Reservoir · Ohio · United States · USACE CWMS
Michael J Kirwan Reservoir
91.8% full
Capacity
69.94 hm³
Volume stored
64 hm³
Coordinates
41.156°N, 81.081°W
Last updated
2026-09-14
Current fill
91.8%vs 7 days ago
+0.1%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: 2026-09-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.156, -81.081 · Open in Google Maps
About Michael J Kirwan Reservoir
As of September 14, 2026, Michael J Kirwan Reservoir is filled to 91.8% of its total capacity, holding roughly 64 hm³ of water out of a maximum 70 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 Michael J Kirwan Reservoir — 327 data points between September 15, 2021 and September 14, 2026 — the level has ranged from a low of 79.7% (November 24, 2021) to a high of 105.0% (May 24, 2026). On average the reservoir is fullest around May and at its lowest around November.
It is operated by USACE primarily for multiple purposes. It lies within the Ohio basin at 41.156°N, 81.081°W.
Key facts
- Current fill level
- 91.8%
- Water stored
- 64 hm³
- Total capacity
- 70 hm³
- 7-day change
- ▲ 0.1 pts
- Primary use
- Multipurpose
- River basin
- Ohio
- Operator
- USACE
- Coordinates
- 41.156°N, 81.081°W
- Last updated
- September 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Sep 2026 | 91.8% | 64 |
| 13 Sep 2026 | 91.7% | 64 |
| 12 Sep 2026 | 91.5% | 64 |
| 11 Sep 2026 | 91.6% | 64 |
| 10 Sep 2026 | 91.5% | 64 |
| 9 Sep 2026 | 91.5% | 64 |
| 8 Sep 2026 | 91.7% | 64 |
| 7 Sep 2026 | 91.7% | 64 |
| 6 Sep 2026 | 91.7% | 64 |
| 5 Sep 2026 | 91.7% | 64 |
| 4 Sep 2026 | 91.9% | 64 |
| 3 Sep 2026 | 91.5% | 64 |