Reservoir · Montana · United States · USACE CWMS
Fort Peck Dam & Reservoir
83.1% full
Capacity
18,995.62 hm³
Volume stored
15790 hm³
Coordinates
48.001°N, 106.418°W
Last updated
2026-07-29
Current fill
83.1%vs 7 days ago
-0.1%losing
vs 1 year ago
+0.9%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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.001, -106.418 · Open in Google Maps
About Fort Peck Dam & Reservoir
As of July 29, 2026, Fort Peck Dam & Reservoir is filled to 83.1% of its total capacity, holding roughly 15,790 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 (-0.1 pts), 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 July 31, 2021 and July 29, 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 August and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It lies within the Montana basin at 48.001°N, 106.418°W.
Key facts
- Current fill level
- 83.1%
- Water stored
- 15,790 hm³
- Total capacity
- 18,996 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 0.9 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- USACE
- Coordinates
- 48.001°N, 106.418°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 83.1% | 15,790 |
| 28 Jul 2026 | 83.2% | 15,796 |
| 27 Jul 2026 | 83.2% | 15,802 |
| 26 Jul 2026 | 83.2% | 15,811 |
| 25 Jul 2026 | 83.3% | 15,814 |
| 24 Jul 2026 | 83.3% | 15,818 |
| 23 Jul 2026 | 83.3% | 15,819 |
| 22 Jul 2026 | 83.3% | 15,824 |
| 21 Jul 2026 | 83.4% | 15,837 |
| 20 Jul 2026 | 83.4% | 15,842 |
| 19 Jul 2026 | 83.4% | 15,844 |
| 18 Jul 2026 | 83.4% | 15,845 |
Frequently asked questions
What is the current water level of Fort Peck Dam & Reservoir?
As of July 29, 2026, Fort Peck Dam & Reservoir is at 83.1% of its capacity, holding approximately 15,790 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Fort Peck Dam & Reservoir reservoir full?
No. As of July 29, 2026, Fort Peck Dam & Reservoir is high at 83.1% of its capacity, so it is not full.
Is the water level at Fort Peck Dam & Reservoir rising or falling?
The level at Fort Peck Dam & Reservoir has been broadly stable over the latest week on record (-0.1 points).
How much water can Fort Peck Dam & Reservoir hold?
Fort Peck Dam & Reservoir has a total capacity of 18,996 hm³.
Where is Fort Peck Dam & Reservoir reservoir located?
Fort Peck Dam & Reservoir is located in Montana, United States, within the Montana basin (coordinates 48.001°N, 106.418°W).
What is Fort Peck Dam & Reservoir used for?
Fort Peck Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.