Reservoir · Kansas · United States · USACE CWMS
Marion Lake
95.1% full
Capacity
99.52 hm³
Volume stored
95 hm³
Vs month average
99% of normal
Coordinates
38.372°N, 97.082°W
Last updated
2026-10-28
Current fill
95.1%vs 7 days ago
-0.6 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
99%of normal
95.1% full on 2026-10-28, against an average of 95.9% for October across 2 years of readings (-0.8 points).
Drought Monitor at this site · 20 October 2026
Nonenot in a drought category
Marion Lake'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. Kansas drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.372°N, 97.082°W · Open in Google Maps
About Marion Lake
As of October 28, 2026, Marion Lake is filled to 95.1% of its total capacity, holding 94.62 hm³ of water out of a maximum 99.52 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.6 pp).
Across the readings we hold for Marion Lake — 327 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 85.0% (April 29, 2022) to a high of 103.2% (October 5, 2026). On average the reservoir is fullest around June and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It is at 38.372°N, 97.082°W.
Key facts
- Current fill level
- 95.1% of total capacity
- Water stored
- 94.62 hm³
- Total capacity
- 99.52 hm³
- 7-day change
- ▼ 0.6 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 38.372°N, 97.082°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 95.1% | 94.62 |
| 27 Oct 2026 | 95.2% | 94.78 |
| 26 Oct 2026 | 95.2% | 94.78 |
| 25 Oct 2026 | 95.4% | 94.94 |
| 24 Oct 2026 | 95.4% | 94.94 |
| 23 Oct 2026 | 95.4% | 94.94 |
| 22 Oct 2026 | 95.6% | 95.18 |
| 21 Oct 2026 | 95.7% | 95.26 |
| 20 Oct 2026 | 95.8% | 95.34 |
| 19 Oct 2026 | 95.9% | 95.42 |
| 18 Oct 2026 | 96.0% | 95.5 |
| 17 Oct 2026 | 96.3% | 95.82 |