Los Vaqueros Reservoir Expansion Project

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The expansion of Los Vaqueros Reservoir is an important component of California's long-term plan to fix the San Francisco Bay/Sacramento-San Joaquin Delta (Bay-Delta) ecosystem. The expansion will protect the region's drinking water quality and reliability, reduce effects of delta water diversions on aquatic resources, and improve recreation and habitat resources in the reservoir watershed.

ESA has provided comprehensive environmental planning and compliance services for the reservoir expansion project, which would increase the existing reservoir from 100,000 acre-feet to 160,000 acre-feet. ESA led the project definition, alternatives development and screening, environmental studies, public outreach, CEQA and NEPA documentation, and permitting, all of which required extensive interagency cooperation. ESA helped Contra Costa Water District identify and evaluate over 3,000 acres of land for acquisition and enhancement to meet mitigation and permit compensation requirements for affected habitats and sensitive species. ESA is now providing construction monitoring and compliance.

ESA's thorough environmental planning, compliance, and technical expertise successfully navigated the regulatory approval and permitting process for this large-scale reservoir expansion project. Once built, the expanded reservoir will preserve the Bay-Delta ecosystem and improve water reliability.

This project received a 2013 AEP Outstanding Award in the Environmental Analysis category.

Specialized Services

  • Baseline protocol and surveys
  • California Department of Fish and Game streambed agreements
  • Clean Water Act
  • Community outreach programs
  • Compliance audits and tracking
  • Data collection and conversion
  • Design specifications and construction bid packages
  • Development feasibility (constraints/opportunities, due diligence)
  • Endangered Species Act
  • Environmental impact reports
  • Environmental impact statements
  • Environmental scoping meetings
  • Fisheries
  • Greenhouse gas inventories, mitigation, and emissions reduction
  • Habitat restoration and enhancement
  • High-quality cartographic mapping
  • Historical investigations, documentation, and plans
  • Modeling and analysis
  • National Historic Preservation Act (NHPA)
  • Native American, ethnographic, and archaeological studies
  • Paleontological surveys and studies
  • Remote sensing
  • Rivers and Harbors Act
  • Section 106 compliance and documentation
  • Special status species surveys and inventories
  • Stakeholder analysis
  • US Army Corps of Engineers
  • US Fish and Wildlife Service
  • Visual impact analyses
  • Wetland assessments
  • Wetland delineations
  • Worker education programs