Tailings Dams

1,362 dams in the US serve this purpose.

Dam Name	Hazard	Height	Built	Type	State
Madison Mine Main Dam Madison	High Hazard	40 ft	1950	Earth	Missouri
Magmont Tailings Dam Iron	High Hazard	135 ft	1979	Other	Missouri
Magnetite Tailings Dam Grant	High Hazard	140 ft	1980	Other	New Mexico
Main Stack Hillsborough	Significant Hazard	103 ft	1989	Earth	Florida
Man01 Manatee	Unknown	8 ft	—	Earth	Florida
Man03 Manatee	Unknown	11 ft	—	Earth	Florida
Man04 Manatee	Unknown	13 ft	—	Earth	Florida
Marathon Brine Pond Dam Stark	High Hazard	23 ft	2008	Earth	Ohio
Mark Edson El Dorado	High Hazard	162 ft	1962	Earth	California
Martin-Marietta Lake Dam Catawba	Low Hazard	—	1969	Earth	North Carolina
Martin-Marietta Quarry Dam Gaston	Significant Hazard	—	1974	Earth	North Carolina
Mayflower Pond # 5 Summit	High Hazard	237 ft	—	Earth	Colorado
Maynard Branch Slurry Impoundment Wayne	High Hazard	262 ft	—	Earth	West Virginia
Mbpp Ash Pond Platte	Low Hazard	25 ft	1984	Earth	Wyoming
Mccoy/Cove Tailings Storage Facility Dam Lander	Low Hazard	140 ft	1988	Rockfill	Nevada
Mcdonald Fork Dam	High Hazard	—	—	Other	West Virginia
Mcelroy Run Dam Pleasants	High Hazard	243 ft	1978	Other	West Virginia
Mcgraw Fork Cr Dam	High Hazard	—	—	Other	West Virginia
Mcintosh No. 1 Fremont	Low Hazard	80 ft	1979	Earth	Wyoming
Meigs Mine No. 1 Slurry Impoundment Meigs	High Hazard	131 ft	—	Other	Ohio
Mesabi Chief Clarification Itasca	Low Hazard	24 ft	1960	Earth	Minnesota
Mesabi Chief Tailings 2 Itasca	Low Hazard	40 ft	1952	Earth	Minnesota
Mesabi Chief Tailings 3 Itasca	Low Hazard	24 ft	1960	Earth	Minnesota
Michigan Limestone Tailings Dam Presque Isle	Low Hazard	50 ft	1969	Earth	Michigan
Midas Dam Tailings Storage Facility Ph V Elko	Significant Hazard	150 ft	1998	Earth	Nevada
Midas Tailings Storage Facility Ph Iv Dam Elko	Significant Hazard	250 ft	1998	Earth	Nevada
Middle Fork Impoundment Martin	High Hazard	190 ft	—	Earth	Kentucky
Mill 2 Pond C Dam Clark	Significant Hazard	17 ft	—	Earth	Nevada
Mill 2 Pond E Dam Clark	Significant Hazard	16 ft	—	Earth	Nevada
Mill #3 Tailings Pond Elko	Low Hazard	107 ft	—	Earth	Nevada
Mill #4 Tailings #1 Dam Eureka	Significant Hazard	182 ft	1989	Earth	Nevada
Mill #4 Tailings #2 Dam Eureka	Significant Hazard	165 ft	1993	Earth	Nevada
Mill 5/6 Center Tailings Storage Facility Eureka	Significant Hazard	300 ft	1991	Earth	Nevada
Mill 5/6 East Tailings Storage Facility Eureka	Significant Hazard	220 ft	2019	Earth	Nevada
Mill 5/6 West Tails Storage Facility Eureka	Low Hazard	210 ft	2011	Earth	Nevada
Mill Creek Santa Cruz	High Hazard	76 ft	1889	Earth	California
Mill Pond Mendocino	Low Hazard	33 ft	1885	Earth	California
Mill Pond Dam No 2 Howard	Low Hazard	20 ft	1962	Rockfill	Arkansas
Millstone Branch Slurry Impoundment No. 1 Pike	High Hazard	285 ft	—	Earth	Kentucky
Millstone Branch Slurry Impoundment No.2 Pike	High Hazard	200 ft	—	Earth	Kentucky
Mineral Park Tailings Dam Mohave	Significant Hazard	200 ft	—	Earth	Arizona
Mineral Point #1 Washington	High Hazard	72 ft	1968	Earth	Missouri
Mineral Point #2 Washington	High Hazard	89 ft	1963	Other	Missouri
Mingo Sportsman Club Pond Dam Jefferson	Significant Hazard	49 ft	1969	Earth	Ohio
Minnetonka Lake Dam Washington	High Hazard	74 ft	1957	Other	Missouri
Minntac Tailings St. Louis	Low Hazard	50 ft	1978	Earth	Minnesota
Minorca Pit South St. Louis	Significant Hazard	30 ft	2008	Earth	Minnesota
Mitchell Bottom Ash Ponds Marshall	Significant Hazard	27 ft	1975	Earth	West Virginia
Mitchell County Reservoir Dam Mitchell	Significant Hazard	70 ft	1991	Earth	Texas
Moab Salt Potash Stockpile Dam Grand	Significant Hazard	—	1962	Earth	Utah