Barber Dam Rehabilitation

McAlvain served as the General Contractor for the Barber Dam Rehabilitation project which included the restoration of the timber crib inside the north end of the dam.  Work included removal of the sluiceway, drilling and installing rock anchors, as well as forming and placing the new concrete section of the spillway.  Additional details include river diversion, and lay down revegetation. Challenges: In-river construction (1) Diverting the river:  Initial work was completed during winter months when water levels were lower.  A cofferdam was installed within the river above the dam with geo bags built up down the middle of the dam to provide a barrier during construction.  (2) Providing access to the north end of the dam:  A temporary bridge was constructed using rail car beds crossing the power house river outlet to provide access to the site for equipment/ existing material removal/new material.  The bridge also needed to be constructed to anticipate higher expected flow levels to come in the later months.

Capabilities Utilized:

  • General Contracting Services