Reservoir · Wyoming · United States · USACE CWMS
Glendo Dam & Reservoir
27.3% full
Capacity
560.42 hm³
Volume stored
153 hm³
Coordinates
42.479°N, 104.951°W
Last updated
2026-09-10
Current fill
27.3%vs 7 days ago
+1.1%gaining
vs 1 year ago
+5.2%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — 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: 2026-09-10.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.479, -104.951 · Open in Google Maps
About Glendo Dam & Reservoir
As of September 10, 2026, Glendo Dam & Reservoir is filled to 27.3% of its total capacity, holding roughly 153 hm³ of water out of a maximum 560 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+1.1 pts), and it is 5.2 points above its level on the same date a year earlier.
Across the readings we hold for Glendo Dam & Reservoir — 1815 data points between September 12, 2021 and September 10, 2026 — the level has ranged from a low of 16.3% (November 25, 2021) to a high of 105.0% (June 12, 2023). On average the reservoir is fullest around June and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Wyoming basin at 42.479°N, 104.951°W.
Key facts
- Current fill level
- 27.3%
- Water stored
- 153 hm³
- Total capacity
- 560 hm³
- 7-day change
- ▲ 1.1 pts
- Year-on-year
- ▲ 5.2 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- USACE
- Coordinates
- 42.479°N, 104.951°W
- Last updated
- September 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Sep 2026 | 27.3% | 153 |
| 9 Sep 2026 | 27.3% | 153 |
| 8 Sep 2026 | 27.0% | 151 |
| 7 Sep 2026 | 26.8% | 150 |
| 6 Sep 2026 | 26.5% | 149 |
| 5 Sep 2026 | 26.4% | 148 |
| 4 Sep 2026 | 22.9% | 129 |
| 3 Sep 2026 | 26.2% | 147 |
| 2 Sep 2026 | 26.0% | 146 |
| 1 Sep 2026 | 25.9% | 145 |
| 31 Aug 2026 | 25.8% | 145 |
| 30 Aug 2026 | 25.7% | 144 |