Tallest Dams in Pennsylvania

Pennsylvania has 1472 dams with recorded heights. The tallest is Harmar Refuse Bank at 410 feet. Taller dams impound more water and carry greater potential energy, which is why height is a key factor in hazard classification and inspection requirements.

#	Dam	County	Height (ft)	Type	Purpose	Hazard	Year
1	Harmar Refuse Bank	Allegheny	410	Other	Other	High	1957
2	Little Blue Run	Beaver	400	Rockfill	Other	High	1977
3	Cumberland No. 1 Slurry Pond 1	Greene	380	Earth	Other	High	1984
4	Cumberland No. 2 Slurry Pond	Greene	370	Earth	Other	High
5	Bailey Mine Area No. 3 Slurry	Greene	337	Earth	Other	High	2014
6	Bailey No. 8 Slurry Impoundment	Greene	317	Earth	Other	High
7	Bailey Mine Slurry Impoundment	Greene	315	Earth	Other	High	1984
8	Emerald No. 1 Main Valley Eastern	Greene	310	Earth	Other	High
9	Mathies Mine Refuse Area Pond #2	Washington	300	Earth	Other	High	1982
10	Emerald No. 2 Main Valley Eastern	Greene	270	Earth	Other	High
11	Labelle Slurry Pond #3	Fayette	245	Earth	Other	High	1958
12	Hughes Hollow Slurry Impoundment	Greene	245	Earth	Other	High
13	Cornwall Tailings	Lebanon	200	Rockfill	Tailings	High	1961
14	Weisner Hollow Slurry	Jefferson	192	Rockfill	Other	High
15	Mine No 84 - Pond 6 Main	Washington	185	Earth	Other	High	1980
16	East Branch Dam	Elk	184	Earth	Flood Risk Reduction	High	1952
17	Youghiogheny Dam	Fayette	184	Earth	Flood Risk Reduction	High	1944
18	Cambria Slurry Pond #4	Cambria	178	Earth	Other	High
19	Beltzville Dam	Carbon	177	Rockfill	Flood Risk Reduction	High	1969
20	Kinzua Dam	Warren	177	Rockfill	Flood Risk Reduction	High	1965
21	George B Stevenson	Cameron	166	Earth	Flood Risk Reduction	High	1956
22	Alvin R. Bush Dam	Clinton	165	Rockfill	Flood Risk Reduction	High	1962
23	Bailey Mine Fresh Water Imp	Greene	164	Earth	Grade Stabilization	High	1984
24	Mahoning Creek Dam	Armstrong	162	Gravity	Flood Risk Reduction	High	1941
25	Tionesta Dam	Forest	154	Earth	Flood Risk Reduction	High	1940
26	Russelton Slurry Pond No 3	Allegheny	153	Earth	Other	Low	1967
27	Penn Forest	Carbon	151	Roller-Compacted Concrete	Water Supply	High	1998
28	Cowanesque Dam	Tioga	151	Rockfill	Flood Risk Reduction	High	1980
29	Horne No 5 Slurry	Washington	146	Earth	Other	High	1984
30	Grace Mine Tailings	Berks	145	Earth	Recreation	High	1957
31	Conemaugh Dam	Westmoreland	144	Gravity	Flood Risk Reduction	High	1952
32	Crooked Creek Dam	Armstrong	143	Earth	Flood Risk Reduction	High	1940
33	Prompton Dam	Wayne	140	Earth	Flood Risk Reduction	High	1961
34	Ash Basin No 2	Snyder	136	Earth	Other	High	1955
35	Wild Creek	Carbon	135	Earth	Water Supply	High	1941
36	Robena Slurry Pond No 4	Greene	135	Earth	Other	Low	1955
37	Watres	Lackawanna	135	Earth	Water Supply	High	1925
38	Laurel Creek	Mifflin	135	Rockfill	Water Supply	High	1972
39	Kinzua Upper Reservoir Dike	Warren	135	Rockfill	Hydroelectric	High	1970
40	Curwensville Dam	Clearfield	131	Rockfill	Flood Risk Reduction	High	1965
41	Piney	Clarion	129	Concrete	Hydroelectric	High	1924
42	Christian E Siegrist	Schuylkill	125	Roller-Compacted Concrete	Water Supply	High	1994
43	Isabella Fresh Water	Fayette	122	Earth	Grade Stabilization	Significant
44	Hammond Dam	Tioga	122	Rockfill	Flood Risk Reduction	High	1978
45	Fawn Mine #91 Refuse Impoundment	Butler	120	Earth	Other	High
46	Maple Creek Slurry Pond 1	Washington	120	Earth	Other	High	1973
47	Loyalhanna Dam	Westmoreland	120	Gravity	Flood Risk Reduction	High	1942
48	Hobo Ventures	Washington	118	Earth		Low
49	Ash Basin No 3	Snyder	117	Earth	Other	High	1971
50	Saltlick	Cambria	116	Earth	Water Supply	High	1913

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