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The State Street Capitol Ramp and the Government East Ramp, two Madison, Wis., parking garages, had suffered significant corrosion-induced delamination. Over several years we repaired much of the damage and installed concrete overlays in an effort to reduce the rate of continuing deterioration. The performance of specific repairs was periodically monitored. We found that concrete deterioration rates were greatly reduced in one garage, while repairs to the other parking structure were not uniformly effective in reducing the rate of surface delamination.