Navigation Dams

388 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Mississippi River Lock and Dam 7 La Crosse	Significant Hazard	16 ft	1937	Concrete	Minnesota
Mississippi River Lock and Dam 8 Houston	Significant Hazard	30 ft	1937	Concrete	Wisconsin
Mississippi River Lock and Dam 9 Allamakee	Significant Hazard	18 ft	1937	Concrete	Wisconsin
Mississippi River Locks and Dam 1 Hennepin	Significant Hazard	49 ft	1917	Concrete	Minnesota
Mississippi River Locks and Dam 14 Scott	Significant Hazard	—	1939	Concrete	Iowa
Mississippi River Locks and Dam 15 Scott	Significant Hazard	—	1934	Concrete	Iowa
Mississippi River Locks and Dam 27 Madison	Significant Hazard	25 ft	1962	Rockfill	Missouri
Moline Power Rock Island	Low Hazard	31 ft	1896	Concrete	Illinois
Monongahela River Locks and Dam 3 Allegheny	Significant Hazard	—	1907	Gravity	Pennsylvania
Montgomery Locks and Dam Beaver	Significant Hazard	—	1936	Gravity	Pennsylvania
Montgomery Point Lock and Dam Desha	Significant Hazard	14 ft	2004	Concrete	Arkansas
Morgantown Lock and Dam Monongalia	Low Hazard	—	1950	Gravity	West Virginia
Moss Bluff Lock and Spillway Marion	Low Hazard	44 ft	1969	Earth	Florida
Movable Dam At Mays Point Seneca	Low Hazard	10 ft	1915	Other	New York
Mud Lock C&S Canal Dam Cayuga	High Hazard	20 ft	1912	Other	New York
Murray Lock and Dam Pulaski	Significant Hazard	23 ft	1969	Concrete	Arkansas
Newburgh Locks and Dam Henderson	Significant Hazard	—	1975	Concrete	Kentucky
New Charles River Dam Suffolk	Significant Hazard	36 ft	1978	Concrete	Massachusetts
New Cumberland Locks and Dam Jefferson	Significant Hazard	—	1963	Gravity	West Virginia
Newt Graham Lock and Dam Wagoner	Significant Hazard	48 ft	1970	Concrete	Oklahoma
Nickajack Dam Marion	High Hazard	81 ft	1967	Concrete	Tennessee
Norrell Lock and Dam Arkansas	Significant Hazard	2 ft	1967	Concrete	Arkansas
North Grant	High Hazard	145 ft	1950	Earth	Washington
North Lake A Dam (Spillway) Herkimer	Low Hazard	15 ft	1850	Earth	New York
North Lake B Dam Herkimer	Low Hazard	35 ft	1850	Earth	New York
North Lake C Dam Herkimer	Low Hazard	27 ft	1850	Earth	New York
North Twin Penobscot	High Hazard	35 ft	1934	Earth	Maine
North Twin - Dike 1 Penobscot	Significant Hazard	11 ft	1934	Earth	Maine
North Twin - Dike 2 Penobscot	Significant Hazard	11 ft	1934	Earth	Maine
North Twin - Dike 3 Penobscot	Significant Hazard	15 ft	1934	Earth	Maine
North Twin - Dike 4 Penobscot	Significant Hazard	11 ft	1934	Earth	Maine
North Twin - Dike 5 Penobscot	Significant Hazard	11 ft	1934	Earth	Maine
North Twin - Dike 6 Piscataquis	High Hazard	13 ft	1934	Earth	Maine
Northumberland Dam Washington	Low Hazard	16 ft	1870	Concrete	New York
Oahe Dam Stanley	High Hazard	—	1966	Earth	South Dakota
Old Hickory Lock and Dam Davidson	High Hazard	—	1954	Concrete	Tennessee
Olmsted Locks and Dam Ballard	Significant Hazard	49 ft	2018	Concrete	Illinois
Opekiska Lock and Dam Monongalia	Low Hazard	—	1967	Gravity	West Virginia
Ortona Lock and Dam Glades	Low Hazard	—	1937	—	Florida
Osullivan Grant	High Hazard	200 ft	1948	Earth	Washington
Ozark-Jetta Taylor Lock and Dam Franklin	Significant Hazard	42 ft	1969	Concrete	Arkansas
Panasuk Dam Roosevelt	Significant Hazard	57 ft	—	Earth	Montana
Paris Douglas	High Hazard	51 ft	1963	Earth	Oregon
Pawtucket Dam Middlesex	Low Hazard	16 ft	1848	Masonry	Massachusetts
Pearl River Lock 1 and Spillway St. Tammany	Significant Hazard	—	1949	Concrete	Louisiana
Pearl River Lock 2 and Bogue Chitto Sill St. Tammany	Significant Hazard	—	1950	Gravity	Louisiana
Pearl River Lock 3 and Pools Bluff Sill St. Tammany	Significant Hazard	—	1950	Gravity	Louisiana
Peoria Lock and Dam Tazewell	Significant Hazard	—	1939	Concrete	Illinois
Perry Dam Jefferson	High Hazard	121 ft	1969	Earth	Kansas
Phoenix Lock & Dam No. 1 Oswego	Significant Hazard	11 ft	1914	Concrete	New York