Kansas lake & reservoir water levels

20 lakes tracked · 20 with a current elevation reading · USGS Water Services + USACE CWMS Data

Kansas has 20 lakes and reservoirs tracked here — 20 with a current elevation reading; 9 report a %-of-conservation-pool-full figure, 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 totals Kansas · USGS + USACE
Lakes tracked
20

20 report a current pool-elevation reading; the rest report storage only.

With elevation reading
20
With %-full figure
9

All Kansas lakes

Every lake tracked in Kansas. 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.

Kansas lakes, elevation lakes first, by name.
Datum Trend
Big Hill Lake 856.96 NGVD29 24,090 95.2% ↑Rising
Cedar Bluff Reservoir 2,119.11 NGVD29 55,060 ↓Falling
Cheney Reservoir 1,420.74 NGVD29 159,000 94.1% ↓Falling
Clinton Lake 876.27 NGVD29 124,400 ↓Falling
Council Grove Lake 1,273.83 NGVD29 42,038 98.8% ↑Rising
El Dorado Lake 1,338.23 NGVD29 144,544 95.9% ↑Rising
Elk City Lake 795.43 NGVD29 32,328 94% ↑Rising
Fall River Lake 948.78 NGVD29 21,287 100% ↑Rising
Hillsdale Lake 917.08 NGVD29 77,810 ↓Falling
Horsethief Reservoir 2,420.47 NAVD88 5,547 ↓Falling
John Redmond Lake 1,041.07 NGVD29 58,902 100% ↑Rising
Kanopolis Lake 1,465.38 NGVD29 55,610 ↓Falling
Marion Lake 1,350.20 NAVD88 74,896 97.5% ↑Rising
Melvern Lake 1,036.12 NGVD29 150,500 ↓Falling
Milford Lake 1,146.25 NGVD29 404,900 ↓Falling
Perry Lake 893.79 NGVD29 224,900 ↓Falling
Pomona Lake 974.21 NGVD29 56,350 ↓Falling
Toronto Lake 902.04 NGVD29 16,725 100% ↑Rising
Tuttle C Lake 1,079.10 NGVD29 305,600 ↓Falling
Wilson Lake 1,511.37 NGVD29 197,800 ↓Falling

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 Kansas lake in detail

Each lake tracked in Kansas 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.

Big Hill Lake

USACE · reading Aug 31, 2026, 8:00 AM (UTC+00:00)

Pool elevation
856.96 ft

Datum NGVD29

% of conservation pool full
95.2%
Storage
24,090 acre-ft
Recent trend
↑Rising

+1.0 ft over the trend window

860.3ft858.1ftJun 2 – Jun 23

Big Hill Lake is held back by Big Hill 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 3,902 ft along its crest , built across BIG HILL CK in Labette County , near CHERRYVALE . It was completed in 1981 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00049 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/BIGH, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Big Hill Lake →

Cedar Bluff Reservoir

USGS · reading Aug 31, 2026, 3:00 AM (UTC-05:00) Provisional

Pool elevation
2,119.11 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
55,060 acre-ft
Recent trend
↓Falling

−0.4 ft over the trend window

2119.9ft2119.1ftJun 2 – Aug 31

Cedar Bluff Reservoir is held back by Cedar Bluff Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 202 ft high and running 12,560 ft along its crest , built across SMOKY HILL RIVER in Trego County , near SCHOENCHEN . It was completed in 1951 , and is owned by BUREAU OF RECLAMATION , to a design credited to BUREAU OF RECLAMATION. 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 KS00019 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06861500, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Cedar Bluff Reservoir →

Cheney Reservoir

USGS · reading Aug 31, 2026, 2:00 AM (UTC-05:00) Provisional

Pool elevation
1,420.74 ft

Datum NGVD29

% of conservation pool full
94.1%
Storage
159,000 acre-ft
Recent trend
↓Falling

−0.9 ft over the trend window

1425.7ft1420.7ftJun 3 – Aug 31

Cheney Reservoir is held back by Cheney Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 126 ft high and running 24,458 ft along its crest , built across NORTH FORK NINNESCAH in Sedgwick County , near CHENEY . It was completed in 1965 , and is owned by BUREAU OF RECLAMATION , to a design credited to BUREAU OF RECLAMATION. 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 KS00017 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 07144790 · USACE SWT/CHEN, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Cheney Reservoir →

Clinton Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
876.27 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
124,400 acre-ft
Recent trend
↓Falling

−0.4 ft over the trend window

881.5ft876.2ftJun 2 – Aug 31

Clinton Lake is held back by Clinton Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 116 ft high and running 9,250 ft along its crest , built across WAKARUSA RIVER in Douglas County , near EUDORA . It was completed in 1977 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00026 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06891478 · USACE SWT/CLND, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Clinton Lake →

Council Grove Lake

USACE · reading Aug 31, 2026, 8:00 AM (UTC+00:00)

