North Bay Aqueduct Alternate Intake Project Image

To improve water quality and delivery reliability of the State of California's Water Project (SWP) to its North Bay Aqueduct contractors—Solano County Water Agency and the Napa County Flood Control and Water Conservation District—the California Department of Water Resources (DWR) is proposing to construct and operate an alternative intake on the Sacramento River, mostly located in rural portions of Solano and Yolo Counties and connecting to their existing North Bay Aqueduct system pipeline.

ESA is leading the evaluation and screening of potential sites for the new alternate intake and pipeline. ESA is also researching landside site alternatives along the Sacramento River, dense with biological resources, sensitive species, and agricultural uses. Alternatives to integrate these facilities into the intake and/or conveyance facilities being proposed under the Bay Delta Conservation Plan are also being considered. ESA is preparing a comprehensive EIR on the proposed facilities and operations and coordinating permitting efforts with several state and federal agencies.

ESA's rigorous scientific analysis and collaboration with the DWR project team is supporting project implementation in compliance with environmental regulations to meet the State of California's water supply delivery goals.

Specialized Services

  • Air quality assessments
  • Baseline protocol and surveys
  • California Department of Fish and Game streambed agreements
  • Clean Water Act
  • Community outreach programs
  • Development feasibility (constraints/opportunities, due diligence)
  • Endangered Species Act
  • Environmental impact reports
  • Environmental scoping meetings
  • Fish passage design
  • Fisheries
  • Historical investigations, documentation, and plans
  • Hydrologic and hydraulic modeling
  • Modeling and analysis
  • National Historic Preservation Act (NHPA)
  • Native American, ethnographic, and archaeological studies
  • Project website; social media management and communication materials development
  • Real-time data collection systems
  • Sea level rise adaptation studies and vulnerability assessments
  • Special status species surveys and inventories
  • US Army Corps of Engineers
  • US Fish and Wildlife Service
  • Visual impact analyses