Reservoir · North Dakota · United States · USACE CWMS
Heart Butte Dam & Reservoir
27.2% full
Capacity
268.64 hm³
Volume stored
73 hm³
Coordinates
46.598°N, 101.810°W
Last updated
2026-06-11
Current fill
27.2%vs 7 days ago
-0.1%losing
vs 1 year ago
-1.3%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.598, -101.810 · Open in Google Maps
About Heart Butte Dam & Reservoir
As of June 11, 2026, Heart Butte Dam & Reservoir is filled to 27.2% of its total capacity, holding roughly 73 hm³ of water out of a maximum 269 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 1.3 points below its level on the same date a year earlier.
Across the readings we hold for Heart Butte Dam & Reservoir — 1825 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 19.8% (October 5, 2021) to a high of 100.0% (December 29, 2025). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It lies within the North Dakota basin at 46.598°N, 101.810°W.
Key facts
- Current fill level
- 27.2%
- Water stored
- 73 hm³
- Total capacity
- 269 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 1.3 pts
- Primary use
- Multipurpose
- River basin
- North Dakota
- Operator
- USACE
- Coordinates
- 46.598°N, 101.810°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 27.2% | 73 |
| 10 Jun 2026 | 27.3% | 73 |
| 9 Jun 2026 | 27.3% | 73 |
| 8 Jun 2026 | 27.5% | 74 |
| 7 Jun 2026 | 27.4% | 73 |
| 6 Jun 2026 | 27.5% | 74 |
| 5 Jun 2026 | 27.5% | 74 |
| 4 Jun 2026 | 27.6% | 74 |
| 3 Jun 2026 | 27.7% | 74 |
| 2 Jun 2026 | 27.7% | 74 |
| 1 Jun 2026 | 27.7% | 75 |
| 31 May 2026 | 27.7% | 75 |
Frequently asked questions
What is the current water level of Heart Butte Dam & Reservoir?
As of June 11, 2026, Heart Butte Dam & Reservoir is at 27.2% of its capacity, holding approximately 73 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Heart Butte Dam & Reservoir reservoir full?
No. As of June 11, 2026, Heart Butte Dam & Reservoir is low at 27.2% of its capacity, so it is not full.
Is the water level at Heart Butte Dam & Reservoir rising or falling?
The level at Heart Butte Dam & Reservoir has been broadly stable over the latest week on record (-0.1 points).
How much water can Heart Butte Dam & Reservoir hold?
Heart Butte Dam & Reservoir has a total capacity of 269 hm³.
Where is Heart Butte Dam & Reservoir reservoir located?
Heart Butte Dam & Reservoir is located in North Dakota, United States, within the North Dakota basin (coordinates 46.598°N, 101.810°W).
What is Heart Butte Dam & Reservoir used for?
Heart Butte Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.