Reservoir · Oregon · United States · BOR RISE
Prineville Reservoir and Arthur R. Bowman Dam
34.4% full
Capacity
185.29 hm³
Volume stored
64 hm³
Coordinates
44.111°N, 120.787°W
Last updated
2026-08-12
Current fill
34.4%vs 7 days ago
-2.5%losing
vs 1 year ago
-36.6%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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 44.111, -120.787 · Open in Google Maps
About Prineville Reservoir and Arthur R. Bowman Dam
As of August 12, 2026, Prineville Reservoir and Arthur R. Bowman Dam is filled to 34.4% of its total capacity, holding roughly 64 hm³ of water out of a maximum 185 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 2.5 percentage points, and it is 36.6 points below its level on the same date a year earlier.
Across the readings we hold for Prineville Reservoir and Arthur R. Bowman Dam — 2189 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 9.3% (December 19, 2022) to a high of 100.2% (May 16, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Oregon basin at 44.111°N, 120.787°W.
Key facts
- Current fill level
- 34.4%
- Water stored
- 64 hm³
- Total capacity
- 185 hm³
- 7-day change
- ▼ 2.5 pts
- Year-on-year
- ▼ 36.6 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 44.111°N, 120.787°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 34.4% | 64 |
| 11 Aug 2026 | 34.8% | 64 |
| 10 Aug 2026 | 35.1% | 65 |
| 9 Aug 2026 | 35.5% | 66 |
| 8 Aug 2026 | 35.8% | 66 |
| 7 Aug 2026 | 36.2% | 67 |
| 6 Aug 2026 | 36.5% | 68 |
| 5 Aug 2026 | 36.9% | 68 |
| 4 Aug 2026 | 37.2% | 69 |
| 3 Aug 2026 | 37.6% | 70 |
| 2 Aug 2026 | 37.9% | 70 |
| 1 Aug 2026 | 38.3% | 71 |
Frequently asked questions
What is the current water level of Prineville Reservoir and Arthur R. Bowman Dam?
As of August 12, 2026, Prineville Reservoir and Arthur R. Bowman Dam is at 34.4% of its capacity, holding approximately 64 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Prineville Reservoir and Arthur R. Bowman Dam reservoir full?
No. As of August 12, 2026, Prineville Reservoir and Arthur R. Bowman Dam is low at 34.4% of its capacity, so it is not full.
Is the water level at Prineville Reservoir and Arthur R. Bowman Dam rising or falling?
The level at Prineville Reservoir and Arthur R. Bowman Dam is falling — it dropped 2.5 percentage points over the latest week on record.
How much water can Prineville Reservoir and Arthur R. Bowman Dam hold?
Prineville Reservoir and Arthur R. Bowman Dam has a total capacity of 185 hm³.
Where is Prineville Reservoir and Arthur R. Bowman Dam reservoir located?
Prineville Reservoir and Arthur R. Bowman Dam is located in Oregon, United States, within the Oregon basin (coordinates 44.111°N, 120.787°W).
What is Prineville Reservoir and Arthur R. Bowman Dam used for?
Prineville Reservoir and Arthur R. Bowman Dam is used primarily for multiple purposes, and is managed by BOR.