Reservoir · Illinois · United States · USACE CWMS
Carlyle Pool
91.2% full
Capacity
345.58 hm³
Volume stored
315 hm³
Coordinates
38.618°N, 89.351°W
Last updated
2026-08-03
Current fill
91.2%vs 7 days ago
-0.4%losing
vs 1 year ago
-12.2%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: 2026-08-03.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.618, -89.351 · Open in Google Maps
About Carlyle Pool
As of August 3, 2026, Carlyle Pool is filled to 91.2% of its total capacity, holding roughly 315 hm³ of water out of a maximum 346 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 12.2 points below its level on the same date a year earlier.
Across the readings we hold for Carlyle Pool — 198 data points between August 4, 2021 and August 3, 2026 — the level has ranged from a low of 81.1% (September 11, 2021) to a high of 105.0% (August 4, 2021). On average the reservoir is fullest around May and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Illinois basin at 38.618°N, 89.351°W.
Key facts
- Current fill level
- 91.2%
- Water stored
- 315 hm³
- Total capacity
- 346 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▼ 12.2 pts
- Primary use
- Multipurpose
- River basin
- Illinois
- Operator
- USACE
- Coordinates
- 38.618°N, 89.351°W
- Last updated
- August 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Aug 2026 | 91.2% | 315 |
| 2 Aug 2026 | 91.6% | 317 |
| 1 Aug 2026 | 91.3% | 316 |
| 31 Jul 2026 | 91.0% | 315 |
| 30 Jul 2026 | 91.8% | 317 |
| 29 Jul 2026 | 91.9% | 318 |
| 28 Jul 2026 | 92.5% | 320 |
| 27 Jul 2026 | 92.4% | 319 |
| 26 Jul 2026 | 92.6% | 320 |
| 25 Jul 2026 | 92.5% | 320 |
| 24 Jul 2026 | 91.9% | 318 |
| 23 Jul 2026 | 92.7% | 320 |
Frequently asked questions
What is the current water level of Carlyle Pool?
As of August 3, 2026, Carlyle Pool is at 91.2% of its capacity, holding approximately 315 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Carlyle Pool reservoir full?
No. As of August 3, 2026, Carlyle Pool is high at 91.2% of its capacity, so it is not full.
Is the water level at Carlyle Pool rising or falling?
The level at Carlyle Pool has been broadly stable over the latest week on record (-0.4 points).
How much water can Carlyle Pool hold?
Carlyle Pool has a total capacity of 346 hm³.
Where is Carlyle Pool reservoir located?
Carlyle Pool is located in Illinois, United States, within the Illinois basin (coordinates 38.618°N, 89.351°W).
What is Carlyle Pool used for?
Carlyle Pool is used primarily for multiple purposes, and is managed by USACE.