Reservoir · North Dakota · United States · BOR RISE
Jamestown Dam and Reservoir
26.0% full
Capacity
131.68 hm³
Volume stored
34 hm³
Coordinates
46.931°N, 98.706°W
Last updated
2026-09-09
Current fill
26.0%vs 7 days ago
-0.7%losing
vs 1 year ago
-0.8%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: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.931, -98.706 · Open in Google Maps
About Jamestown Dam and Reservoir
As of September 9, 2026, Jamestown Dam and Reservoir is filled to 26.0% of its total capacity, holding roughly 34 hm³ of water out of a maximum 132 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.7 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Jamestown Dam and Reservoir — 1950 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 19.1% (October 6, 2021) to a high of 100.0% (May 20, 2023). On average the reservoir is fullest around May and at its lowest around December.
It is operated by BOR primarily for multiple purposes. It lies within the North Dakota basin at 46.931°N, 98.706°W.
Key facts
- Current fill level
- 26.0%
- Water stored
- 34 hm³
- Total capacity
- 132 hm³
- 7-day change
- ▼ 0.7 pts
- Year-on-year
- ▼ 0.8 pts
- Primary use
- Multipurpose
- River basin
- North Dakota
- Operator
- BOR
- Coordinates
- 46.931°N, 98.706°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 26.0% | 34 |
| 8 Sep 2026 | 26.1% | 34 |
| 7 Sep 2026 | 26.2% | 34 |
| 6 Sep 2026 | 26.3% | 35 |
| 5 Sep 2026 | 26.4% | 35 |
| 4 Sep 2026 | 26.5% | 35 |
| 3 Sep 2026 | 26.6% | 35 |
| 2 Sep 2026 | 26.7% | 35 |
| 1 Sep 2026 | 26.7% | 35 |
| 31 Aug 2026 | 26.8% | 35 |
| 30 Aug 2026 | 26.9% | 35 |
| 29 Aug 2026 | 26.9% | 35 |