The Pedestrian Culvert, located in Taipei City, was damaged by seriously leakage problem and closed by city government for years. Before repairing, the ground water composed with sand, leakage into with volume of 40 L/sec. The repairing was bided as a turnkey contract. It includes engineering planning and detail design, grouting outside the structure, polyurethane injection to fix the stator and structure damage repairing by epoxy resin injection. The project was finished in Jan. 2001. Total contract amount is NT$7.2 millions.