Reservoir · Iowa · United States · USACE CWMS
Lake Red Rock Pool
65.8% full
Capacity
344.39 hm³
Volume stored
227 hm³
Coordinates
41.369°N, 92.981°W
Last updated
2026-09-14
Current fill
65.8%vs 7 days ago
+2.0%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: 2026-09-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.369, -92.981 · Open in Google Maps
About Lake Red Rock Pool
As of September 14, 2026, Lake Red Rock Pool is filled to 65.8% of its total capacity, holding roughly 227 hm³ of water out of a maximum 344 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 2.0 percentage points.
Across the readings we hold for Lake Red Rock Pool — 199 data points between September 15, 2021 and September 14, 2026 — the level has ranged from a low of 63.7% (September 6, 2026) to a high of 100.0% (December 18, 2021). On average the reservoir is fullest around December and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Iowa basin at 41.369°N, 92.981°W.
Key facts
- Current fill level
- 65.8%
- Water stored
- 227 hm³
- Total capacity
- 344 hm³
- 7-day change
- ▲ 2.0 pts
- Primary use
- Multipurpose
- River basin
- Iowa
- Operator
- USACE
- Coordinates
- 41.369°N, 92.981°W
- Last updated
- September 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Sep 2026 | 65.8% | 227 |
| 13 Sep 2026 | 67.3% | 232 |
| 12 Sep 2026 | 71.2% | 245 |
| 11 Sep 2026 | 76.5% | 264 |
| 10 Sep 2026 | 80.0% | 275 |
| 9 Sep 2026 | 74.6% | 257 |
| 8 Sep 2026 | 64.9% | 223 |
| 7 Sep 2026 | 63.8% | 220 |
| 6 Sep 2026 | 63.7% | 219 |
| 5 Sep 2026 | 63.9% | 220 |
| 4 Sep 2026 | 64.0% | 221 |
| 3 Sep 2026 | 64.0% | 221 |