39 lakes tracked ·
39 with a current elevation reading ·
USGS Water Services + USACE CWMS Data
Ohio has 39 lakes and reservoirs tracked here — 39 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 totalsOhio · USGS + USACE
Lakes tracked
39
39 report a current pool-elevation reading; the rest report storage only.
With elevation reading
39
With %-full figure
0
All Ohio lakes
Every lake tracked in Ohio. 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.
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 Ohio lake in detail
Each lake tracked in Ohio 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.
Alum Creek Lake
USACE · reading Aug 22, 2026, 1:15 PM (UTC+00:00)
Pool elevation
889.53 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
87,044 acre-ft
Recent trend
↓Falling
−0.1 ft over the trend window
Alum Creek Lake is held back by Alum Creek Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 93 ft high and running 10,200 ft along its crest , built across ALUM CREEK OF BIG WALNUT CRK. in Delaware County , near WESTERVILLE . It was completed in 1974 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00931 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 4:15 AM (UTC-04:00) Provisional
Pool elevation
928.25 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
26,128 acre-ft
Recent trend
↑Rising
+0.4 ft over the trend window
Atwood Lake is held back by Atwood Dam , 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 3,700 ft along its crest , built across INDIAN FORK OF CONOTTON CREEK in Tuscarawas County , near NEW CUMBERLAND . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00006 — U.S. Army Corps of Engineers, public domain.
Source: USGS site 03121000 · USACE LRH/Atwood-Lake, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
Official page for Atwood Lake →
Beach City Lake
USACE · reading Aug 22, 2026, 1:15 PM (UTC+00:00)
Pool elevation
948.66 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
2,004 acre-ft
Recent trend
→Steady
−0.1 ft over the trend window
Beach City Lake is held back by Beach City Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 68 ft high and running 5,600 ft along its crest , built across SUGAR CREEK OF TUSCARAWAS RVR in Tuscarawas County , near BEACH CITY . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00005 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 4:00 AM (UTC-04:00) Provisional
Pool elevation
1,023.04 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
51,688 acre-ft
Recent trend
↑Rising
+1.0 ft over the trend window
Berlin Lake is held back by Berlin Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 96 ft high and running 5,750 ft along its crest , built across MAHONING RIVER in Mahoning County , near BERLIN CENTER . It was completed in 1943 , 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 OH00032 — U.S. Army Corps of Engineers, public domain.
Source: USGS site 03090000 · USACE LRP/Berlin-Lake, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00).
Official page for Berlin Lake →
Bolivar Lake
USACE · reading Aug 22, 2026, 1:15 PM (UTC+00:00)
Pool elevation
899.21 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
431 acre-ft
Recent trend
↓Falling
−0.4 ft over the trend window
Bolivar Lake is held back by Bolivar Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 87 ft high and running 6,300 ft along its crest , built across SANDY CREEK in Stark County , near BOLIVAR . It was completed in 1938 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00004 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:30 AM (UTC-04:00) Provisional
Pool elevation
891.95 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+0.2 ft over the trend window
Buckeye Lake is held back by Buckeye Lake Dam , a other structure , standing 15 ft high and running 21,700 ft along its crest , built across TRIBUTARY TO SOUTH FORK LICKING RIVER in Licking County , near BUCKEYE LAKE . It was completed in 1832 , and is owned by ODNR, Division of Parks & Watercraft , to a design credited to GANNETT FLEMING.
Its recorded primary purpose is recreation — holding a stable pool through the season is an operating goal, so a level well off normal in summer is unusual rather than routine. 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 OH00474 — U.S. Army Corps of Engineers, public domain.
Caesar Creek Lake is held back by Caesar Creek Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 180 ft high and running 2,650 ft along its crest , built across CAESAR CREEK in Warren County , near OREGONIA . It was completed in 1976 , and is owned by USACE - Louisville 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 OH00927 — U.S. Army Corps of Engineers, public domain.
Other gauges at this same structure: Caesar Creek Lake at Wellman (USGS site 03242340 · USACE LRL/CaesarCreek) — 849.09 ft (NGVD29) — 102,290 acre-ft.
Charles Mill Lake is held back by Charles Mill Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 52 ft high and running 1,390 ft along its crest , built across BLACK FORK OF MOHICAN RIVER in Ashland County , near MIFFLIN . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00020 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
1,012.02 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
36,952 acre-ft
Recent trend
→Steady
−0.0 ft over the trend window
Clarence J Brown Reservoir is held back by Clarence J. Brown Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 98 ft high and running 6,620 ft along its crest , built across BUCK CREEK in Clark County , near SPRINGFIELD . It was completed in 1973 , and is owned by USACE - Louisville District , to a design credited to CELRL.
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 OH00028 — U.S. Army Corps of Engineers, public domain.
Other gauges at this same structure: Cj Brown Reservoir (USACE LRL/CJBrown-Lake) — 1,012.06 ft (NGVD29).
