Reservoir · Utah · United States · BOR RISE
Moon Lake Reservoir and Dam
19.3% full
Capacity
61.06 hm³
Volume stored
12 hm³
Coordinates
40.574°N, 110.507°W
Last updated
2026-07-28
Current fill
19.3%vs 7 days ago
+0.2%gaining
vs 1 year ago
-34.8%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. 40.574, -110.507 · Open in Google Maps
About Moon Lake Reservoir and Dam
As of July 28, 2026, Moon Lake Reservoir and Dam is filled to 19.3% of its total capacity, holding roughly 12 hm³ of water out of a maximum 61 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 34.8 points below its level on the same date a year earlier.
Across the readings we hold for Moon Lake Reservoir and Dam — 1824 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 10.8% (September 15, 2025) to a high of 77.8% (June 19, 2023). 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 Utah basin at 40.574°N, 110.507°W.
Key facts
- Current fill level
- 19.3%
- Water stored
- 12 hm³
- Total capacity
- 61 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▼ 34.8 pts
- Primary use
- Multipurpose
- River basin
- Utah
- Operator
- BOR
- Coordinates
- 40.574°N, 110.507°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 19.3% | 12 |
| 27 Jul 2026 | 19.1% | 12 |
| 26 Jul 2026 | 18.9% | 12 |
| 25 Jul 2026 | 18.7% | 11 |
| 24 Jul 2026 | 18.5% | 11 |
| 23 Jul 2026 | 18.4% | 11 |
| 22 Jul 2026 | 18.3% | 11 |
| 21 Jul 2026 | 18.2% | 11 |
| 20 Jul 2026 | 18.2% | 11 |
| 19 Jul 2026 | 18.1% | 11 |
| 18 Jul 2026 | 18.1% | 11 |
| 17 Jul 2026 | 18.0% | 11 |
Frequently asked questions
What is the current water level of Moon Lake Reservoir and Dam?
As of July 28, 2026, Moon Lake Reservoir and Dam is at 19.3% of its capacity, holding approximately 12 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Moon Lake Reservoir and Dam reservoir full?
No. As of July 28, 2026, Moon Lake Reservoir and Dam is critically low at 19.3% of its capacity, so it is not full.
Is the water level at Moon Lake Reservoir and Dam rising or falling?
The level at Moon Lake Reservoir and Dam has been broadly stable over the latest week on record (+0.2 points).
How much water can Moon Lake Reservoir and Dam hold?
Moon Lake Reservoir and Dam has a total capacity of 61 hm³.
Where is Moon Lake Reservoir and Dam reservoir located?
Moon Lake Reservoir and Dam is located in Utah, United States, within the Utah basin (coordinates 40.574°N, 110.507°W).
What is Moon Lake Reservoir and Dam used for?
Moon Lake Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.