Infrastructure Improvements

One of the top priorities for the TRRP over the first several years was the improvement of infrastructure along the river in order to accommodate the restoration flow releases prescribed in the Record of Decision. These included bridges and floodplain structures such as buildings and wells.

Bridges

A top priorities for the TRRP was the modification of four bridges on the upper Trinity River in order to physically pass the higher peak flows envisioned by the December 2000 Record of Decision (ROD) (going from 6,000 cfs up to 11,000 cfs plus tributary flows). Using the hydrologic studies, engineering designs and specifications, and environmental documents completed in FY03, the TRRP staff awarded two construction contracts totaling $6 million (both at or under engineer’s estimates). Cost-share funds of $2 million were acquired from the State to assist with these projects. All four bridges are were completed by 2006, setting the stage for higher ROD flows in future years.

Biggers Road Bridge

Old bridge

Old bridge - high flows

Construction of left side abutment

Installing decking

New bridge

Poker Bar Bridge

Old bridge deck

Old bridge structure

Construction

New bridge

Salt Flat Bridge

Old bridge

Construction

New bridge

National Environmental Policy Act (NEPA) documents for these projects are available at the Trinity River Restoration Program Office in Weaverville, CA, at 530-623-1800.