Reservoir · North Dakota · United States · BOR RISE
Lake Tschida and Heart Butte Dam
46.4% full
Capacity
135.47 hm³
Volume stored
63 hm³
Coordinates
46.597°N, 101.809°W
Last updated
2026-07-28
Current fill
46.4%vs 7 days ago
-0.2%losing
vs 1 year ago
-7.8%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.597, -101.809 · Open in Google Maps
About Lake Tschida and Heart Butte Dam
As of July 28, 2026, Lake Tschida and Heart Butte Dam is filled to 46.4% of its total capacity, holding roughly 63 hm³ of water out of a maximum 135 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.2 pts), and it is 7.8 points below its level on the same date a year earlier.
Across the readings we hold for Lake Tschida and Heart Butte Dam — 1819 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 38.5% (October 6, 2021) to a high of 100.0% (April 15, 2023). On average the reservoir is fullest around May and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the North Dakota basin at 46.597°N, 101.809°W.
Key facts
- Current fill level
- 46.4%
- Water stored
- 63 hm³
- Total capacity
- 135 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 7.8 pts
- Primary use
- Multipurpose
- River basin
- North Dakota
- Operator
- BOR
- Coordinates
- 46.597°N, 101.809°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 46.4% | 63 |
| 27 Jul 2026 | 46.6% | 63 |
| 26 Jul 2026 | 46.8% | 63 |
| 25 Jul 2026 | 47.0% | 64 |
| 24 Jul 2026 | 47.2% | 64 |
| 23 Jul 2026 | 47.4% | 64 |
| 22 Jul 2026 | 47.6% | 64 |
| 21 Jul 2026 | 47.8% | 65 |
| 20 Jul 2026 | 48.0% | 65 |
| 19 Jul 2026 | 48.2% | 65 |
| 18 Jul 2026 | 48.4% | 66 |
| 17 Jul 2026 | 48.6% | 66 |
Frequently asked questions
What is the current water level of Lake Tschida and Heart Butte Dam?
As of July 28, 2026, Lake Tschida and Heart Butte Dam is at 46.4% of its capacity, holding approximately 63 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Tschida and Heart Butte Dam reservoir full?
No. As of July 28, 2026, Lake Tschida and Heart Butte Dam is within its normal operating range at 46.4% of its capacity, so it is not full.
Is the water level at Lake Tschida and Heart Butte Dam rising or falling?
The level at Lake Tschida and Heart Butte Dam has been broadly stable over the latest week on record (-0.2 points).
How much water can Lake Tschida and Heart Butte Dam hold?
Lake Tschida and Heart Butte Dam has a total capacity of 135 hm³.
Where is Lake Tschida and Heart Butte Dam reservoir located?
Lake Tschida and Heart Butte Dam is located in North Dakota, United States, within the North Dakota basin (coordinates 46.597°N, 101.809°W).
What is Lake Tschida and Heart Butte Dam used for?
Lake Tschida and Heart Butte Dam is used primarily for multiple purposes, and is managed by BOR.