Reservoir · Montana · United States · BOR RISE
Lake Sherburne and Dam
87.9% full
Capacity
83.7 hm³
Volume stored
74 hm³
Coordinates
48.828°N, 113.521°W
Last updated
2026-07-28
Current fill
87.9%vs 7 days ago
-1.2%losing
vs 1 year ago
-1.6%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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.828, -113.521 · Open in Google Maps
About Lake Sherburne and Dam
As of July 28, 2026, Lake Sherburne and Dam is filled to 87.9% of its total capacity, holding roughly 74 hm³ of water out of a maximum 84 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-1.2 pts), and it is 1.6 points below its level on the same date a year earlier.
Across the readings we hold for Lake Sherburne and Dam — 1855 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 14.0% (September 15, 2021) to a high of 97.8% (June 29, 2026). On average the reservoir is fullest around July and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Montana basin at 48.828°N, 113.521°W.
Key facts
- Current fill level
- 87.9%
- Water stored
- 74 hm³
- Total capacity
- 84 hm³
- 7-day change
- ▼ 1.2 pts
- Year-on-year
- ▼ 1.6 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 48.828°N, 113.521°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 87.9% | 74 |
| 27 Jul 2026 | 89.1% | 75 |
| 26 Jul 2026 | 90.2% | 76 |
| 25 Jul 2026 | 91.2% | 76 |
| 24 Jul 2026 | 92.1% | 77 |
| 23 Jul 2026 | 93.1% | 78 |
| 22 Jul 2026 | 94.1% | 79 |
| 21 Jul 2026 | 94.9% | 79 |
| 20 Jul 2026 | 95.7% | 80 |
| 19 Jul 2026 | 96.3% | 81 |
| 18 Jul 2026 | 96.8% | 81 |
| 17 Jul 2026 | 97.1% | 81 |
Frequently asked questions
What is the current water level of Lake Sherburne and Dam?
As of July 28, 2026, Lake Sherburne and Dam is at 87.9% of its capacity, holding approximately 74 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Sherburne and Dam reservoir full?
No. As of July 28, 2026, Lake Sherburne and Dam is high at 87.9% of its capacity, so it is not full.
Is the water level at Lake Sherburne and Dam rising or falling?
The level at Lake Sherburne and Dam has been broadly stable over the latest week on record (-1.2 points).
How much water can Lake Sherburne and Dam hold?
Lake Sherburne and Dam has a total capacity of 84 hm³.
Where is Lake Sherburne and Dam reservoir located?
Lake Sherburne and Dam is located in Montana, United States, within the Montana basin (coordinates 48.828°N, 113.521°W).
What is Lake Sherburne and Dam used for?
Lake Sherburne and Dam is used primarily for multiple purposes, and is managed by BOR.