Montgomery County topographic maps

Average elevation: 86 m

Average elevation: 112 m

Between the 1990 and 2000 census, North Potomac gained and lost land. The loss was caused when a portion of the North Potomac territory, plus Potomac territory, was used to create the Travilah census designated place. According to the United States Census Bureau, North Potomac has a total area of 6.6 square…

Average elevation: 116 m

Average elevation: 136 m

Average elevation: 122 m

Average elevation: 111 m

Average elevation: 136 m

Average elevation: 133 m

Average elevation: 78 m

Average elevation: 98 m

Average elevation: 101 m

Average elevation: 137 m

Average elevation: 104 m

Average elevation: 124 m

Average elevation: 196 m

Ground was broken for construction of the C&O Canal on July 4, 1828. One of the early plans was for the canal to be a way to connect the Chesapeake Bay with the Ohio River. The canal has several types of locks, including 74 lift locks necessary to handle a 608-foot (185 m) difference in elevation between the…

Average elevation: 73 m

Average elevation: 81 m

Average elevation: 86 m