Pennsylvania Dams

1,481 dams tracked by the National Inventory of Dams

Total Dams

1,481

High Hazard

780

52.7%

Poor / Unsatisfactory

215

Average Age

80 yrs

Hazard Classification

High780 (52.7%)
Significant310 (20.9%)
Low378 (25.5%)

Condition Assessment

Satisfactory415 (28.0%)
Fair547 (36.9%)
Poor / Unsatisfactory215 (14.5%)
Not Rated304 (20.5%)

Federal

57

State

152

Local

351

Private

911

All Dams in Pennsylvania

Showing 501525 of 780

Dam NameHeight (ft)YearHazardCondition
Minsi Lake

Northampton County

271970HighSatisfactory
Monroe Lake

Monroe County

121926HighFair
Montgomery

Clearfield County

711960HighPoor
Montour Ash Basin No 1

Montour County

401971HighSatisfactory
Moon Lake

Schuylkill County

12HighPoor
Moose Creek Reservoir

Clearfield County

311910HighPoor
Moraine State Park

Butler County

551968HighSatisfactory
Morris Run No 3

Tioga County

251920HighPoor
Mosquito Creek

Lycoming County

151890HighFair
Mountain Lake

Luzerne County

161910HighFair
Mountain Lake

Somerset County

221956HighFair
Mountain Shadow Lake

Columbia County

201954HighFair
Mountain Springs Lake

Monroe County

181919HighPoor
Mountaintop Lake #1

Monroe County

241993HighFair
Mountaintop Lake #2

Monroe County

121993HighFair
Mount Airy

Monroe County

421974HighPoor
Mount Laurel (Mud Run)

Schuylkill County

391879HighSatisfactory
Muddy Run Intake Channel Dam

Lancaster County

351967HighFair
Musser Forests

Indiana County

221952HighFair
Naylors Run

Delaware County

131975HighSatisfactory
Negro Pond

Wyoming County

71919HighPoor
Neifert Creek (Pa-422a)

Schuylkill County

551968HighSatisfactory
Nesbitt

Lackawanna County

1011903HighSatisfactory
Nesquehoning 4th Hollow Reservoir

Carbon County

511975HighFair
Nevin Creek (Pa-451)

Wayne County

151972HighFair
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.