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Location: San Juan, Puerto Rico
Owner: Commonwealth of Puerto Rico Highway & Transit Authority
Client: Kiewit-Kenny-Zachry JV/CMA Architects & Engineers

00The Río Piedras Contract consists of a 1,500-meter long underground rapid transit guideway with two underground subway stations. The project is partially funded by the U.S. Federal Government as a demonstration DB project. The alignment traverses a dense urban area and geotechnical conditions consist of weathered alluvium (soft ground). Most of the project structures are located below the groundwater table and many of the tunnels pass beneath occupied historical buildings with less than 5 meters of cover.

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