Navigation Dams

388 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Lock E-18 Dam Herkimer Herkimer	Significant Hazard	6 ft	1915	Other	New York
Lock E-3 Spillway Bypass Dam Saratoga	High Hazard	18 ft	1918	Earth	New York
Lock E-4 Embankment Dam Saratoga	High Hazard	34 ft	1915	Earth	New York
Lock E-5 Spillway Dam Saratoga	High Hazard	26 ft	1918	Earth	New York
Lock E8 Scotia Schenectady	Low Hazard	14 ft	1910	Other	New York
Lock E9 Rotterdam Junction Schenectady	Low Hazard	15 ft	1910	Other	New York
Lockport Lock and Controlling Works Will	High Hazard	—	1933	Concrete	Illinois
London Locks and Dam Kanawha	Significant Hazard	—	1934	Concrete	West Virginia
Long Sault St. Lawrence	High Hazard	104 ft	1958	Concrete	New York
Lookout Point Dam Lane	High Hazard	249 ft	1953	Earth	Oregon
Lower Appleton Locks and Dam Outagamie	Significant Hazard	—	1934	Concrete	Wisconsin
Lower Granite Lock and Dam Whitman	High Hazard	—	1975	Concrete	Washington
Lower Monumental Lock and Dam Franklin	High Hazard	—	1969	Concrete	Washington
Markland Locks and Dam Gallatin	Significant Hazard	—	1964	Concrete	Kentucky
Marmet Locks and Dam Kanawha	Significant Hazard	—	1934	Concrete	West Virginia
Marseilles Lock and Dam LaSalle	Significant Hazard	—	1933	Concrete	Illinois
Massena Intake St. Lawrence	High Hazard	115 ft	1958	Concrete	New York
Mattaceunk Penobscot	High Hazard	45 ft	1939	Concrete	Maine
Maxwell Locks and Dam Washington	Significant Hazard	—	1964	Gravity	Pennsylvania
Maybees Waste Weir Dam Niagara	Significant Hazard	21 ft	1918	Concrete	New York
Mcalpine Locks and Dam Jefferson	Significant Hazard	—	1964	Concrete	Kentucky
McNary Lock and Dam Benton	High Hazard	—	1954	Concrete	Oregon
Mechanicville Rensselaer	Significant Hazard	26 ft	1900	Concrete	New York
Melton Hill Dam Loudon	High Hazard	60 ft	1963	Concrete	Tennessee
Melvin Price Locks and Dam St. Charles	Significant Hazard	72 ft	1990	Concrete	Illinois
Menasha Lock and Dam Winnebago	High Hazard	—	1937	Concrete	Wisconsin
Mendota Locks Dane	High Hazard	16 ft	1849	Other	Wisconsin
Middleport Waste Weir Dam Niagara	Significant Hazard	17 ft	1918	Concrete	New York
Millers Ferry Lock and Dam Wilcox	Significant Hazard	—	1970	Gravity	Alabama
Millinocket Lake Penobscot	High Hazard	20 ft	1910	Concrete	Maine
Minetto Lock & Dam 5 Oswego	High Hazard	23 ft	1915	Concrete	New York
Mississippi River Lock and Dam 10 Clayton	Significant Hazard	20 ft	1937	Concrete	Iowa
Mississippi River Lock and Dam 11 Dubuque	Significant Hazard	—	1937	Concrete	Iowa
Mississippi River Lock and Dam 12 Jo Daviess	Significant Hazard	—	1938	Concrete	Iowa
Mississippi River Lock and Dam 13 Whiteside	Significant Hazard	—	1939	Concrete	Iowa
Mississippi River Lock and Dam 16 Muscatine	Significant Hazard	—	1937	Concrete	Iowa
Mississippi River Lock and Dam 17 Mercer	Significant Hazard	—	1939	Concrete	Iowa
Mississippi River Lock and Dam 18 Des Moines	Significant Hazard	—	1937	Concrete	Iowa
Mississippi River Lock and Dam 19 Lee	Significant Hazard	—	1913	Concrete	Illinois
Mississippi River Lock and Dam 2 Dakota	Significant Hazard	23 ft	1931	Concrete	Minnesota
Mississippi River Lock and Dam 20 Adams	Significant Hazard	—	1936	Concrete	Missouri
Mississippi River Lock and Dam 21 Adams	Significant Hazard	—	1938	Concrete	Missouri
Mississippi River Lock and Dam 22 Ralls	Significant Hazard	—	1938	Concrete	Missouri
Mississippi River Lock and Dam 24 Calhoun	Significant Hazard	55 ft	1940	Concrete	Missouri
Mississippi River Lock and Dam 25 Lincoln	Significant Hazard	25 ft	1939	Concrete	Missouri
Mississippi River Lock and Dam 3 Goodhue	Significant Hazard	26 ft	1938	Concrete	Minnesota
Mississippi River Lock and Dam 4 Wabasha	Significant Hazard	22 ft	1935	Concrete	Wisconsin
Mississippi River Lock and Dam 5 Buffalo	Significant Hazard	22 ft	1935	Concrete	Minnesota
Mississippi River Lock and Dam 5a Winona	Significant Hazard	17 ft	1936	Concrete	Minnesota
Mississippi River Lock and Dam 6 Winona	Significant Hazard	17 ft	1936	Concrete	Wisconsin