Heart Butte Reservoir Water Level Today
North Dakota · near Mandan · Below full pool
- Elevation
- 2,057.57 ft
- From full pool
- −6.93 ft
- Percent of pool
- 79.9%
- 24-hour change
- −0.05 ft
- 7-day change
- −0.33 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Heart Butte Reservoir
Heart Butte Reservoir is 6.93 ft below full pool, at 2,057.57 ft, down 0.05 ft in the last 24 hours. That puts the lake at 79.9 percent of its conservation pool. The top of the flood pool is 36.9 ft higher, at 2,094.50 ft.
Over the last 7 days the level fell 0.33 ft, and over 30 days it fell 0.76 ft. In the 400 days of readings on this page the high was 2,064.68 ft on Feb 18, 2026 and the low was 2,057.59 ft on Sep 21, 2026, a range of 7.09 ft.
The reading is the U.S. Army Corps of Engineers gauge at Heart Butte Dam & Reservoir, near Mandan, taken Sep 21, 2026 and referenced to the LOCAL datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Heart Butte Reservoir pool elevations
| Current elevation | 2,057.57 ft |
|---|---|
| Full pool (top of conservation) | 2,064.50 ft |
| Top of flood pool | 2,094.50 ft |
| Bottom of conservation pool | 2,030.00 ft |
| Top of dam | 2,124.00 ft |
| Inflow | -14 cfs |
| Outflow | 0 cfs |
| 30-day change | −0.76 ft |
| 1-year high | 2,064.68 ft (Feb 18, 2026) |
| 1-year low | 2,057.59 ft (Sep 21, 2026) |
| Vertical datum | LOCAL |
| Operating agency | U.S. Army Corps of Engineers, NWO district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in North Dakota
- Lake Sakakawea 1,824.36 ft, −13.14 ft from full
- Bowman-Haley Reservoir 2,748.73 ft, −6.07 ft from full
- Jamestown Reservoir 1,430.00 ft, +2.00 ft from full
- Lake Audubon 1,846.54 ft, −0.46 ft from full
- Pipestem Reservoir 1,442.62 ft, +0.12 ft from full
Heart Butte Reservoir level questions
What is the water level of Heart Butte Reservoir today?
Heart Butte Reservoir is at 2,057.57 ft as of Sep 21, 2026, −6.93 ft relative to full pool (2,064.50 ft). The 24-hour change is −0.05 ft.
What is full pool at Heart Butte Reservoir?
Full pool, the top of the conservation pool, is 2,064.50 ft (LOCAL). Above that, water is stored temporarily in the flood pool up to 2,094.50 ft. The bottom of the conservation pool is 2,030.00 ft.
Is Heart Butte Reservoir rising or falling?
Over the last 24 hours the level is −0.05 ft; over 7 days it fell 0.33 ft, and over 30 days it fell 0.76 ft.
Where does this Heart Butte Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Heart Butte Dam & Reservoir. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.