31 lakes tracked ·
21 with a current elevation reading ·
USGS Water Services + USACE CWMS Data
Pennsylvania has 31 lakes and reservoirs tracked here — 21 with a current elevation reading, from USGS Water Services and USACE CWMS Data. Sort the table by level, storage, %-full, or trend, then open any lake for its full elevation-with-datum, trend sparkline, storage, and source-and-vintage stamp. Figures are provisional readings for reference — not for navigation or safety decisions.
Statewide totalsPennsylvania · USGS + USACE
Lakes tracked
31
21 report a current pool-elevation reading; the rest report storage only.
With elevation reading
21
With %-full figure
0
All Pennsylvania lakes
Every lake tracked in Pennsylvania. Click a column heading to sort, or filter by name. Elevation lakes
are listed before storage-only lakes; a missing figure always shows "not reported," never an estimate.
Pennsylvania lakes, elevation lakes first, by name.
Data: USGS Water Services (waterservices.usgs.gov) and USACE CWMS Data (cwms-data.usace.army.mil), retrieved 2026-08-31. Both public domain (a work of the U.S. Government, 17 U.S.C. §105).
Every Pennsylvania lake in detail
Each lake tracked in Pennsylvania has its full record here — current reading, recent
trend, and the dam behind it where the National Inventory of Dams has one. Use the table above
to jump to a lake, or read straight through.
Allegheny Reservoir
USGS · reading Aug 31, 2026, 4:00 AM (UTC-04:00) Provisional
Pool elevation
1,325.91 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
555,998 acre-ft
Recent trend
↓Falling
−1.1 ft over the trend window
Allegheny Reservoir is held back by Kinzua Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 177 ft high and running 1,916 ft along its crest , built across ALLEGHENY RIVER in Warren County , near WARREN . It was completed in 1965 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00105 — U.S. Army Corps of Engineers, public domain.
Beltzville Dam is held back by Beltzville Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 177 ft high and running 4,560 ft along its crest , built across POHOPOCO CREEK in Carbon County , near PARRYVILLE . It was completed in 1969 , and is owned by USACE - Philadelphia District , to a design credited to ERIK FLOOR & ASSOCIATES, INC. CONSULTING ENGINEERS.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00010 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
577.88 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+0.2 ft over the trend window
Chambers Lake is held back by Hibernia (Pa-436f) , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 65 ft high and running 700 ft along its crest , built across BIRCH RUN in Chester County . It was completed in 1994 , and is owned by CHESTER COUNTY WATER RESOURCES AUTHORITY , to a design credited to Ward Associates/USDA NRCS.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. Its most recent condition assessment was fair: sound under normal loading, though a rare or extreme event could expose a deficiency. National Inventory of Dams record PA01505 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:30 AM (UTC-04:00) Provisional
Pool elevation
911.01 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
34,556 acre-ft
Recent trend
↑Rising
+2.0 ft over the trend window
Conemaugh Lake is held back by Conemaugh Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 144 ft high and running 1,266 ft along its crest , built across CONEMAUGH RIVER in Westmoreland County , near SALTSBURG . It was completed in 1952 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00101 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
843.41 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
19,118 acre-ft
Recent trend
↓Falling
−0.8 ft over the trend window
Crooked Creek Lake is held back by Crooked Creek Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 143 ft high and running 1,480 ft along its crest , built across CROOKED CREEK in Armstrong County , near FORD CITY . It was completed in 1940 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00102 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
1,652.54 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
48,599 acre-ft
Recent trend
↓Falling
−7.2 ft over the trend window
East Branch Clarion River Lake is held back by East Branch Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 184 ft high and running 1,725 ft along its crest , built across CLARION RIVER in Elk County , near JOHNSONBURG . It was completed in 1952 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00104 — U.S. Army Corps of Engineers, public domain.
F.e. Walter Dam is held back by Francis E. Walter Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 239 ft high and running 3,000 ft along its crest , built across LEHIGH RIVER in Luzerne County , near WHITE HAVEN . It was completed in 1961 , and is owned by USACE - Philadelphia District , to a design credited to CENAP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. NID records no spillway for it. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00008 — U.S. Army Corps of Engineers, public domain.