Pool elevation
1,273.83 ft

Datum NGVD29

% of conservation pool full
98.8%
Storage
42,038 acre-ft
Recent trend
↑Rising

+4.0 ft over the trend window

1280.1ft1275.1ftJun 2 – Jun 23

Council Grove Lake is held back by Council Grove Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 105 ft high and running 6,500 ft along its crest , built across GRAND NEOSHO RIVER in Morris County , near COUNCIL GROVE . It was completed in 1964 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00001 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/COUN, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Council Grove Lake →

El Dorado Lake

USACE · reading Aug 31, 2026, 7:00 AM (UTC+00:00)

Pool elevation
1,338.23 ft

Datum NGVD29

% of conservation pool full
95.9%
Storage
144,544 acre-ft
Recent trend
↑Rising

+0.5 ft over the trend window

1339.4ft1338.9ftJun 2 – Jun 23

El Dorado Lake is held back by El Dorado Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 99 ft high and running 20,930 ft along its crest , built across WALNUT RIVER in Butler County , near EL DORADO . It was completed in 1981 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00027 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/ELDR, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for El Dorado Lake →

Elk City Lake

USACE · reading Aug 31, 2026, 8:00 AM (UTC+00:00)

Pool elevation
795.43 ft

Datum NGVD29

% of conservation pool full
94%
Storage
32,328 acre-ft
Recent trend
↑Rising

+3.9 ft over the trend window

800.7ft796.4ftJun 2 – Jun 23

Elk City Lake is held back by Elk City Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 107 ft high and running 4,840 ft along its crest , built across ELK RIVER in Montgomery County , near INDEPENDENCE . It was completed in 1966 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00002 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/ELKC, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Elk City Lake →

Fall River Lake

USACE · reading Aug 31, 2026, 8:00 AM (UTC+00:00)

Pool elevation
948.78 ft

Datum NGVD29

% of conservation pool full
100%
Storage
21,287 acre-ft
Recent trend
↑Rising

+1.3 ft over the trend window

951.2ft949.1ftJun 2 – Jun 23

Fall River Lake is held back by Fall River Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 94 ft high and running 6,015 ft along its crest , built across FALL RIVER in Greenwood County , near FALL RIVER . It was completed in 1948 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00003 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/FALL, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Fall River Lake →

Hillsdale Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
917.08 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
77,810 acre-ft
Recent trend
↓Falling

−0.6 ft over the trend window

920.3ft917.1ftJun 2 – Aug 31

Hillsdale Lake is held back by Hillsdale Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 105 ft high and running 11,640 ft along its crest , built across BIG BULL CREEK in Miami County , near PAOLA . It was completed in 1981 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS82201 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06914995, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Hillsdale Lake →

Horsethief Reservoir

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
2,420.47 ft

Datum NAVD88

% of conservation pool full
Not reported
Storage
5,547 acre-ft
Recent trend
↓Falling

−1.0 ft over the trend window

2423.8ft2420.5ftJun 2 – Aug 31

Horsethief Reservoir is held back by Mpd No. 4-10 (Horsethief Reservoir) , 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 7,210 ft along its crest , built across BUCKNER CREEK in Hodgeman County , near JETMORE . It was completed in 2009 , and is owned by PAWNEE WJD NO 81 , to a design credited to KLA ENVIRONMENTAL SERVICES, INC;URS CORPORATION;URS CORPORATION. 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. 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 fair: sound under normal loading, though a rare or extreme event could expose a deficiency. National Inventory of Dams record KS09334 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 07140885, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Horsethief Reservoir →

John Redmond Lake

USACE · reading Aug 31, 2026, 7:00 AM (UTC+00:00)

Pool elevation
1,041.07 ft

Datum NGVD29

% of conservation pool full
100%
Storage
58,902 acre-ft
Recent trend
↑Rising

+7.8 ft over the trend window

1054.1ft1044.7ftJun 2 – Jun 23

John Redmond Lake is held back by John Redmond Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 87 ft high and running 21,790 ft along its crest , built across GRAND NEOSHO RIVER in Coffey County , near BURLINGTON . It was completed in 1964 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00004 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/JOHN, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for John Redmond Lake →

Kanopolis Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
1,465.38 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
55,610 acre-ft
Recent trend
↓Falling

−1.6 ft over the trend window

1471.7ft1465.4ftJun 2 – Aug 31

Kanopolis Lake is held back by Kanopolis Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 131 ft high and running 15,360 ft along its crest , built across SMOKY HILL RIVER in Ellsworth County , near MARQUETTE . It was completed in 1948 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00005 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06865000 · USACE SWT/KANO, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Kanopolis Lake →

Marion Lake

USACE · reading Aug 31, 2026, 8:00 AM (UTC+00:00)

Pool elevation
1,350.20 ft

Datum NAVD88

% of conservation pool full
97.5%
Storage
74,896 acre-ft
Recent trend
↑Rising

+0.5 ft over the trend window

1350.7ft1350.1ftJun 2 – Jun 23

Marion Lake is held back by Marion Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 67 ft high and running 8,375 ft along its crest , built across COTTONWOOD RIVER in Marion County , near MARION . It was completed in 1968 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00006 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/MARI, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Marion Lake →

