Relief shown by contours and spot heights. Depths shown by soundings. Includes index map on chart 14. "The aerial photography was begun July 29, 1929 ..." "Aerial photogrpahy, horizontal and vertical control and mapping by Brock & Weymouth Inc., Philadelphia Pa. Soundings by U.S. Engineer Office, Louisville, Ky." Imprint: Washington, D.C. : Engineer Reproduction Plant, 1930. Dimensions: 63 x 101 cm, on sheets 72 x 107 cm