George B. Stevenson Dam is held back by George B Stevenson , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 166 ft high and running 1,925 ft along its crest , built across FIRST FORK SINNEMAHONING CREEK in Cameron County . It was completed in 1956 , and is owned by DCNR .
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. Its most recent condition assessment was satisfactory — no deficiencies recognised for expected loading. National Inventory of Dams record PA00914 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
1,427.58 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↓Falling
−0.5 ft over the trend window
Glendale Lake is held back by Glendale , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 60 ft high and running 1,800 ft along its crest , built across BEAVERDAM RUN in Cambria County . It was completed in 1960 , and is owned by DCNR .
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. Its most recent condition assessment was fair: sound under normal loading, though a rare or extreme event could expose a deficiency. National Inventory of Dams record PA00912 — U.S. Army Corps of Engineers, public domain.
Jadwin Dam is held back by General Edgar Jadwin Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 110 ft high and running 1,255 ft along its crest , built across DYBERRY CREEK in Wayne County , near HONESDALE . It was completed in 1960 , and is owned by USACE - Philadelphia District .
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00009 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
923.88 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
12,288 acre-ft
Recent trend
↓Falling
−0.3 ft over the trend window
Loyalhanna Creek Lake is held back by Loyalhanna Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 120 ft high and running 960 ft along its crest , built across LOYALHANNA CREEK in Westmoreland County , near SALTSBURG . It was completed in 1942 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00106 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
1,097.53 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
16,684 acre-ft
Recent trend
↓Falling
−4.8 ft over the trend window
Mahoning Creek Reservoir is held back by Mahoning Creek Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 162 ft high and running 926 ft along its crest , built across MAHONING CREEK in Armstrong County , near PUTNEYVILLE . It was completed in 1941 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00107 — U.S. Army Corps of Engineers, public domain.
Prompton Dam is held back by Prompton Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 140 ft high and running 1,200 ft along its crest , built across LACKAWAXEN RIVER in Wayne County , near PROMPTON . It was completed in 1961 , and is owned by USACE - Philadelphia District .
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00011 — U.S. Army Corps of Engineers, public domain.
Seneca Power Upper Reservoir is held back by Kinzua Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 177 ft high and running 1,916 ft along its crest , built across ALLEGHENY RIVER in Warren County , near WARREN . It was completed in 1965 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is gated, so the operator can hold the pool above the spillway crest and meter what leaves. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00105 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
893.53 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
33,887 acre-ft
Recent trend
↑Rising
+0.8 ft over the trend window
Shenango River Reservoir is held back by Shenango Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 68 ft high and running 720 ft along its crest , built across SHENANGO RIVER in Mercer County , near SHARPSVILLE . It was completed in 1965 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00111 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 4:00 AM (UTC-04:00) Provisional
Pool elevation
616.98 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+0.2 ft over the trend window
Struble Lake is held back by R G Struble Lake (Pa-431) , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 31 ft high and running 1,500 ft along its crest , built across EAST BRANCH BRANDYWINE CREEK in Chester County . It was completed in 1971 , and is owned by CHESTER COUNTY WATER RESOURCES AUTHORITY , to a design credited to USDA NRCS.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. Its most recent condition assessment was satisfactory — no deficiencies recognised for expected loading. National Inventory of Dams record PA00621 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
1,090.61 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
9,857 acre-ft
Recent trend
↑Rising
+0.3 ft over the trend window
Tionesta Creek Reservoir is held back by Tionesta Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 154 ft high and running 1,050 ft along its crest , built across TIONESTA CREEK in Forest County , near TIONESTA . It was completed in 1940 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00110 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
1,218.76 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
138 acre-ft
Recent trend
↑Rising
+1.6 ft over the trend window
Union City Reservoir on French Creek is held back by Union City Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 88 ft high and running 1,420 ft along its crest , built across FRENCH CREEK in Erie County , near UNION CITY . It was completed in 1971 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00103 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
1,182.39 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
5,711 acre-ft
Recent trend
↑Rising
+0.5 ft over the trend window
Woodcock Creek Lake is held back by Woodcock Creek Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 90 ft high and running 4,650 ft along its crest , built across WOODCOCK CREEK in Crawford County , near MEADVILLE . It was completed in 1973 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00108 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:30 AM (UTC-04:00) Provisional
Pool elevation
1,440.42 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
160,032 acre-ft
Recent trend
↑Rising
+2.6 ft over the trend window
Youghiogheny River Lake is held back by Youghiogheny Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 184 ft high and running 1,610 ft along its crest , built across YOUGHIOGHENY RIVER in Fayette County , near CONFLUENCE . It was completed in 1944 , and is owned by USACE - Pittsburgh District , to a design credited to CELRP.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00109 — U.S. Army Corps of Engineers, public domain.