USGS · reading Aug 31, 2026, 4:15 AM (UTC-04:00) Provisional
Pool elevation
898.29 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
28,001 acre-ft
Recent trend
↑Rising
+0.4 ft over the trend window
Clendening Lake at Tippecanoe is held back by Clendening Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 64 ft high and running 950 ft along its crest , built across BRUSHY FK OF STILLWATER CK in Harrison County , near TIPPECANOE . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00012 — U.S. Army Corps of Engineers, public domain.
Deer Creek Lake is held back by Deer Creek Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 93 ft high and running 3,880 ft along its crest , built across DEER CREEK in Pickaway County , near WILLIAMSPORT . It was completed in 1968 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00008 — U.S. Army Corps of Engineers, public domain.
Delaware Lake is held back by Delaware Dam , a concrete structure , standing 92 ft high and running 18,600 ft along its crest , built across OLENTANGY RIVER in Delaware County , near DELAWARE . It was completed in 1951 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00015 — U.S. Army Corps of Engineers, public domain.
Dillon Lake is held back by Dillon Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 118 ft high and running 1,400 ft along its crest , built across LICKING RIVER in Muskingum County , near ZANESVILLE . It was completed in 1960 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00007 — U.S. Army Corps of Engineers, public domain.
Dover Lake is held back by Dover Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 83 ft high and running 824 ft along its crest , built across TUSCARAWAS RIVER in Tuscarawas County , near DOVER . It was completed in 1938 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00003 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:30 AM (UTC-04:00) Provisional
Pool elevation
732.99 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
90,441 acre-ft
Recent trend
↓Falling
−0.4 ft over the trend window
East Fork Lake is held back by William H. Harsha Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 205 ft high and running 1,450 ft along its crest , built across EAST FORK OF LITTLE MIAMI in Clermont County , near BATAVIA . It was completed in 1973 , and is owned by USACE - Louisville District , to a design credited to CELRL.
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 OH00929 — U.S. Army Corps of Engineers, public domain.
Other gauges at this same structure: Harsha Lake (USACE LRL/WHHarsha-Lake) — 733.12 ft (NGVD29).
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
755.76 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+0.1 ft over the trend window
Griggs Reservoir at Columbus is held back by Julian Griggs Dam , a concrete structure , standing 52 ft high and running 983 ft along its crest , built across SCIOTO RIVER in Franklin County , near UPPER ARLINGTON . It was completed in 1905 , and is owned by City of Columbus , to a design credited to JULIAN GRIGGS.
Its recorded primary purpose is water supply — delivering water to its customers comes first, so drawdown here follows demand as much as it follows rainfall. 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 OH00740 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:00 AM (UTC-04:00) Provisional
Pool elevation
893.47 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+3.3 ft over the trend window
Hoover Reservoir at Central College is held back by Hoover Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 86 ft high and running 2,583 ft along its crest , built across BIG WALNUT CREEK in Franklin County , near CENTRAL COLLEGE . It was completed in 1956 , and is owned by City of Columbus , to a design credited to BURGESS AND NIPLE, LTD., COLUMBUS, OHIO.
Its recorded primary purpose is water supply — delivering water to its customers comes first, so drawdown here follows demand as much as it follows rainfall. 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 OH00737 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 4:00 AM (UTC-04:00) Provisional
Pool elevation
996.13 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
↑Rising
+0.1 ft over the trend window
Indian Lake at Russells Point is held back by Indian Lake Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 16 ft high and running 19,860 ft along its crest , built across GREAT MIAMI RIVER in Logan County , near RUSSELLS POINT . It was completed in 1852 , and is owned by ODNR, Division of Parks & Watercraft , to a design credited to STATE OF OHIO.
Its recorded primary purpose is recreation — holding a stable pool through the season is an operating goal, so a level well off normal in summer is unusual rather than routine. 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 poor — a deficiency was recognised that needs attention. National Inventory of Dams record OH00596 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 4:00 AM (UTC-04:00) Provisional
Pool elevation
953.76 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
→Steady
+0.1 ft over the trend window
Lake Loramie is held back by Lake Loramie Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 23 ft high and running 8,230 ft along its crest , built across LORAMIE CREEK in Shelby County , near FORT LORAMIE . It was completed in 1844 , and is owned by ODNR, Division of Parks & Watercraft , to a design credited to Unknown.
Its recorded primary purpose is recreation — holding a stable pool through the season is an operating goal, so a level well off normal in summer is unusual rather than routine. 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 poor — a deficiency was recognised that needs attention. National Inventory of Dams record OH00442 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
962.98 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
17,196 acre-ft
Recent trend
↑Rising
+0.2 ft over the trend window
Leesville Lake is held back by Leesville Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 74 ft high and running 1,695 ft along its crest , built across MCGUIRE CREEK in Carroll County , near SHERRODVILLE . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00014 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
983.12 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
50,956 acre-ft
Recent trend
↓Falling
−0.3 ft over the trend window
Michael J Kirwan Reservoir at Wayland is held back by Michael J. Kirwan Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 83 ft high and running 9,900 ft along its crest , built across WEST BRANCH OF THE MAHONING in Portage County , near WAYLAND . It was completed in 1966 , 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 OH00030 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
947.54 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
21,776 acre-ft
Recent trend
↑Rising
+0.1 ft over the trend window
Milton Reservoir is held back by Lake Milton Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 53 ft high and running 2,840 ft along its crest , built across MAHONING RIVER in Mahoning County , near NEWTON FALLS . It was completed in 1916 , and is owned by ODNR, Division of Parks & Watercraft , to a design credited to J.W. LEDOUX, CONSULTANT.
