Reservoir · Utah · United States · BOR RISE
Moon Lake Reservoir
Moon Lake Reservoir and Dam
48.6% full
Capacity
61.06 hm³
Volume stored
30 hm³
Vs month average
155% of normal
Coordinates
40.574°N, 110.507°W
Last updated
2026-10-26
Current fill
48.6%vs 7 days ago
+8.7 ppgaining
vs 1 year ago
+31.3 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
155%of normal
48.6% full on 2026-10-26, against an average of 31.3% for October across 6 years of readings (+17.3 points).
Drought Monitor at this site · 20 October 2026
D0abnormally dry
The ground at Moon Lake Reservoir's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Utah drought figures →
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: 2026-10-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.574°N, 110.507°W · Open in Google Maps
About Moon Lake Reservoir
As of October 26, 2026, Moon Lake Reservoir is filled to 48.6% of its total capacity, holding 29.7 hm³ of water out of a maximum 61.06 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 8.7 percentage points, and it is 31.3 points above its level on the same date a year earlier.
Across the readings we hold for Moon Lake Reservoir — 1824 data points between October 29, 2021 and October 26, 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 is at 40.574°N, 110.507°W.
Key facts
- Current fill level
- 48.6% of total capacity
- Water stored
- 29.7 hm³
- Total capacity
- 61.06 hm³
- 7-day change
- ▲ 8.7 pp
- Year-on-year
- ▲ 31.3 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 40.574°N, 110.507°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 48.6% | 29.7 |
| 25 Oct 2026 | 47.5% | 29.03 |
| 24 Oct 2026 | 46.2% | 28.24 |
| 23 Oct 2026 | 44.9% | 27.39 |
| 22 Oct 2026 | 42.8% | 26.15 |
| 21 Oct 2026 | 41.7% | 25.44 |
| 20 Oct 2026 | 40.8% | 24.89 |
| 19 Oct 2026 | 39.9% | 24.35 |
| 18 Oct 2026 | 39.0% | 23.8 |
| 17 Oct 2026 | 38.0% | 23.22 |
| 16 Oct 2026 | 37.0% | 22.59 |
| 15 Oct 2026 | 35.9% | 21.92 |