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"Bridge -6 - Rock Creek- Cast-iron 48" pipe lines to Gravity - 1859." Construction photo of Pennsylvania Avenue Bridge, 1859. Photograph courtesy Washington Aqueduct Division, U.S. HAER DC,WASH,593-6.tif - Fæ
Tubular Bridge, through the pipes of which the city of Washington is supplied with water. Built by Gen. M.C. Meigs LCCN2006681119.jpg - Fæ
Tubular Bridge, through the pipes of which the city of Washington is supplied with water. Built by Gen. M.C. Meigs LCCN2006681119.tif - Fæ
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