Reservoir · Ohio · United States · USACE CWMS
C. J. Brown Dam and Reservoir
100.6% full
Capacity
45.52 hm³
Volume stored
46 hm³
Coordinates
39.949°N, 83.747°W
Last updated
2026-09-10
Current fill
100.6%vs 7 days ago
+0.4%gaining
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: 2026-09-10.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.949, -83.747 · Open in Google Maps
About C. J. Brown Dam and Reservoir
As of September 10, 2026, C. J. Brown Dam and Reservoir is filled to 100.6% of its total capacity, holding roughly 46 hm³ of water out of a maximum 46 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.4 pts).
Across the readings we hold for C. J. Brown Dam and Reservoir — 329 data points between September 12, 2021 and September 10, 2026 — the level has ranged from a low of 83.7% (December 21, 2021) to a high of 105.0% (May 23, 2026). On average the reservoir is fullest around May and at its lowest around December.
It is operated by USACE primarily for multiple purposes. It lies within the Ohio basin at 39.949°N, 83.747°W.
Key facts
- Current fill level
- 100.6%
- Water stored
- 46 hm³
- Total capacity
- 46 hm³
- 7-day change
- ▲ 0.4 pts
- Primary use
- Multipurpose
- River basin
- Ohio
- Operator
- USACE
- Coordinates
- 39.949°N, 83.747°W
- Last updated
- September 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Sep 2026 | 100.6% | 46 |
| 9 Sep 2026 | 100.6% | 46 |
| 8 Sep 2026 | 100.7% | 46 |
| 7 Sep 2026 | 100.8% | 46 |
| 6 Sep 2026 | 100.9% | 46 |
| 5 Sep 2026 | 100.7% | 46 |
| 4 Sep 2026 | 100.4% | 46 |
| 3 Sep 2026 | 100.2% | 46 |
| 2 Sep 2026 | 100.2% | 46 |
| 1 Sep 2026 | 100.2% | 46 |
| 31 Aug 2026 | 100.2% | 46 |
| 30 Aug 2026 | 100.1% | 46 |