Reservoir · Virginia · United States · USACE CWMS
J.W. Flannagan Reservoir
96.3% full
Capacity
82.77 hm³
Volume stored
80 hm³
Coordinates
37.234°N, 82.349°W
Last updated
2026-09-11
Current fill
96.3%vs 7 days ago
-0.1%losing
vs 1 year ago
N/A7-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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.234, -82.349 · Open in Google Maps
About J.W. Flannagan Reservoir
As of September 11, 2026, J.W. Flannagan Reservoir is filled to 96.3% of its total capacity, holding roughly 80 hm³ of water out of a maximum 83 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts).
Across the readings we hold for J.W. Flannagan Reservoir — 47 data points between July 27, 2026 and September 11, 2026 — the level has ranged from a low of 92.3% (July 27, 2026) to a high of 99.0% (August 14, 2026).
It is operated by USACE primarily for multiple purposes. It lies within the Virginia basin at 37.234°N, 82.349°W.
Key facts
- Current fill level
- 96.3%
- Water stored
- 80 hm³
- Total capacity
- 83 hm³
- 7-day change
- ▼ 0.1 pts
- Primary use
- Multipurpose
- River basin
- Virginia
- Operator
- USACE
- Coordinates
- 37.234°N, 82.349°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 96.3% | 80 |
| 10 Sep 2026 | 96.4% | 80 |
| 9 Sep 2026 | 96.6% | 80 |
| 8 Sep 2026 | 96.6% | 80 |
| 7 Sep 2026 | 96.6% | 80 |
| 6 Sep 2026 | 96.5% | 80 |
| 5 Sep 2026 | 96.5% | 80 |
| 4 Sep 2026 | 96.4% | 80 |
| 3 Sep 2026 | 96.4% | 80 |
| 2 Sep 2026 | 96.5% | 80 |
| 1 Sep 2026 | 96.5% | 80 |
| 31 Aug 2026 | 96.5% | 80 |