Summary
Requires repairs to a deteriorated section of concrete within the stairwell of the intake tower. The deteriorated section of concrete is located at elevation 1116.5 and encompasses an area approximately 8 feet high from elevation 1116.5, 7 F wide from the right wall, and at least 8" deep, or until the contractor encounters sound concrete. The contractor shall sound the concrete, mark the limits of demolition, and remove all unsound material. After demolition, a non-shrink, low-pressure injection grout shall be installed around the full perimeter of the existing concrete to reduce seepage from the gatewell into the stairwell. Reinforcement shall be installed, which includes horizontal, vertical, and bent-hook bars that are doweled and epoxied into the existing structure. All reinforcement must maintain a minimum clear cover of three inches. See outside link.