South Jacoby Creek Project

Restore the Function of Secondary Channel Habitats and Seasonal Wetlands Project

Completed: 2021

Overview

  • Restored the function of secondary channel habitats and seasonal wetlands, benefiting various fish and wildlife species.
  • Created approximately 9 acres of marsh channels, ponds, and wetlands, along with a breach in Jacoby Creek's existing levee.
  • Floodplain connectivity was restored, enhancing habitat for bird and amphibian species.
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History/Location

In the late 1800s, historic diking efforts in the lower Jacoby Creek disrupted floodplain connectivity, causing the loss of the region's tidal marshes on both sides of the creek. These actions also severed access to off-channel and estuarine habitats for aquatic species. The grading of adjacent lands for agriculture further led to the loss of intricate wetlands and riparian areas, essential for migratory and resident birds, amphibians, and reptiles.

Restoration Enhancements

The primary goal was to restore the function of secondary channel habitats and seasonal wetlands, benefiting various fish and wildlife species, including Coho salmon (Oncorhynchus kisutch), Steelhead (Oncorhynchus mykiss), and Chinook salmon (Oncorhynchus tshawytscha). This project created approximately 9 acres of marsh channels, ponds, and wetlands, along with a breach in Jacoby Creek's existing levee. Additionally, it incorporated topographically diverse native planting hummocks and a low guide berm to redirect floodwater into Jacoby Creek. As a result, floodplain connectivity was restored, enhancing habitat for bird and amphibian species while providing safe off-channel habitat refugia for juvenile salmonids and other aquatic species.

Partnership and Funding

The South Jacoby Restoration and Habitat Enhancement Project was grant funded by the CA State Coastal Conservancy and included the restoration of stream channels and wetland habitat along the south side of lower Jacoby Creek.