Reservoir · Utah · United States · BOR RISE
Willard Bay Reservoir and Arthur V Watkins Dam
50.2% full
Capacity
265.82 hm³
Volume stored
133 hm³
Coordinates
41.377°N, 112.083°W
Last updated
2026-07-28
Current fill
50.2%vs 7 days ago
0.0%stable
vs 1 year ago
-3.1%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: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.377, -112.083 · Open in Google Maps
About Willard Bay Reservoir and Arthur V Watkins Dam
As of July 28, 2026, Willard Bay Reservoir and Arthur V Watkins Dam is filled to 50.2% of its total capacity, holding roughly 133 hm³ of water out of a maximum 266 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 3.1 points below its level on the same date a year earlier.
Across the readings we hold for Willard Bay Reservoir and Arthur V Watkins Dam — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 31.8% (November 23, 2022) to a high of 102.7% (June 27, 2023). On average the reservoir is fullest around May and at its lowest around December.
It is operated by BOR primarily for multiple purposes. It lies within the Utah basin at 41.377°N, 112.083°W.
Key facts
- Current fill level
- 50.2%
- Water stored
- 133 hm³
- Total capacity
- 266 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 3.1 pts
- Primary use
- Multipurpose
- River basin
- Utah
- Operator
- BOR
- Coordinates
- 41.377°N, 112.083°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 50.2% | 133 |
| 27 Jul 2026 | 50.2% | 133 |
| 26 Jul 2026 | 50.3% | 134 |
| 25 Jul 2026 | 50.5% | 134 |
| 24 Jul 2026 | 50.4% | 134 |
| 23 Jul 2026 | 50.5% | 134 |
| 22 Jul 2026 | 50.5% | 134 |
| 21 Jul 2026 | 50.5% | 134 |
| 20 Jul 2026 | 50.6% | 135 |
| 19 Jul 2026 | 50.6% | 135 |
| 18 Jul 2026 | 50.7% | 135 |
| 17 Jul 2026 | 50.7% | 135 |
Frequently asked questions
What is the current water level of Willard Bay Reservoir and Arthur V Watkins Dam?
As of July 28, 2026, Willard Bay Reservoir and Arthur V Watkins Dam is at 50.2% of its capacity, holding approximately 133 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Willard Bay Reservoir and Arthur V Watkins Dam reservoir full?
No. As of July 28, 2026, Willard Bay Reservoir and Arthur V Watkins Dam is within its normal operating range at 50.2% of its capacity, so it is not full.
Is the water level at Willard Bay Reservoir and Arthur V Watkins Dam rising or falling?
The level at Willard Bay Reservoir and Arthur V Watkins Dam has been broadly stable over the latest week on record (0.0 points).
How much water can Willard Bay Reservoir and Arthur V Watkins Dam hold?
Willard Bay Reservoir and Arthur V Watkins Dam has a total capacity of 266 hm³.
Where is Willard Bay Reservoir and Arthur V Watkins Dam reservoir located?
Willard Bay Reservoir and Arthur V Watkins Dam is located in Utah, United States, within the Utah basin (coordinates 41.377°N, 112.083°W).
What is Willard Bay Reservoir and Arthur V Watkins Dam used for?
Willard Bay Reservoir and Arthur V Watkins Dam is used primarily for multiple purposes, and is managed by BOR.