Its recorded primary purpose is recreation — holding a stable pool through the season is an operating goal, so a level well off normal in summer is unusual rather than routine. 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 poor — a deficiency was recognised that needs attention. National Inventory of Dams record OH00419 — U.S. Army Corps of Engineers, public domain.
Mohawk is held back by Mohawk Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 111 ft high and running 2,330 ft along its crest , built across WALHONDING RIVER in Coshocton County , near WARSAW . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00016 — U.S. Army Corps of Engineers, public domain.
Mohicanville Dam is held back by Mohicanville Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 46 ft high and running 1,220 ft along its crest , built across LAKE FORK OF MOHICAN RIVER in Ashland County , near MOHICANVILLE . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00019 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
899.27 ft
Datum NAVD88
% of conservation pool full
Not reported
Storage
64,982 acre-ft
Recent trend
↓Falling
−0.3 ft over the trend window
Mosquito Creek Lake is held back by Mosquito Creek Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 47 ft high and running 5,650 ft along its crest , built across MOSQUITO CREEK in Trumbull County , near WARREN . 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 OH00031 — U.S. Army Corps of Engineers, public domain.
North Branch Kokosing River Lake is held back by North Branch Kokosing Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 71 ft high and running 1,400 ft along its crest , built across NORTH BRANCH OF KOKOSING in Knox County , near FREDERICKTOWN . It was completed in 1972 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00009 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:00 AM (UTC-04:00) Provisional
Pool elevation
848.59 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
Not reported
Recent trend
→Steady
+0.1 ft over the trend window
O'shaughnessy Reservoir is held back by O'Shaughnessy , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 79 ft high and running 1,510 ft along its crest , built across Scioto River in Delaware County , near Dublin . It was completed in 1924 , and is owned by Columbus, City of .
Its recorded primary purpose is water supply — delivering water to its customers comes first, so drawdown here follows demand as much as it follows rainfall. 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. Its most recent condition assessment was satisfactory — no deficiencies recognised for expected loading. National Inventory of Dams record OH00751 — U.S. Army Corps of Engineers, public domain.
Paint Creek Lake is held back by Paint Creek Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 118 ft high and running 700 ft along its crest , built across PAINT CREEK in Highland County , near BAINBRIDGE . It was completed in 1973 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00017 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
913.60 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
38,876 acre-ft
Recent trend
↑Rising
+0.3 ft over the trend window
Piedmont Lake at Piedmont is held back by Piedmont Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 56 ft high and running 1,750 ft along its crest , built across STILLWATER CREEK in Harrison County , near FREEPORT . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00011 — U.S. Army Corps of Engineers, public domain.
Pleasant Hill Lake is held back by Pleasant Hill Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 113 ft high and running 775 ft along its crest , built across CLEAR FORK OF MOHICAN RIVER in Ashland County , near BRINKHAVEN . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00001 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
835.26 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
59,922 acre-ft
Recent trend
↑Rising
+2.6 ft over the trend window
Senecaville Lake is held back by Senecaville Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 45 ft high and running 2,350 ft along its crest , built across SENECA FORK OF WILLS CREEK in Guernsey County , near SENECAVILLE . It was completed in 1937 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00013 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:15 AM (UTC-04:00) Provisional
Pool elevation
899.59 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
36,440 acre-ft
Recent trend
↑Rising
+0.5 ft over the trend window
Tappan Lake at Tappan is held back by Tappan Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 52 ft high and running 1,550 ft along its crest , built across LITTLE STILLWATER CREEK in Harrison County , near DENNISON . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00010 — U.S. Army Corps of Engineers, public domain.
Tom Jenkins Lake is held back by Tom Jenkins Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 84 ft high and running 944 ft along its crest , built across EAST BR OF SUNDAY CK in Athens County , near GLOUSTER . It was completed in 1950 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00018 — U.S. Army Corps of Engineers, public domain.
USGS · reading Aug 31, 2026, 3:45 AM (UTC-04:00) Provisional
Pool elevation
675.18 ft
Datum NGVD29
% of conservation pool full
Not reported
Storage
950 acre-ft
Recent trend
↓Falling
−0.5 ft over the trend window
West Fork Mill Creek Reservoir is held back by West Fork of Mill Creek Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 106 ft high and running 3,966 ft along its crest , built across WEST FORK OF MILL CREEK in Hamilton County , near WOODLAND . It was completed in 1952 , and is owned by USACE - Louisville District , to a design credited to CELRL.
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 OH00029 — U.S. Army Corps of Engineers, public domain.
Wills Creek Lake is held back by Wills Creek Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 87 ft high and running 1,950 ft along its crest , built across WILLS CREEK in Coshocton County , near WILLS CREEK . It was completed in 1936 , and is owned by USACE - Huntington District , to a design credited to CELRH.
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 OH00002 — U.S. Army Corps of Engineers, public domain.