and includes managing flood flows so that they are routed into the Chain of Lakes without in-stream diversion structures. This project also includes aspects that will enhance and protect existing habitat.
Coordination with the City of Livermore, and local property owners.
Yes, depending on availability of grant funding.
Conjunctive use, Environmental and habitat protection and improvement, Flood management, Wetlands enhancement and creation
Flood Protection & Stormwater Management

Part 2 - Detail

Stream Management Master Plan

Stream Management Master Plan, 2006.

Livermore Valley Groundwater Basin, Chain of Lakes (former or active gravel quarry pits)

The project is needed to provide regional flood protection, and protect or enhance existing habitat.

a. Conveys flood flows into the Chain of Lakes

b. Reduces sediment accumulation

c. Provides opportunities for habitat restoration and protection

Increases Water Supply Reliability
Advances/ Expands Conjunctive Management of Multiple Water Supply Sources
Increases Water Use and/or Reuse Efficiency
Provides Additional Water Supply
Promotes Water Quality Protection
Reduces Water Demand
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Addresses Sea Level Rise
Addresses other Anticipated Climate Change Impact (e.g. through water management system modifications)
Improves Flood Control (e.g. through wetlands restoration, management, protection)
Promotes Habitat Protection
Establishes Migration Corridors
Re-establishes River-Floodplain Hydrologic Continuity
Re-introduces Anadromous Fish Populations to Upper Watersheds
Enhances and Protects Upper Watershed Forests and Meadow Systems
Other (Please Describe)
Increases Water Use Efficiency or Promotes Energy-Efficient Water Demand Reduction
Improves Water System Energy Efficiency
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Promotes Use of Renewable Energy Sources
Contributes to Carbon Sequestration (e.g. through vegetation growth)
Other (Please Describe)
(low) - (high)
Drought Preparedness
Use and Reuse Water More Efficiently
Climate Change Response Actions (Adaptation to Climate Change, Reduction of Greenhouse Gas Emissions, Reduce Energy Consumption)
Expand Environmental Stewardship
Practice Integrated Flood Management
Protect Surface and Groundwater Quality
Improve Tribal Water and Natural Resources
Ensure Equitable Distribution of Benefits
Reduce Reliance on the Bay-Delta
Reduce Water Demand
Improved Operational Efficiency and Transfers
Increase Water Supply
Improve Water Quality
Improve Flood Management
Practice Resources Stewardship
Other Strategies (Please Describe)
Groundwater Management Plan
Urban Water Management Plan
Water Meter Requirements
Groundwater Monitoring Requirements
AB 1420 Compliance
BMP Compliance
CEQA Compliance
Water supply reliability, water conservation and water use efficiency
Stormwater capture, storage, clean-up, treatment, and management
Removal of invasive non-native species, the creation and enhancement of wetlands, and the acquisition, protection, and restoration of open space and watershed lands
Non-point source pollution reduction, management and monitoring
Groundwater recharge and management projects
Contaminant and salt removal through reclamation, desalting, and other treatment technologies and conveyance of reclaimed water for distribution to users
Water banking, exchange, reclamation and improvement of water quality
Planning and implementation of multipurpose flood management programs
Watershed protection and management
Drinking water treatment and distribution
Ecosystem and fisheries restoration and protection
Reduced Reliance on the Bay-Delta
Projects that directly address a critical water quality or supply issue in a DAC
Urban water suppliers implementing certain BMPs as on page 17 of Guidelines
Be designed to manage stormwater runoff to reduce flood damage (PRC §5096.827)
Be consistent with the applicable Regional Water Quality Control Plans (Basin Plans) (PRC §5096.827)
Not be a part of the State Plan of Flood Control (SPFC) (PRC §5096.827)

Project team

Part 3 - Benefits