Melvern Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
1,036.12 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
150,500 acre-ft
Recent trend
↓Falling

−0.4 ft over the trend window

1039.6ft1036.1ftJun 2 – Aug 31

Melvern Lake is held back by Melvern Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 123 ft high and running 9,750 ft along its crest , built across MARAIS DES CYGNES in Osage County , near MELVERN . It was completed in 1972 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00007 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06910997 · USACE SWT/MELN, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Melvern Lake →

Milford Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
1,146.25 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
404,900 acre-ft
Recent trend
↓Falling

−0.1 ft over the trend window

1148.5ft1145.1ftJun 2 – Aug 31

Milford Lake is held back by Milford Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 147 ft high and running 6,300 ft along its crest , built across REPUBLICAN RIVER in Geary County , near JUNCTION CITY . It was completed in 1966 , and is owned by USACE - Kansas City 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 KS00008 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06857050 · USACE SWT/MILD, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Milford Lake →

Perry Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
893.79 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
224,900 acre-ft
Recent trend
↓Falling

−0.9 ft over the trend window

902.5ft893.8ftJun 2 – Aug 31

Perry Lake is held back by Perry Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 121 ft high and running 1,740 ft along its crest , built across DELAWARE RIVER in Jefferson County , near PERRY . It was completed in 1966 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00009 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06890898, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Perry Lake →

Pomona Lake

USGS · reading Aug 31, 2026, 2:45 AM (UTC-05:00) Provisional

Pool elevation
974.21 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
56,350 acre-ft
Recent trend
↓Falling

−0.8 ft over the trend window

980.8ft974.2ftJun 2 – Aug 31

Pomona Lake is held back by Pomona Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 111 ft high and running 7,750 ft along its crest , built across HUNDRED TEN MILE CREEK in Osage County , near OTTAWA . It was completed in 1963 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00010 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06912490, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Pomona Lake →

Toronto Lake

USACE · reading Aug 31, 2026, 7:00 AM (UTC+00:00)

Pool elevation
902.04 ft

Datum NGVD29

% of conservation pool full
100%
Storage
16,725 acre-ft
Recent trend
↑Rising

+2.4 ft over the trend window

910.8ft902.8ftJun 2 – Jun 23

Toronto Lake is held back by Toronto Dam , a concrete gravity structure, resisting the reservoir by its own weight alone , standing 90 ft high and running 4,712 ft along its crest , built across VERDIGRIS RIVER in Woodson County , near COYVILLE . It was completed in 1960 , and is owned by USACE - Tulsa District , to a design credited to CESWT. 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 KS00011 — U.S. Army Corps of Engineers, public domain.

Source: USACE SWT/TORO, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Toronto Lake →

Tuttle C Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
1,079.10 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
305,600 acre-ft
Recent trend
↓Falling

−2.7 ft over the trend window

1095.1ft1079.0ftJun 2 – Aug 31

Tuttle C Lake is held back by Tuttle Creek Dam , a rockfill embankment — quarried rock placed in compacted layers around a sealing core , standing 157 ft high and running 7,500 ft along its crest , built across BIG BLUE RIVER in Pottawatomie County , near MANHATTAN . It was completed in 1960 , and is owned by USACE - Kansas City 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 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 KS00012 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06886900 · USACE SWT/TUCR, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Tuttle C Lake →

Wilson Lake

USGS · reading Aug 31, 2026, 2:30 AM (UTC-05:00) Provisional

Pool elevation
1,511.37 ft

Datum NGVD29

% of conservation pool full
Not reported
Storage
197,800 acre-ft
Recent trend
↓Falling

−0.4 ft over the trend window

1512.1ft1510.8ftJun 2 – Aug 31

Wilson Lake is held back by Wilson Dam , an earthfill embankment, holding the pool back by sheer mass and an impervious core rather than by the strength of concrete , standing 152 ft high and running 5,600 ft along its crest , built across SALINE RIVER in Russell County , near SYLVAN GROVE . It was completed in 1964 , and is owned by USACE - Kansas City District , to a design credited to CENWK. 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 KS00013 — U.S. Army Corps of Engineers, public domain.

Source: USGS site 06868100 · USACE SWT/WILN, retrieved Aug 31, 2026, 8:24 AM (UTC+00:00). Official page for Wilson Lake →

Frequently asked questions

How many lakes and reservoirs in Kansas are tracked here?
20, of which 20 report a current pool-elevation reading. The rest report storage only, or lack a fresh reading and are not published.
Which Kansas lakes report a %-full figure?
9 of Kansas's lakes have a real, source-provided %-of-conservation-pool-full figure (from USACE); the rest show the bare level because their source does not publish that comparison.
Where does the data come from?
USGS Water Services and USACE CWMS Data, both public domain. See the methodology page for the exact endpoints and update cadence.

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