COATINGS ON DAM INTACT 4 YEARS AFTER REHAB, SALT REMOVAL, REPAINTING

To rehabilitate deteriorated concrete components of Arizona's Coolidge Dam and the roadway running across the top of the structure, the U.S. Bureau of Reclamation initiated a project in 1995 that combined concrete repair, pressure washing with a solution of liquid soluble salt remover, and coating application with its own coating formula composed of a vinyl ester resin blended with other ingredients. The areas targeted for repair were the spillway walls and sidewalls of the dam, the curbs of the roadway across the top of the dam, the pylon structures on each side of the roadway at each end of the dam, and the roof of the powerhouse. The dam was constructed in 1928 and is located in a mountain canyon subject to high winds that carry large amounts of chloride-laden, and therefore, corrosive soil. By the mid-1990s, corrosion rates in parts of the structure had been accelerated by high chloride levels in the aggregate, the concrete, the soil in the surrounding countryside, and the water the dam was meant to control. The concrete repair, pressure washing, and coating operation took approximately one month to complete in 1995. In 1999, the contractor inspected the work on the top of the dam. No cracks were evident in the concrete, and the paint was in good condition, with no peeling scroll work on the pylons.

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  • Supplemental Notes:
    • Page Range: pp 56, 59-62, 64, 67, 69-71
  • Corporate Authors:

    Technology Publishing Company

    2100 Wharton Street, Suite 310
    Pittsburgh, PA  United States  15203
  • Authors:
    • Johnson, J
  • Publication Date: 1999-10

Language

  • English

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Filing Info

  • Accession Number: 00778208
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 22 1999 12:00AM