The TRRP, Bureau of Reclamation and Bureau of Land Management (federal co-lead agencies), and the North Coast Regional Water Quality Control Board (Regional Water Board – state lead agency) are constructing the Chapman Ranch Phase A project in 2019. The purpose of the project is to increase salmon and steelhead habitat downstream of Lewiston Dam. The project is designed to enhance both terrestrial and aquatic habitat quality. In-river work will increase habitat complexity via construction of slow water refuge habitats (e.g., side channels), re-connecting the river with its floodplains, and placement of in-river geomorphic and habitat features (e.g., rock and wood structures). On-shore work will include revegetation of riparian and upland areas with native vegetation.
- Signed Finding of No Significant Impact (FONSI) (pdf)
- Final Environmental Assessment / Initial Study (EA/IS) (pdf)
- Chapman Ranch Phase A Proposed Activities Map (pdf)
- Forecast changes to Federal Emergency Management Agency (FEMA) Base Flood Elevations (BFEs) based on hydraulic modeling of the project design. No structures are expected to be impacted as a result of changes to the river by the Chapman Ranch Phase A project.
- Notification from Trinity County on proposed changes for properties (pdf)
- Exhibit A: Proposed project design with approximate parcel boundaries (pdf)
- Exhibit B: Chapman Ranch Phase A Existing Conditions – FEMA Flood Hazard Zones with Forecast Rise or Fall (pdf) This map depicts current FEMA Flood Hazard Zones and Cross Sections where Future Flood Elevations are Forecast
- Public Notice from Trinity County on proposed changes
- Aerial photography: , , ,  (other years are available – note controls at bottom of screen)
- Search TRRP online library for “Chapman Ranch”