Significant Hazard Dams

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Dam Name	Hazard	Height	Built	Type	State
Wyassup Lake Dam New London	Significant Hazard	15 ft	1920	Earth	Connecticut
Wyatt Lake Dam Shelby	Significant Hazard	—	1968	Earth	Alabama
Wye Mills Dam Queen Anne's	Significant Hazard	20 ft	1682	Earth	Maryland
Wyndemere Swm Pond Howard	Significant Hazard	13 ft	1995	Earth	Maryland
Wyndham Lake Dam Henrico	Significant Hazard	17 ft	—	Earth	Virginia
Wynn and Harrell No 1 Dam Lowndes	Significant Hazard	—	—	Earth	Alabama
Wynn and Harrell No 2 Dam Lowndes	Significant Hazard	—	—	Earth	Alabama
Wyoming Development Company No. 1 Platte	Significant Hazard	45 ft	1960	Earth	Wyoming
Wyoming Hereford Ranch No. 1 Laramie	Significant Hazard	28 ft	1930	Earth	Wyoming
Wyoming Hereford Ranch No. 2 Laramie	Significant Hazard	31 ft	1936	Earth	Wyoming
Wysong Dam Grand Traverse	Significant Hazard	11 ft	1989	Earth	Michigan
Yamhill Vista Dam #5 Yamhill	Significant Hazard	27 ft	—	Earth	Oregon
Yanktonai Dam McLean	Significant Hazard	21 ft	1935	Earth	North Dakota
Yantacaw Brook Dam Essex	Significant Hazard	8 ft	—	Earth	New Jersey
Yarger Lake Dam Morgan	Significant Hazard	48 ft	1973	Earth	Missouri
Yaskot & Ahearn Spillway New Haven	Significant Hazard	10 ft	1880	Concrete	Connecticut
Yates Center Reservoir Dam (Multi-Purpose Dam) Woodson	Significant Hazard	47 ft	1990	Earth	Kansas
Yates Lake Dam Dallas	Significant Hazard	—	1973	Earth	Alabama
Yellow Creek Upground Reservoir Putnam	Significant Hazard	30 ft	2006	Earth	Ohio
Yellow Lakes Dam Summit	Significant Hazard	—	—	—	Utah
Yellow Mill Dam New London	Significant Hazard	6 ft	—	Earth	Connecticut
Yelton Dam Rutherford	Significant Hazard	—	—	Earth	North Carolina
Yerington Mill Dam Lyon	Significant Hazard	90 ft	—	Earth	Nevada
Yerington No 2 Dam Lyon	Significant Hazard	10 ft	—	Earth	Nevada
Yielding Lake Dam Shelby	Significant Hazard	—	1965	Earth	Alabama
Yingst Dauphin	Significant Hazard	16 ft	1999	Earth	Pennsylvania
Ylsa Lake Dam Monroe	Significant Hazard	20 ft	1995	Earth	Illinois
Ymca Camp Classen No.1 Murray	Significant Hazard	30 ft	1940	Earth	Oklahoma
Ymca Camp Classen No. 2 Murray	Significant Hazard	40 ft	1968	Earth	Oklahoma
Ymca Camp Farnam Pond Dam Middlesex	Significant Hazard	26 ft	1931	Concrete	Connecticut
Ymca Camp Takodah Sewage Lagoon Dam Cheshire	Significant Hazard	8 ft	1940	Earth	New Hampshire
Yogi Bear Jellystone-Raintree Lake Dam Scott	Significant Hazard	24 ft	1955	Earth	Indiana
Yokum Pond Dam Berkshire	Significant Hazard	9 ft	—	Earth	Massachusetts
Yonce Dam Edgefield	Significant Hazard	26 ft	1910	—	South Carolina
York Bldg Products Settling Pond 10 Cecil	Significant Hazard	48 ft	1991	Earth	Maryland
York Bldg Products Settling Pond 11 Cecil	Significant Hazard	51 ft	1999	Earth	Maryland
York Bldg Products Settling Pond 12 Cecil	Significant Hazard	70 ft	2004	Earth	Maryland
York Bldg Products Settling Pond 13 Cecil	Significant Hazard	45 ft	2016	Earth	Maryland
York Bldg Products Settling Pond 9 Cecil	Significant Hazard	43 ft	1988	Earth	Maryland
York Creek WS SCS Site 11 Dam Guadalupe	Significant Hazard	35 ft	1962	Earth	Texas
York Creek WS SCS Site 6 Dam Guadalupe	Significant Hazard	31 ft	1962	Earth	Texas
York Lake Dam Berkshire	Significant Hazard	23 ft	1934	Earth	Massachusetts
York No 2 Dam Lowndes	Significant Hazard	—	—	Earth	Alabama
York Pond Dam Crawford	Significant Hazard	15 ft	—	Earth	Illinois
Yorkville Dam Kendall	Significant Hazard	12 ft	1961	Gravity	Illinois
Youngs Brook Rutland	Significant Hazard	46 ft	1920	Earth	Vermont
Youngs Creek #3 Delta	Significant Hazard	21 ft	1894	Earth	Colorado
Youngs Lake Cascades Dam King	Significant Hazard	—	1950	Earth	Washington
Youngs Pond Dam New Haven	Significant Hazard	10 ft	—	Concrete	Connecticut
Youngstown Country Club Lake Dam Trumbull	Significant Hazard	15 ft	—	Earth	Ohio