Reservoir · Iowa · United States · USACE CWMS
Coralville Lake Reservoir MET Station
70.6% full
Capacity
51.89 hm³
Volume stored
37 hm³
Coordinates
41.725°N, 91.528°W
Last updated
2026-09-11
Current fill
70.6%vs 7 days ago
+7.3%gaining
vs 1 year ago
N/A7-day trend
↑rising
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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.725, -91.528 · Open in Google Maps
About Coralville Lake Reservoir MET Station
As of September 11, 2026, Coralville Lake Reservoir MET Station is filled to 70.6% of its total capacity, holding roughly 37 hm³ of water out of a maximum 52 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 7.3 percentage points.
Across the readings we hold for Coralville Lake Reservoir MET Station — 197 data points between September 12, 2021 and September 11, 2026 — the level has ranged from a low of 59.4% (August 14, 2026) to a high of 100.0% (November 21, 2021). On average the reservoir is fullest around November and at its lowest around August.
It is operated by USACE primarily for multiple purposes. It lies within the Iowa basin at 41.725°N, 91.528°W.
Key facts
- Current fill level
- 70.6%
- Water stored
- 37 hm³
- Total capacity
- 52 hm³
- 7-day change
- ▲ 7.3 pts
- Primary use
- Multipurpose
- River basin
- Iowa
- Operator
- USACE
- Coordinates
- 41.725°N, 91.528°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 70.6% | 37 |
| 10 Sep 2026 | 71.2% | 37 |
| 9 Sep 2026 | 70.4% | 37 |
| 8 Sep 2026 | 66.3% | 34 |
| 7 Sep 2026 | 65.0% | 34 |
| 6 Sep 2026 | 64.1% | 33 |
| 5 Sep 2026 | 63.7% | 33 |
| 4 Sep 2026 | 63.3% | 33 |
| 3 Sep 2026 | 62.4% | 32 |
| 2 Sep 2026 | 62.2% | 32 |
| 1 Sep 2026 | 62.4% | 32 |
| 31 Aug 2026 | 62.5% | 32 |