The rail link supplied goods and mass transit to the Panama Pacific International Exposition the following year; the U.S. Army utilized the line for construction of the port of embarkation at Fort Mason.

[2] The tunnel operated as part of the State Belt Railroad until the route's suspension in 1993.

A portion of the movie Dirty Harry was filmed on either side of the tunnel in 1971.

[3] In 2012, the National Park Service released a final environmental impact report on providing extended service through the tunnel to the San Francisco Municipal Railway F Market & Wharves line.

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