Alamo Food Control Channel at Dally Road Bridge

Alamo Food Control Channel at Dally Road Bridge

The New Alamo Channel is part of the Ulatis Flood Control Project (UFCP). The Project was originally constructed circa 1960's by the US Soil Conservation Service and then dedicated to the Solano County Water Agency (SCWA) as the local sponsor to operate and maintain in perpetuity. The re-alignment of the original channel affected many County road crossings. Solano County maintains the bridge structure, whereas SCWA is responsible for maintenance of the channel around and under the bridges per the established easements. The Dally Road Bridge No. 23C-206 was constructed across New Alamo Channel in 1966. In recent years, the UCFP system has exhibited signs of accelerated scour and degradation of the channel bed throughout the entire system. Systematic losses of 1-2 feet of channel bed during the December 2005 storm along have been observed. Additional loss of channel bed material around the spread footings could ultimately undermine the structures foundation and jeopardize the structural stability of the bridge. The County has requested the SCWA remediate the bed scour to protect the bridge. The Project is proposed to be implemented in the Fall, at the end of the agriculture irrigation season after October 15 and before the onset of significant storm events, when channel flows are negligible. Approximately 350 cubic yards of clean rock will be used to complete the project. The length of project impacts is approximately 100 linear feet. Implementation of the Project is anticipated to be no longer than 3 days and cost approximately $40,000.

Solano