Conconully Dam CAS Phase II Seismic Modifications

This solicitation seeks offers to perform foundation improvement test sections at Conconully Dam in Okanogan County, Washington. The Bureau of Reclamation within the Department of the Interior is procuring these construction services to conduct seismic testing and analysis through excavated test pits and installed deep soil mixing columns. The contractor must provide instrumentation and monitoring to collect geotechnical data to inform future dam retrofit designs. Proposals will be evaluated based on technical approach, past performance, and price. The initial deadline for questions was June 30, 2021 and the proposal due date is now September 17, 2021.

There is no set-aside designation for this opportunity. The primary NAICS code is 237110 and PSC code is R499. The work is to be performed at Conconully Dam in Conconully, Washington and is expected to have a value between $1-5 million. The contractor will have 240 calendar days to complete the foundation test sections after notice to proceed. Approximately 1,800 cubic yards of soil will be treated through two 20 by 20 foot test sections extending 62 feet in depth to evaluate deep soil mixing methods for the dam.