Habitat & Wetland Restoration

Marin-Sonoma Narrows Tolay Creek Mitigation Project | Marin and Sonoma Counties, California

Project Site
Caltrans District 4
Project Description:
Caltrans developed the U.S. 101 Marin-Sonoma Narrows HOV Widening Project Final Mitigation and Monitoring Plan (MMP), finalized in January 2013, to mitigate impacts incurred to jurisdictional waters of the U.S. and State as a result of construction of Phase 1 of the Marin-Sonoma Narrows (MSN) High Occupancy Vehicle Widening Project. One of several compensatory mitigation components, per requirements conditioned by the RWQCB Water Quality Certifications (WQC), consists of mitigation projects at Tolay Creek Ranch located in the hills south of the City of Sonoma and near the northernmost end of San Pablo Bay.

WRECO performed site visits to document the MMP and environmental permit compliance during the construction of the Tolay Creek Grade Control Project on Tolay Creek Ranch. The project site was split into two reaches: an upper reach and a lower reach.

WRECO's biologists were service-approved to perform on-site surveys and monitoring for California red-legged frog, as well as compliance for best management practices (BMPs) and erosion control.

WRECO prepared daily monitoring reports and a post-construction report for the client.

Key Tasks:
Environmental Permit Compliance, On-site Surveys and Monitoring, and Daily Monitoring and Post-construction Reports
Project Site
To request more information regarding WRECO's habitat and wetland restoration projects, email us at marketing@wreco.com.

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