Reservoir · Montana · United States · BOR RISE
Bighorn River and BIA Canal near St. Xavier
70.7% full
Capacity
3.55 hm³
Volume stored
3 hm³
Coordinates
45.317°N, 107.918°W
Last updated
2026-07-28
Current fill
70.7%vs 7 days ago
-18.0%losing
vs 1 year ago
-16.9%year-over-year
7-day trend
↓falling
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. 45.317, -107.918 · Open in Google Maps
About Bighorn River and BIA Canal near St. Xavier
As of July 28, 2026, Bighorn River and BIA Canal near St. Xavier is filled to 70.7% of its total capacity, holding roughly 3 hm³ of water out of a maximum 4 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 18.0 percentage points, and it is 16.9 points below its level on the same date a year earlier.
Across the readings we hold for Bighorn River and BIA Canal near St. Xavier — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 18.0% (September 13, 2023) to a high of 96.9% (July 19, 2026). On average the reservoir is fullest around July and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Montana basin at 45.317°N, 107.918°W.
Key facts
- Current fill level
- 70.7%
- Water stored
- 3 hm³
- Total capacity
- 4 hm³
- 7-day change
- ▼ 18.0 pts
- Year-on-year
- ▼ 16.9 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- BOR
- Coordinates
- 45.317°N, 107.918°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 70.7% | 3 |
| 27 Jul 2026 | 88.7% | 3 |
| 26 Jul 2026 | 96.1% | 3 |
| 25 Jul 2026 | 90.4% | 3 |
| 24 Jul 2026 | 91.0% | 3 |
| 23 Jul 2026 | 90.4% | 3 |
| 22 Jul 2026 | 83.1% | 3 |
| 21 Jul 2026 | 86.8% | 3 |
| 20 Jul 2026 | 96.1% | 3 |
| 19 Jul 2026 | 96.9% | 3 |
| 18 Jul 2026 | 94.9% | 3 |
| 17 Jul 2026 | 87.9% | 3 |
Frequently asked questions
What is the current water level of Bighorn River and BIA Canal near St. Xavier?
As of July 28, 2026, Bighorn River and BIA Canal near St. Xavier is at 70.7% of its capacity, holding approximately 3 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Bighorn River and BIA Canal near St. Xavier reservoir full?
No. As of July 28, 2026, Bighorn River and BIA Canal near St. Xavier is within its normal operating range at 70.7% of its capacity, so it is not full.
Is the water level at Bighorn River and BIA Canal near St. Xavier rising or falling?
The level at Bighorn River and BIA Canal near St. Xavier is falling — it dropped 18.0 percentage points over the latest week on record.
How much water can Bighorn River and BIA Canal near St. Xavier hold?
Bighorn River and BIA Canal near St. Xavier has a total capacity of 4 hm³.
Where is Bighorn River and BIA Canal near St. Xavier reservoir located?
Bighorn River and BIA Canal near St. Xavier is located in Montana, United States, within the Montana basin (coordinates 45.317°N, 107.918°W).
What is Bighorn River and BIA Canal near St. Xavier used for?
Bighorn River and BIA Canal near St. Xavier is used primarily for multiple purposes, and is managed by BOR.