Reservoir · Montana · United States · USACE CWMS
Pishkun Reservoir
40.8% full
Capacity
57.57 hm³
Volume stored
24 hm³
Coordinates
47.677°N, 112.497°W
Last updated
2026-10-01
Current fill
40.8%vs 7 days ago
0.0%stable
vs 1 year ago
-22.2%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-10-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.677, -112.497 · Open in Google Maps
About Pishkun Reservoir
As of October 1, 2026, Pishkun Reservoir is filled to 40.8% of its total capacity, holding roughly 24 hm³ of water out of a maximum 58 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 (+0.0 pts), and it is 22.2 points below its level on the same date a year earlier.
Across the readings we hold for Pishkun Reservoir — 1787 data points between October 2, 2021 and October 1, 2026 — the level has ranged from a low of 40.8% (September 24, 2026) to a high of 100.2% (July 3, 2026). On average the reservoir is fullest around June and at its lowest around March.
It is operated by USACE primarily for multiple purposes. It lies within the Montana basin at 47.677°N, 112.497°W.
Key facts
- Current fill level
- 40.8%
- Water stored
- 24 hm³
- Total capacity
- 58 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 22.2 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- USACE
- Coordinates
- 47.677°N, 112.497°W
- Last updated
- October 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Oct 2026 | 40.8% | 23 |
| 30 Sep 2026 | 40.8% | 23 |
| 29 Sep 2026 | 40.8% | 23 |
| 28 Sep 2026 | 40.8% | 23 |
| 27 Sep 2026 | 40.8% | 23 |
| 26 Sep 2026 | 40.8% | 23 |
| 25 Sep 2026 | 40.8% | 23 |
| 24 Sep 2026 | 40.8% | 23 |
| 23 Sep 2026 | 41.8% | 24 |
| 22 Sep 2026 | 50.9% | 29 |
| 21 Sep 2026 | 53.3% | 31 |
| 20 Sep 2026 | 55.4% | 32 |