Reservoir · Virginia · United States · USACE CWMS
J.W. Flannagan Reservoir
92.4% full
Capacity
82.77 hm³
Volume stored
77 hm³
Coordinates
37.234°N, 82.349°W
Last updated
2026-07-30
Current fill
92.4%vs 7 days ago
0.0%stable
vs 1 year ago
-4.1%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: 2026-07-30.
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 July 30, 2026, J.W. Flannagan Reservoir is filled to 92.4% of its total capacity, holding roughly 77 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 (+0.0 pts), and it is 4.1 points below its level on the same date a year earlier.
Across the readings we hold for J.W. Flannagan Reservoir — 100 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 89.8% (June 17, 2026) to a high of 101.3% (August 18, 2021).
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
- 92.4%
- Water stored
- 77 hm³
- Total capacity
- 83 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 4.1 pts
- Primary use
- Multipurpose
- River basin
- Virginia
- Operator
- USACE
- Coordinates
- 37.234°N, 82.349°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 92.4% | 77 |
| 29 Jul 2026 | 92.4% | 76 |
| 28 Jul 2026 | 92.3% | 76 |
| 27 Jul 2026 | 92.3% | 76 |
| 26 Jul 2026 | 92.3% | 76 |
| 25 Jul 2026 | 92.3% | 76 |
| 24 Jul 2026 | 92.3% | 76 |
| 23 Jul 2026 | 92.3% | 76 |
| 22 Jul 2026 | 92.3% | 76 |
| 21 Jul 2026 | 92.1% | 76 |
| 20 Jul 2026 | 92.1% | 76 |
| 19 Jul 2026 | 92.1% | 76 |
Frequently asked questions
What is the current water level of J.W. Flannagan Reservoir?
As of July 30, 2026, J.W. Flannagan Reservoir is at 92.4% of its capacity, holding approximately 77 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is J.W. Flannagan Reservoir reservoir full?
No. As of July 30, 2026, J.W. Flannagan Reservoir is high at 92.4% of its capacity, so it is not full.
Is the water level at J.W. Flannagan Reservoir rising or falling?
The level at J.W. Flannagan Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can J.W. Flannagan Reservoir hold?
J.W. Flannagan Reservoir has a total capacity of 83 hm³.
Where is J.W. Flannagan Reservoir reservoir located?
J.W. Flannagan Reservoir is located in Virginia, United States, within the Virginia basin (coordinates 37.234°N, 82.349°W).
What is J.W. Flannagan Reservoir used for?
J.W. Flannagan Reservoir is used primarily for multiple purposes, and is managed by USACE.