Reservoir · Utah · United States · BOR RISE
Lost Creek Reservoir
Lost Creek Reservoir and Dam
28.7% full
Capacity
27.77 hm³
Volume stored
8 hm³
Coordinates
41.189°N, 111.396°W
Last updated
2026-09-09
Current fill
28.7%vs 7 days ago
-1.4%losing
vs 1 year ago
-31.1%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: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.189, -111.396 · Open in Google Maps
About Lost Creek Reservoir
As of September 9, 2026, Lost Creek Reservoir is filled to 28.7% of its total capacity, holding roughly 8 hm³ of water out of a maximum 28 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-1.4 pts), and it is 31.1 points below its level on the same date a year earlier.
Across the readings we hold for Lost Creek Reservoir — 1824 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 28.7% (September 9, 2026) to a high of 102.7% (May 22, 2024). On average the reservoir is fullest around June and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Utah basin at 41.189°N, 111.396°W.
Key facts
- Current fill level
- 28.7%
- Water stored
- 8 hm³
- Total capacity
- 28 hm³
- 7-day change
- ▼ 1.4 pts
- Year-on-year
- ▼ 31.1 pts
- Primary use
- Multipurpose
- River basin
- Utah
- Operator
- BOR
- Coordinates
- 41.189°N, 111.396°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 28.7% | 8 |
| 8 Sep 2026 | 29.0% | 8 |
| 7 Sep 2026 | 29.2% | 8 |
| 6 Sep 2026 | 29.4% | 8 |
| 5 Sep 2026 | 29.6% | 8 |
| 4 Sep 2026 | 29.8% | 8 |
| 3 Sep 2026 | 30.0% | 8 |
| 2 Sep 2026 | 30.1% | 8 |
| 1 Sep 2026 | 30.4% | 8 |
| 31 Aug 2026 | 30.7% | 9 |
| 30 Aug 2026 | 30.9% | 9 |
| 29 Aug 2026 | 31.2% | 9 |