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Great Falls Dam, Lock No. 20

Maryland, Montgomery County, C&O Canal

Location

StateMaryland
CountyMontgomery
RiverC&O Canal
Coordinates39.00169, -77.24927

Physical Characteristics

NID Height8 ft
Dam Height8 ft
Dam Length-
NID Storage51 acre-ft
Max Storage51 acre-ft
Surface Area-

Safety Classification

Hazard PotentialLow
Condition Assessment-
EAP StatusNo
Last InspectionSeptember 30, 1996
Inspection Frequency-

Dam Information

Year Completed1850
Primary PurposeNavigation
Dam TypeMasonry
Owner TypeFederal
OwnerUS Army Corps of Engineers,Washington Aqueduct Div
Other NameC&O Canal, Great Falls Tavern, Mollys Wall

Location Map

About This Dam Record

Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.

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