2026 Water Level Readings. See Chart Below for Current Info.
Notes:
Lake Augusta is approximately 3-5 inches (0.2 – 0.3 ft) above Clearwater Lake, depending on water flow, and any recent rainfall.
The High Water/No Wake restrictions kick-in when the Grass Lake Dam reaches 992.1 Ft or above. This applies to Clearwater Lake & Lake Augusta. The Lake Augusta High Water/No Wake Restrictions kick in when the reading are 991.9 ft. or above. This will be noted in the chart above.
The Clearwater River Watershed District (CRWD) watches the lake level near the dam on Grass Lake because a DNR permit requires the watershed to close the outlet at Pleasant Lake when the elevation at Clearwater Lake reaches 992.13′. This is called the “cutoff” elevation. We can have a good estimate at what the Clearwater Lake elevation is based on the info at Grass Lake since they are connected by a channel.
The water level at the Grass Lake Dam site is monitored continuously from approximately May to October each year. We use a device called a pressure transducer which is hooked up to an antenna and this sends us the data once per hour. We also have a staff gauge (a fancy term for a ruler) attached to the dam where we can verify that the information we are getting from the transducer is accurate.
The Ordinary High Water level (OHW) on Clearwater Lake is 991.3′ and on Grass Lake is 990.9′. The OHW is defined as a location around the lake where there is a change in soil and vegetation that shows us where the water usually meets the land. The highest recorded water level on Clearwater Lake was 996′ and Grass, it was 995.23′. These both occurred on 6/27/1983.
| 2026 Date | Lake Augusta (Feet above Sea Level) | Clearwater Lake (Feet Above Sea Level) | Grass Lake Dam (Feet Above Sea Level) | Precipitation (Inches) | High Water/ No Wake |
| 5-28 | 991.27 | No | |||
| 6-18 | 991.49 | 991.19 | No | ||
| 6-21 | 991.5 | 991.19 | No | ||
| 6-23 | 991.64 | 991.19 | 0.97 | No | |
| 6-25 | 991.27 | 0.0 | No | ||