Keywords: Rock Creek and Potomac Parkway tunnel.jpg 56 LOOKING SOUTH FROM ZOO TUNNEL TOWARD DUKE ELLINGTON CALVERT STREET BRIDGE - Rock Creek Potomac Parkway Washington District of Columbia DC LOC-image hhh dc0806/photos 047937p 5 x 7 in accession number HABS Reproduction Number HABS DC WASH 686-56 Call Number HABS DC WASH 686-56 Rights Advisory No known restrictions on images made by the U S Government; images copied from other sources may be restricted http //www loc gov/rr/print/res/114_habs html 38 924228 -77 048271 HABS DC WASH 686-56 Historic American Buildings Survey 1993 in Washington D C Rock Creek and Potomac Parkway Duke Ellington Bridge Road tunnels in Washington D C |