Reservoir · Iowa · United States · USACE CWMS
Saylorville Lake Reservoir
96.5% full
Capacity
91.28 hm³
Volume stored
88 hm³
Coordinates
41.704°N, 93.689°W
Last updated
2026-09-11
Current fill
96.5%vs 7 days ago
+6.9%gaining
vs 1 year ago
N/A7-day trend
↑rising
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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.704, -93.689 · Open in Google Maps
About Saylorville Lake Reservoir
As of September 11, 2026, Saylorville Lake Reservoir is filled to 96.5% of its total capacity, holding roughly 88 hm³ of water out of a maximum 91 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has risen by 6.9 percentage points.
Across the readings we hold for Saylorville Lake Reservoir — 92 data points between June 10, 2026 and September 11, 2026 — the level has ranged from a low of 86.8% (June 14, 2026) to a high of 105.0% (July 5, 2026).
It is operated by USACE primarily for multiple purposes. It lies within the Iowa basin at 41.704°N, 93.689°W.
Key facts
- Current fill level
- 96.5%
- Water stored
- 88 hm³
- Total capacity
- 91 hm³
- 7-day change
- ▲ 6.9 pts
- Primary use
- Multipurpose
- River basin
- Iowa
- Operator
- USACE
- Coordinates
- 41.704°N, 93.689°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 96.5% | 88 |
| 10 Sep 2026 | 96.8% | 88 |
| 9 Sep 2026 | 96.8% | 88 |
| 8 Sep 2026 | 94.1% | 86 |
| 7 Sep 2026 | 91.6% | 84 |
| 6 Sep 2026 | 91.4% | 83 |
| 5 Sep 2026 | 90.0% | 82 |
| 4 Sep 2026 | 89.6% | 82 |
| 3 Sep 2026 | 89.1% | 81 |
| 2 Sep 2026 | 89.0% | 81 |
| 1 Sep 2026 | 88.8% | 81 |
| 31 Aug 2026 | 88.6% | 81 |