Reservoir · Ohio · United States · USACE CWMS
C. J. Brown Dam and Reservoir
100.4% full
Capacity
45.52 hm³
Volume stored
46 hm³
Coordinates
39.949°N, 83.747°W
Last updated
2026-07-29
Current fill
100.4%vs 7 days ago
-0.1%losing
vs 1 year ago
-2.4%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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 39.949, -83.747 · Open in Google Maps
About C. J. Brown Dam and Reservoir
As of July 29, 2026, C. J. Brown Dam and Reservoir is filled to 100.4% 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 (-0.1 pts), and it is 2.4 points below its level on the same date a year earlier.
Across the readings we hold for C. J. Brown Dam and Reservoir — 327 data points between July 31, 2021 and July 29, 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 June 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
- 100.4%
- Water stored
- 46 hm³
- Total capacity
- 46 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 2.4 pts
- Primary use
- Multipurpose
- River basin
- Ohio
- Operator
- USACE
- Coordinates
- 39.949°N, 83.747°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 100.4% | 46 |
| 28 Jul 2026 | 100.5% | 46 |
| 27 Jul 2026 | 100.5% | 46 |
| 26 Jul 2026 | 100.5% | 46 |
| 25 Jul 2026 | 100.7% | 46 |
| 24 Jul 2026 | 100.8% | 46 |
| 23 Jul 2026 | 100.9% | 46 |
| 22 Jul 2026 | 101.2% | 46 |
| 21 Jul 2026 | 101.0% | 46 |
| 20 Jul 2026 | 100.8% | 46 |
| 19 Jul 2026 | 100.9% | 46 |
| 18 Jul 2026 | 100.7% | 46 |
Frequently asked questions
What is the current water level of C. J. Brown Dam and Reservoir?
As of July 29, 2026, C. J. Brown Dam and Reservoir is at 100.4% of its capacity, holding approximately 46 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is C. J. Brown Dam and Reservoir reservoir full?
C. J. Brown Dam and Reservoir is essentially full, sitting at 100.4% of capacity as of July 29, 2026.
Is the water level at C. J. Brown Dam and Reservoir rising or falling?
The level at C. J. Brown Dam and Reservoir has been broadly stable over the latest week on record (-0.1 points).
How much water can C. J. Brown Dam and Reservoir hold?
C. J. Brown Dam and Reservoir has a total capacity of 46 hm³.
Where is C. J. Brown Dam and Reservoir reservoir located?
C. J. Brown Dam and Reservoir is located in Ohio, United States, within the Ohio basin (coordinates 39.949°N, 83.747°W).
What is C. J. Brown Dam and Reservoir used for?
C. J. Brown Dam and Reservoir is used primarily for multiple purposes, and is managed by USACE.