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The project began in 1997 but was suspended due to excessive water infiltration into the drilled tunnels. In 2002 a redesigned tunnel incorporating a new drilling technique and a custom designed culvert was bid for $242 million. According to the contractor, this new tunnels are designed to withstand 900 ft of hydrostatic water pressure, a standard no tunnel in the world has ever had to meet. Adding to the difficulty, the tunnels cross several branches of the San Andreas fault lines. Recent mudslides and heavy rains have pushed back the original completion date of 2007.