It shall be the duty, at all hours, by night as well as day, to pass all boats and floats presenting themselves at their locks. — Charles Mercer, President, C&O Canal Company
Every time his boat passed through a lock, a boat captain . . . — — Map (db m103222) HM
[ Panel 1] “... in our midst exists one of the most imposing and wonderful structures which engineering skill could devise ...” --William T.S. Curtis, November 1, 1897, from a paper read before the Columbia Historical Society. . . . — — Map (db m22636) HM
The “drop gate” on this lift lock was a technological advance over the more common swing-gate lock. It was faster and could be more easily operated by a single employee.
Only a few drop-gates were installed on the canal, most of . . . — — Map (db m103200) HM
After being neglected for nearly a decade, the Chesapeake and Ohio Canal received new life with the New Deal programs in the late 1930s. Two African American Civilian Conservation Corps camps were setup at nearby Cabin John and Carderock to restore . . . — — Map (db m105328) HM
Most canal locks were "swing-gate" locks, opened by pulling or pushing long balance beams that projected from the gates.
Stone for the Seven Locks (locks 7 through 14) was cut and finished by stonemasons who were paid by the "piece." Arrows, . . . — — Map (db m125187) HM
A long blast on a tin horn followed by the boatman's shout of "Hey-ey-ey! Lock! Aw, Lock!" summoned the lock-keeper to duty. Lock-keepers were hired to "attend constantly and diligently by day and night," during the nine month boating season. They . . . — — Map (db m125189) HM