Reservoir · Kansas · United States · USACE CWMS
Marion Lake
96.6% full
Capacity
99.52 hm³
Volume stored
96 hm³
Coordinates
38.372°N, 97.082°W
Last updated
2026-06-11
Current fill
96.6%vs 7 days ago
+0.3%gaining
vs 1 year ago
+5.3%year-over-year
7-day trend
→stable
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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.372, -97.082 · Open in Google Maps
About Marion Lake
As of June 11, 2026, Marion Lake is filled to 96.6% of its total capacity, holding roughly 96 hm³ of water out of a maximum 100 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it is 5.3 points above its level on the same date a year earlier.
Across the readings we hold for Marion Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 86.9% (January 6, 2022) to a high of 103.3% (June 13, 2021). On average the reservoir is fullest around July and at its lowest around January.
It is operated by USACE primarily for multiple purposes. It lies within the Kansas basin at 38.372°N, 97.082°W.
Key facts
- Current fill level
- 96.6%
- Water stored
- 96 hm³
- Total capacity
- 100 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 5.3 pts
- Primary use
- Multipurpose
- River basin
- Kansas
- Operator
- USACE
- Coordinates
- 38.372°N, 97.082°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 96.6% | 96 |
| 10 Jun 2026 | 96.3% | 96 |
| 9 Jun 2026 | 95.9% | 95 |
| 8 Jun 2026 | 92.2% | 92 |
| 7 Jun 2026 | 92.3% | 92 |
| 6 Jun 2026 | 92.2% | 92 |
| 5 Jun 2026 | 92.3% | 92 |
| 4 Jun 2026 | 92.3% | 92 |
| 3 Jun 2026 | 92.0% | 92 |
| 2 Jun 2026 | 92.4% | 92 |
| 1 Jun 2026 | 92.4% | 92 |
| 31 May 2026 | 92.6% | 92 |
Frequently asked questions
What is the current water level of Marion Lake?
As of June 11, 2026, Marion Lake is at 96.6% of its capacity, holding approximately 96 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Marion Lake reservoir full?
Marion Lake is essentially full, sitting at 96.6% of capacity as of June 11, 2026.
Is the water level at Marion Lake rising or falling?
The level at Marion Lake has been broadly stable over the latest week on record (+0.3 points).
How much water can Marion Lake hold?
Marion Lake has a total capacity of 100 hm³.
Where is Marion Lake reservoir located?
Marion Lake is located in Kansas, United States, within the Kansas basin (coordinates 38.372°N, 97.082°W).
What is Marion Lake used for?
Marion Lake is used primarily for multiple purposes, and is managed by USACE.