Reservoir · Wyoming · United States · USACE CWMS
Anchor Reservoir
4.6% full
Capacity
21.41 hm³
Volume stored
1 hm³
Coordinates
43.664°N, 108.824°W
Last updated
2026-08-13
Current fill
4.6%vs 7 days ago
+0.3%gaining
vs 1 year ago
+1.5%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: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.664, -108.824 · Open in Google Maps
About Anchor Reservoir
As of August 13, 2026, Anchor Reservoir is filled to 4.6% of its total capacity, holding roughly 1 hm³ of water out of a maximum 21 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it is 1.5 points above its level on the same date a year earlier.
Across the readings we hold for Anchor Reservoir — 1788 data points between August 15, 2021 and August 13, 2026 — the level has ranged from a low of 2.5% (January 15, 2022) to a high of 76.1% (May 20, 2022). On average the reservoir is fullest around June and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It lies within the Wyoming basin at 43.664°N, 108.824°W.
Key facts
- Current fill level
- 4.6%
- Water stored
- 1 hm³
- Total capacity
- 21 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 1.5 pts
- Primary use
- Multipurpose
- River basin
- Wyoming
- Operator
- USACE
- Coordinates
- 43.664°N, 108.824°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 4.6% | 1 |
| 12 Aug 2026 | 4.5% | 1 |
| 11 Aug 2026 | 4.5% | 1 |
| 10 Aug 2026 | 4.5% | 1 |
| 9 Aug 2026 | 4.4% | 1 |
| 8 Aug 2026 | 4.4% | 1 |
| 7 Aug 2026 | 4.3% | 1 |
| 6 Aug 2026 | 4.3% | 1 |
| 5 Aug 2026 | 4.1% | 1 |
| 4 Aug 2026 | 4.1% | 1 |
| 3 Aug 2026 | 4.3% | 1 |
| 2 Aug 2026 | 4.5% | 1 |
Frequently asked questions
What is the current water level of Anchor Reservoir?
As of August 13, 2026, Anchor Reservoir is at 4.6% of its capacity, holding approximately 1 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Anchor Reservoir reservoir full?
No. As of August 13, 2026, Anchor Reservoir is critically low at 4.6% of its capacity, so it is not full.
Is the water level at Anchor Reservoir rising or falling?
The level at Anchor Reservoir has been broadly stable over the latest week on record (+0.3 points).
How much water can Anchor Reservoir hold?
Anchor Reservoir has a total capacity of 21 hm³.
Where is Anchor Reservoir reservoir located?
Anchor Reservoir is located in Wyoming, United States, within the Wyoming basin (coordinates 43.664°N, 108.824°W).
What is Anchor Reservoir used for?
Anchor Reservoir is used primarily for multiple purposes, and is managed by USACE.