| Floodplain Structure Modifications Timeline | |
| Bridges | |
| Floodplain Structures | |
Infrastructure Improvement
Floodplain Structure Modifications Timeline
The following chart illustrates the time schedule for additional floodplain structure modifications.
Bridges
One of the top priorities for the TRRP over the past several years has been 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 open to traffic, setting the stage for higher ROD flows in future years. This accomplishment is especially noteworthy in that it required extensive coordination with contractors to respond to changes in both spring and fall release schedules that impacted construction schedules and methods.
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 Brige
 |
|
| 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.
Floodplain Structures
Poker Bar Road Project
One of the next floodplain projects needed in order to release higher flows established in the Record of Decision is the relocation and/or raising of 1.1 miles of road along the Trinity River near Poker Bar. A construction contract was awarded on September 27, 2005 to Eagle Rock, Inc. of Junction City, CA. The work will begin in late October and be completed by February 2006.