Reservoir · Montana · United States · USACE CWMS
Fort Peck Dam & Reservoir
80.2% full
Capacity
18,995.62 hm³
Volume stored
15226 hm³
Vs month average
96% of normal
Coordinates
48.001°N, 106.418°W
Last updated
2026-10-27
Current fill
80.2%vs 7 days ago
-0.3 pplosing
vs 1 year ago
-0.9 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
96%of normal
80.2% full on 2026-10-27, against an average of 83.2% for October across 6 years of readings (-3.0 points).
Drought Monitor at this site · 20 October 2026
Nonenot in a drought category
Fort Peck Dam & Reservoir's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Montana drought figures →
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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.001°N, 106.418°W · Open in Google Maps
About Fort Peck Dam & Reservoir
As of October 27, 2026, Fort Peck Dam & Reservoir is filled to 80.2% of its total capacity, holding 15,226 hm³ of water out of a maximum 18,996 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.3 pp), and it sits close to where it was a year earlier.
Across the readings we hold for Fort Peck Dam & Reservoir — 1821 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 76.7% (March 2, 2023) to a high of 92.8% (May 27, 2024). On average the reservoir is fullest around July and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It is at 48.001°N, 106.418°W.
Key facts
- Current fill level
- 80.2% of total capacity
- Water stored
- 15,226 hm³
- Total capacity
- 18,996 hm³
- 7-day change
- ▼ 0.3 pp
- Year-on-year
- ▼ 0.9 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 48.001°N, 106.418°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 80.2% | 15,226 |
| 26 Oct 2026 | 80.2% | 15,241 |
| 25 Oct 2026 | 80.3% | 15,245 |
| 24 Oct 2026 | 80.3% | 15,254 |
| 23 Oct 2026 | 80.3% | 15,261 |
| 22 Oct 2026 | 80.4% | 15,263 |
| 21 Oct 2026 | 80.4% | 15,278 |
| 20 Oct 2026 | 80.5% | 15,290 |
| 19 Oct 2026 | 80.5% | 15,299 |
| 18 Oct 2026 | 80.6% | 15,304 |
| 17 Oct 2026 | 80.6% | 15,308 |
| 16 Oct 2026 | 80.6% | 15,311 |