Reservoir · Indiana · United States · USACE CWMS
Monroe Lake
67.0% full
Capacity
439.48 hm³
Volume stored
295 hm³
Coordinates
39.008°N, 86.513°W
Last updated
2026-07-30
Current fill
67.0%vs 7 days ago
-0.6%losing
vs 1 year ago
-28.5%year-over-year
7-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: 2026-07-30.
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 July 30, 2026, Monroe Lake is filled to 67.0% of its total capacity, holding roughly 295 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 (-0.6 pts), and it is 28.5 points below its level on the same date a year earlier.
Across the readings we hold for Monroe Lake — 327 data points between August 1, 2021 and July 30, 2026 — the level has ranged from a low of 51.0% (September 18, 2021) to a high of 100.0% (May 30, 2026). On average the reservoir is fullest around June and at its lowest around October.
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
- 67.0%
- Water stored
- 295 hm³
- Total capacity
- 439 hm³
- 7-day change
- ▼ 0.6 pts
- Year-on-year
- ▼ 28.5 pts
- Primary use
- Multipurpose
- River basin
- Indiana
- Operator
- USACE
- Coordinates
- 39.008°N, 86.513°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 67.0% | 295 |
| 29 Jul 2026 | 67.6% | 297 |
| 28 Jul 2026 | 68.8% | 302 |
| 27 Jul 2026 | 69.9% | 307 |
| 26 Jul 2026 | 71.1% | 312 |
| 25 Jul 2026 | 72.3% | 318 |
| 24 Jul 2026 | 73.5% | 323 |
| 23 Jul 2026 | 74.8% | 329 |
| 22 Jul 2026 | 76.0% | 334 |
| 21 Jul 2026 | 77.2% | 339 |
| 20 Jul 2026 | 78.3% | 344 |
| 19 Jul 2026 | 79.6% | 350 |
Frequently asked questions
What is the current water level of Monroe Lake?
As of July 30, 2026, Monroe Lake is at 67.0% of its capacity, holding approximately 295 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Monroe Lake reservoir full?
No. As of July 30, 2026, Monroe Lake is within its normal operating range at 67.0% of its capacity, so it is not full.
Is the water level at Monroe Lake rising or falling?
The level at Monroe Lake has been broadly stable over the latest week on record (-0.6 points).
How much water can Monroe Lake hold?
Monroe Lake has a total capacity of 439 hm³.
Where is Monroe Lake reservoir located?
Monroe Lake is located in Indiana, United States, within the Indiana basin (coordinates 39.008°N, 86.513°W).
What is Monroe Lake used for?
Monroe Lake is used primarily for multiple purposes, and is managed by USACE.