Sequoia was awarded the contract to rehabilitate a 4,000 foot long National Resource Conservation Service (NRCS) flood control dam in Central Texas. The dam is part of a series of flood control dams in the region designed to hold floods and prevent them from aggregating downstream.
Sequoia began the project by constructing a cofferdam upstream of the existing dam to protect the work from any rain events during construction. The dam featured excavation of 140,000 cubic yards of onsite soil to install a new principal spillway pipe and inlet /outlet control structures. Key to the construction was the installation of a roller compacted concrete (RCC) auxiliary spillway atop a lime treated soil embankment.