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Port of San Francisco Pier 48

The $7.3 million seismic retrofit of Pier 48 included driving 30 pipe piles, 115 feet long and 6 feet in diameter, through the pier and bay mud. Overaa used a special vibratory pile driving hammer to decrease loud pounding noises typically associated with pile driving. This alternative reduced noise pollution and caused less stress to aquatic life (and Giants fans in the Ball Park across the street!)