Reservoir · Iowa · United States · USACE CWMS
Coralville Lake Reservoir MET Station
85.0% full
Capacity
59.85 hm³
Volume stored
51 hm³
Vs month average
104% of normal
Coordinates
41.725°N, 91.528°W
Last updated
2026-10-28
Current fill
85.0%vs 7 days ago
0.0 ppstable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
104%of normal
85.0% full on 2026-10-28, against an average of 81.6% for October across 2 years of readings (+3.4 points).
Drought Monitor at this site · 20 October 2026
Nonenot in a drought category
Coralville Lake Reservoir MET Station's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Iowa drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.725°N, 91.528°W · Open in Google Maps
About Coralville Lake Reservoir MET Station
As of October 28, 2026, Coralville Lake Reservoir MET Station is filled to 85.0% of its total capacity, holding 50.85 hm³ of water out of a maximum 59.85 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pp).
Across the readings we hold for Coralville Lake Reservoir MET Station — 199 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 51.3% (February 3, 2022) to a high of 100.0% (September 21, 2026). On average the reservoir is fullest around November and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It is at 41.725°N, 91.528°W.
Key facts
- Current fill level
- 85.0% of total capacity
- Water stored
- 50.85 hm³
- Total capacity
- 59.85 hm³
- 7-day change
- No change
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 41.725°N, 91.528°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 85.0% | 50.85 |
| 27 Oct 2026 | 84.3% | 50.47 |
| 26 Oct 2026 | 84.7% | 50.7 |
| 25 Oct 2026 | 86.0% | 51.45 |
| 24 Oct 2026 | 86.0% | 51.45 |
| 23 Oct 2026 | 85.1% | 50.92 |
| 22 Oct 2026 | 84.5% | 50.55 |
| 21 Oct 2026 | 85.0% | 50.85 |
| 20 Oct 2026 | 84.5% | 50.55 |
| 19 Oct 2026 | 84.1% | 50.33 |
| 18 Oct 2026 | 83.2% | 49.81 |
| 17 Oct 2026 | 82.5% | 49.37 |