Alvin River. Bush Dam is held back by Alvin R. Bush Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 165 ft high and running 1,350 ft along its crest , built across KETTLE CREEK in Clinton County , near RENOVO . It was completed in 1962 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00002 — U.S. Army Corps of Engineers, public domain.
Aylesworth Creek Lake is held back by Aylesworth Creek Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 90 ft high and running 1,270 ft along its crest , built across AYLESWORTH CREEK in Lackawanna County , near EAST JERMYN . It was completed in 1970 , and is owned by USACE - Baltimore District , to a design credited to CENAB, CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00001 — U.S. Army Corps of Engineers, public domain.
Cowanesque Lake is held back by Cowanesque Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 151 ft high and running 3,100 ft along its crest , built across COWANESQUE RIVER in Tioga County , near LAWRENCEVILLE . It was completed in 1980 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA01134 — U.S. Army Corps of Engineers, public domain.
Curwensville Lake is held back by Curwensville Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 131 ft high and running 2,850 ft along its crest , built across WEST BRANCH SUSQUEHANNA RIVER in Clearfield County , near CURWENSVILLE . It was completed in 1965 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00003 — U.S. Army Corps of Engineers, public domain.
Foster Joseph Sayers Dam is held back by Foster Joseph Sayers Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 100 ft high and running 6,835 ft along its crest , built across BALD EAGLE CREEK in Centre County , near HOWARD . It was completed in 1969 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00005 — U.S. Army Corps of Engineers, public domain.
Hammond Lake is held back by Hammond Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 122 ft high and running 6,450 ft along its crest , built across CROOKED CREEK in Tioga County , near TIOGA . It was completed in 1978 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA01133 — U.S. Army Corps of Engineers, public domain.
Indian Rock Dam is held back by York Indian Rock Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 83 ft high and running 1,000 ft along its crest , built across CODORUS CREEK in York County , near YORK . It was completed in 1942 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00007 — U.S. Army Corps of Engineers, public domain.
Raystown Lake is held back by Raystown Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 225 ft high and running 1,700 ft along its crest , built across RAYSTOWN BRANCH JUNIATA RIVER in Huntingdon County , near HUNTINGDON . It was completed in 1973 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00004 — U.S. Army Corps of Engineers, public domain.
Stillwater Lake is held back by Stillwater Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 77 ft high and running 1,700 ft along its crest , built across LACKAWANNA RIVER in Susquehanna County , near FOREST CITY . It was completed in 1960 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA00006 — U.S. Army Corps of Engineers, public domain.
Tioga Lake is held back by Tioga Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 141 ft high and running 2,710 ft along its crest , built across TIOGA RIVER in Tioga County , near TIOGA . It was completed in 1978 , and is owned by USACE - Baltimore District , to a design credited to CENAB.
Its recorded primary purpose is flood risk reduction — the pool is drawn down between storms so there is empty space waiting for the next flood, which is why this level can fall in dry weather and climb sharply after rain. Its spillway is ungated: once the pool reaches the crest, water leaves on its own and the operator cannot hold it back. NID classes it high hazard potential. That describes what a failure would cost downstream — loss of life would be expected — and says nothing about how likely a failure is, or what condition the dam is in. National Inventory of Dams record PA01132 — U.S. Army Corps of Engineers, public domain.