Lake water level report
Ada - 11025000
Cass County
Water Level Data
Period of record: 06/10/1941 to 04/30/2025
# of readings: 3044
Highest recorded: 1326.12 ft (06/14/1943)
Lowest recorded: 1323.25 ft (09/04/2004)
Recorded range: 2.87 ft
Last reading: 1324.97 ft (04/30/2025)
Ordinary High Water Level (OHW) elevation: 1325.3 ft
Datum: NGVD 29 (ft)
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Last 10 years of data, click to enlarge.
Benchmarks
| Elevation: 1328.56 ft | Datum: NGVD 29 (ft) |
| Date Set: 09/16/1992 | Location: T139R29S22 |
| Description: Found 2025. Vertical 3/8" x 8" spk in notched north root of a 1.6' red pine, 22' from water edge, 60' east of boat ramp, at public access off Spring Beach Dr NW, on NE bay of lake. | |
| Elevation: 1332.8 ft | Datum: NGVD 29 (ft) |
| Date Set: 09/16/1992 | Location: T139R29S22 |
| Description: In-place bent 60d spike in West root of a 1.4' oak, on slope, approx. 80' North of water edge and 10' East of east edge of concrete boat ramp, at public access, off Spring Beach Dr NW, Backus, on NE side of lake. | |