Three Creeks Parkway Project

Summary: In July 2015, the District partnered with American Rivers, a non-profit partner, on the $2 million Three Creeks Parkway Restoration Project in Brentwood, a multi-agency public-private partnership to transform 1/4 mile of the Marsh Creek flood control channel into high quality salmon and riparian habitat, with enhanced public access. Since then, the Project has expanded to restore ¾ mile of Marsh Creek and costs approximately $9.0 million. Approximately $5.9 million of outside funding from private, federal, and state agencies has been obtained to date. The Project has multiple local and regional partners including the City of Brentwood, Friends of Marsh Creek Watershed, East Contra Costa County Habitat Conservancy, and East Bay Regional Park District. In 2018, planning and environmental studies were completed and construction is scheduled to begin in June 2020.

Project Description:

The Three Creeks Parkway Restoration Project is a multi-benefit flood control, creek restoration, and public access project. It will improve approximately 4,000 linear feet of Marsh Creek located in Brentwood, California by widening the channel with a floodplain bench and planting with native vegetation. The project limits are from the Union Pacific Railroad bridge to Dainty Avenue. When implementation is complete, the 13.5-acre project site will include 2.1 acres of frequently inundated floodplain (seasonal wetland) and 4.4 acres of woody riparian vegetation. This will provide quality habitat for Chinook Salmon and Swainson's Hawk. The project will also improve recreation and educational opportunities in this reach of Marsh Creek.

Project Goals:

  • Expand the channel to allow for floodplain and riparian habitat while minimizing the need for future long-term maintenance and satisfying the Flood Control District's flood capacity and maintenance requirements
  • Create a parkway setting that is landscaped entirely with California native plants and trees and enhance the trail-user experience to advance the goals of the East County Habitat Conservation Plan and the City of Brentwood's Parks, Trails and Recreation Master Plan and Creek Trails and Revegetation Master Plan
  • Supplement funding, streamline permitting, and accelerate implementation of Flood Control's Phase II and Phase III Marsh Creek Widening Projects by combining the adjacent project sites
  • Advance a vision that will transform the current facility into a sustainable system that works with nature, not against it, provides more recreational opportunities, improves habitat for fish and wildlife and reduces flood risk.
  • Implement a flood channel restoration project that will serve as a model to advance the Flood Control District's 50 Year Plan and the desire to implement an overall sustainable system.

Preliminary Plan

3CP_OverallConcept_WithWQBasin_10-15-18

Funding: Over $5.9 million outside funding has been obtained to date including: 

  • $496,731 from CA Natural Resources Agency River Parkways Grant Program
  • $744,404 from the CA Department of Water Resources Urban Streams Restoration Program*
  • $1 million from the adjacent developer, Pulte Homes, as a condition of approval by the City of Brentwood when it granted a permit to build more than 400 single-family homes on 77 acres adjacent to the creek.
  •  $1,376,623 from the US EPA San Francisco Bay Water Quality Improvement Fund 
  • $1,827,702 from the Sacramento San Joaquin Delta Conservancy**
  • $450,000 from the State Coastal Conservancy

* Project is financed under the State Drinking Water, Clean Water, Watershed Protection, and Flood Protection Act of 2000, administered by State of California, Department of Water Resources.

**Funding for this project has been provided in full or in part through an Agreement with the Sacramento-San Joaquin Delta Conservancy (Conservancy) pursuant to The Water Quality, Supply, and Infrastructure Improvement Act of 2014 (CWC §79707[g]). The contents of this document do not necessarily reflect the views and policies of the Conservancy, nor does mention of trade names or commercial products constitute endorsement or recommendation of use.

Partners:  Not far from downtown Brentwood, the project represents more than a decade of public and private partnership work to get to this point. This project is a partnership between American Rivers and the Flood Control District. The City of Brentwood is also a strong proponent of the project. Additional partners including the Friends of Marsh Creek Watershed, East Contra Costa County Habitat Conservancy, and East Bay Regional Park District.