Reservoir · Ohio · United States · USACE CWMS
C. J. Brown Dam and Reservoir
91.0% full
Capacity
45.52 hm³
Volume stored
41 hm³
Vs month average
97% of normal
Coordinates
39.949°N, 83.747°W
Last updated
2026-10-29
Current fill
91.0%vs 7 days ago
-1.7 pplosing
vs 1 year ago
N/A7-day trend
↓falling
Drought context
Storage vs October average
97%of normal
91.0% full on 2026-10-29, against an average of 93.8% for October across 2 years of readings (-2.8 points).
Drought Monitor at this site · 27 October 2026
Nonenot in a drought category
C. J. Brown Dam and Reservoir's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Ohio 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: 2026-10-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.949°N, 83.747°W · Open in Google Maps
About C. J. Brown Dam and Reservoir
As of October 29, 2026, C. J. Brown Dam and Reservoir is filled to 91.0% of its total capacity, holding 41.43 hm³ of water out of a maximum 45.52 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 1.7 percentage points.
Across the readings we hold for C. J. Brown Dam and Reservoir — 330 data points between October 30, 2021 and October 29, 2026 — the level has ranged from a low of 83.7% (December 21, 2021) to a high of 104.5% (May 8, 2022). On average the reservoir is fullest around May and at its lowest around December.
It is operated by USACE primarily for multiple purposes. It is at 39.949°N, 83.747°W.
Key facts
- Current fill level
- 91.0% of total capacity
- Water stored
- 41.43 hm³
- Total capacity
- 45.52 hm³
- 7-day change
- ▼ 1.7 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 39.949°N, 83.747°W
- Last updated
- October 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Oct 2026 | 91.0% | 41.43 |
| 28 Oct 2026 | 91.0% | 41.41 |
| 27 Oct 2026 | 91.0% | 41.43 |
| 26 Oct 2026 | 91.1% | 41.48 |
| 25 Oct 2026 | 91.5% | 41.64 |
| 24 Oct 2026 | 91.9% | 41.84 |
| 23 Oct 2026 | 92.4% | 42.07 |
| 22 Oct 2026 | 92.7% | 42.2 |
| 21 Oct 2026 | 93.0% | 42.32 |
| 20 Oct 2026 | 93.2% | 42.41 |
| 19 Oct 2026 | 93.4% | 42.51 |
| 18 Oct 2026 | 93.6% | 42.62 |