Reservoir · North Dakota · United States · BOR RISE
Lake Tschida
Lake Tschida and Heart Butte Dam
42.6% full
Capacity
135.47 hm³
Volume stored
58 hm³
Coordinates
46.597°N, 101.809°W
Last updated
2026-09-09
Current fill
42.6%vs 7 days ago
-0.2%losing
vs 1 year ago
-9.4%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: 2026-09-09.
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
As of September 9, 2026, Lake Tschida is filled to 42.6% of its total capacity, holding roughly 58 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 9.4 points below its level on the same date a year earlier.
Across the readings we hold for Lake Tschida — 1946 data points between September 12, 2021 and September 9, 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
- 42.6%
- Water stored
- 58 hm³
- Total capacity
- 135 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 9.4 pts
- Primary use
- Multipurpose
- River basin
- North Dakota
- Operator
- BOR
- Coordinates
- 46.597°N, 101.809°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 42.6% | 58 |
| 8 Sep 2026 | 42.8% | 58 |
| 7 Sep 2026 | 42.9% | 58 |
| 6 Sep 2026 | 42.9% | 58 |
| 5 Sep 2026 | 42.9% | 58 |
| 4 Sep 2026 | 42.8% | 58 |
| 3 Sep 2026 | 42.9% | 58 |
| 2 Sep 2026 | 42.8% | 58 |
| 1 Sep 2026 | 42.9% | 58 |
| 31 Aug 2026 | 42.9% | 58 |
| 30 Aug 2026 | 42.9% | 58 |
| 29 Aug 2026 | 42.8% | 58 |