Nelson Tunnel Repair, ISS-EPA, Mineral County, CO

The U.S. Army Corps of Engineers is seeking sources for a construction contract to repair the Nelson Tunnel in Mineral County, Colorado. The project involves constructing a bypass adit, rehabilitating the tunnel, and installing a bulkhead to prevent uncontrolled releases of mine-impacted water. The estimated construction cost is between $10 million and $25 million. The contractor will need to have experience with similar projects, including tunnel construction and remedial action services. The project is expected to be a cost-reimbursable contract, and the contractor will need to have an audited accounting system. • The project requires the construction of a bypass adit to connect to the Nelson Tunnel. • The tunnel rehabilitation will involve repairing the existing tunnel to ensure stability and safety. • The installation of a bulkhead will prevent uncontrolled releases of mine-impacted water. • The contractor will need to have experience with cost-reimbursable contracts and audited accounting systems. • The project is located in a remote area with steep terrain, requiring specialized equipment and expertise.