Reservoir · Indiana · United States · USACE CWMS
Monroe Lake
52.2% full
Capacity
439.48 hm³
Volume stored
230 hm³
Coordinates
39.008°N, 86.513°W
Last updated
2026-09-14
Current fill
52.2%vs 7 days ago
-0.3%losing
vs 1 year ago
N/A7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. 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. 39.008, -86.513 · Open in Google Maps
About Monroe Lake
As of September 14, 2026, Monroe Lake is filled to 52.2% of its total capacity, holding roughly 230 hm³ of water out of a maximum 439 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts).
Across the readings we hold for Monroe Lake — 121 data points between May 17, 2026 and September 14, 2026 — the level has ranged from a low of 52.2% (September 14, 2026) to a high of 100.0% (May 30, 2026).
It is operated by USACE primarily for multiple purposes. It lies within the Indiana basin at 39.008°N, 86.513°W.
Key facts
- Current fill level
- 52.2%
- Water stored
- 230 hm³
- Total capacity
- 439 hm³
- 7-day change
- ▼ 0.3 pts
- Primary use
- Multipurpose
- River basin
- Indiana
- Operator
- USACE
- Coordinates
- 39.008°N, 86.513°W
- Last updated
- September 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Sep 2026 | 52.2% | 230 |
| 13 Sep 2026 | 52.3% | 230 |
| 12 Sep 2026 | 52.3% | 230 |
| 11 Sep 2026 | 52.3% | 230 |
| 10 Sep 2026 | 52.3% | 230 |
| 9 Sep 2026 | 52.3% | 230 |
| 8 Sep 2026 | 52.4% | 230 |
| 7 Sep 2026 | 52.5% | 231 |
| 6 Sep 2026 | 52.6% | 231 |
| 5 Sep 2026 | 52.6% | 231 |
| 4 Sep 2026 | 52.7% | 232 |
| 3 Sep 2026 | 52.7% | 232 |