SAN FRANCISCO (AP) — The general contractor that managed construction of San Francisco’s troubled $2.2 billion transit terminal is suing the agency in charge of the project alleging faulty design and mismanagement.

The joint venture of Webcor Builders and Obayashi Corp. filed the lawsuit Tuesday in San Francisco.

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The lawsuit claims design and planning mistakes sent construction soaring and led to costs overruns that cost the joint venture $150 million.

The contractor said it submitted 12,000 requests for information and 1,603 change order requests to officials with the Transbay Joint Powers Authority during construction of the terminal in downtown San Francisco.

“There were incomplete drawings. There were more than 1,600 change orders to this project. Some of those weren’t handled very quickly by TJPA,” said Sam Singer, spokesperson for Webcor/Obayashi. “That caused there to be approximately $150,000,000 dollars to be paid to Webcor and other subcontractors that needs to be paid.”

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The project has been mired in litigation.

The terminal closed last month after cracks were found in steel beams. The lawsuit filed has nothing to do with the recently discovered cracked beams.

Late Wednesday, the TJPA issued a statement saying they are reviewing the lawsuit. But in the same statement, the agency insisted they would hold those contractors to their scheduled timetables.

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