Specification No. 24-11 (C51672), Tisdale Weir Rehabilitation and Fish Passage Project, Sacramento River

Background
The Tisdale Weir Rehabilitation and Fish Passage Project is issued by the California Natural Resources Agency, Department of Water Resources.

The project aims to rehabilitate the Tisdale Weir, establish fish passage, and implement site improvements to enhance flood management and ecological functions along the Sacramento River in Sutter County, California.

Work Details
The project includes the following principal features:
1. Demolish existing north abutment, notch structure portion of the weir, south abutment, and energy dissipation basin.
2. Construct concrete abutments and retaining walls.
3. Install helical piles to support the new energy dissipation basin.
4. Construct energy dissipation basin concrete slab and fish collection basin.
5. Repair and grout existing cracks of concrete weir surface.
6. Construct pile foundations of gate structure and walls.
7. Construct fish passage notch structure with a bottom hinged gate.
8. Excavate and construct concrete connection channel between the Sacramento River and the gated notch structure.
9. Place rock slope protection and structural grouting of rock slope protection.
10. Construct concrete maintenance road for access to connection channel and equipment pad.
11. Construct Control Building with security fencing and gates, install water tank for fire suppression, paved asphalt road for access, electrical, mechanical, communications, and controls systems.

Period of Performance
The contract will be performed over an estimated duration that aligns with project completion timelines as specified in the bid documents.

Place of Performance
The work will be performed at Tisdale Weir along the Sacramento River in Sutter County, California.