Reservoir · Montana · United States · BOR RISE
Gibson Reservoir and Dam
99.4% full
Capacity
122.19 hm³
Volume stored
122 hm³
Coordinates
47.601°N, 112.762°W
Last updated
2026-06-10
Current fill
99.4%vs 7 days ago
+0.2%gaining
vs 1 year ago
+19.1%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-06-10.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.601, -112.762 · Open in Google Maps
About Gibson Reservoir and Dam
As of June 10, 2026, Gibson Reservoir and Dam is filled to 99.4% of its total capacity, holding roughly 122 hm³ of water out of a maximum 122 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 19.1 points above its level on the same date a year earlier.
Across the readings we hold for Gibson Reservoir and Dam — 1891 data points between June 13, 2021 and June 10, 2026 — the level has ranged from a low of 4.7% (February 14, 2025) to a high of 99.7% (June 15, 2021). On average the reservoir is fullest around June and at its lowest around September.
It is operated by BOR primarily for multiple purposes. It lies within the Montana basin at 47.601°N, 112.762°W.
Key facts
- Current fill level
- 99.4%
- Water stored
- 122 hm³
- Total capacity
- 122 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 19.1 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 47.601°N, 112.762°W
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 99.4% | 121 |
| 9 Jun 2026 | 99.2% | 121 |
| 8 Jun 2026 | 98.9% | 121 |
| 7 Jun 2026 | 98.9% | 121 |
| 6 Jun 2026 | 98.9% | 121 |
| 5 Jun 2026 | 98.7% | 121 |
| 4 Jun 2026 | 98.4% | 120 |
| 3 Jun 2026 | 97.9% | 120 |
| 2 Jun 2026 | 97.7% | 119 |
| 1 Jun 2026 | 97.5% | 119 |
| 31 May 2026 | 96.9% | 118 |
| 30 May 2026 | 96.3% | 118 |
Frequently asked questions
What is the current water level of Gibson Reservoir and Dam?
As of June 10, 2026, Gibson Reservoir and Dam is at 99.4% of its capacity, holding approximately 122 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Gibson Reservoir and Dam reservoir full?
Gibson Reservoir and Dam is essentially full, sitting at 99.4% of capacity as of June 10, 2026.
Is the water level at Gibson Reservoir and Dam rising or falling?
The level at Gibson Reservoir and Dam has been broadly stable over the latest week on record (+0.2 points).
How much water can Gibson Reservoir and Dam hold?
Gibson Reservoir and Dam has a total capacity of 122 hm³.
Where is Gibson Reservoir and Dam reservoir located?
Gibson Reservoir and Dam is located in Montana, United States, within the Montana basin (coordinates 47.601°N, 112.762°W).
What is Gibson Reservoir and Dam used for?
Gibson Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.