Excerpt from map of Alameda Airport, Benton Field, and San Francisco Bay Airdrome, circa 1938, showing location of Pan American Lagoon prior to 1940 landfill during base construction.

Excerpt from map of Alameda Airport, Benton Field, and San Francisco Bay Airdrome, circa 1938, showing location of Pan American Lagoon prior to 1940 landfill during base construction.  Present shoreline highlighted in red for reference.

Map prepared by Ace and Judy Campbell, American Aviation Historical Society. 

Photograph by Bill Threlfall, courtesy of Alameda Naval Air Museum, 2009.

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