Reservoir · Wyoming · United States · USACE CWMS
Kortes Dam & Reservoir
99.5% full
Capacity
5.85 hm³
Volume stored
6 hm³
Vs month average
100% of normal
Coordinates
42.174°N, 106.881°W
Last updated
2026-10-27
Current fill
99.5%vs 7 days ago
+0.2 ppgaining
vs 1 year ago
+0.2 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
100%of normal
99.5% full on 2026-10-27, against an average of 99.5% for October across 6 years of readings (0.0 points).
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at Kortes Dam & Reservoir's coordinates falls inside the D2 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Wyoming drought figures →
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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.174°N, 106.881°W · Open in Google Maps
About Kortes Dam & Reservoir
As of October 27, 2026, Kortes Dam & Reservoir is filled to 99.5% of its total capacity, holding 5.82 hm³ of water out of a maximum 5.85 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.2 pp), and it sits close to where it was a year earlier.
Across the readings we hold for Kortes Dam & Reservoir — 1815 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 89.6% (September 9, 2025) to a high of 103.6% (June 25, 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 is at 42.174°N, 106.881°W.
Key facts
- Current fill level
- 99.5% of total capacity
- Water stored
- 5.82 hm³
- Total capacity
- 5.85 hm³
- 7-day change
- ▲ 0.2 pp
- Year-on-year
- ▲ 0.2 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 42.174°N, 106.881°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 99.5% | 5.82 |
| 26 Oct 2026 | 99.7% | 5.83 |
| 25 Oct 2026 | 99.7% | 5.83 |
| 24 Oct 2026 | 99.7% | 5.83 |
| 23 Oct 2026 | 99.5% | 5.82 |
| 22 Oct 2026 | 99.5% | 5.82 |
| 21 Oct 2026 | 99.3% | 5.81 |
| 20 Oct 2026 | 99.3% | 5.81 |
| 19 Oct 2026 | 99.5% | 5.82 |
| 18 Oct 2026 | 99.5% | 5.82 |
| 17 Oct 2026 | 99.7% | 5.83 |
| 16 Oct 2026 | 99.5% | 5.82 |