Relief shown by contours. Depths shown by contours and soundings. Oriented with north toward the upper left. Includes 3 cross-sections and frontal view of proposed dam on Rock Creek. LC copy 1 fold-lined, torn, and mounted on cloth backing. Copy 2 missing lower quarter, soiled, annotated in ink in upper margin, and mounted on cloth backing. Available also through the Library of Congress Web site as a raster image. 2 copies DCP
Unknown author<span style="display: none;">Unknown author</span>
1883
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