Reservoir · Minnesota · United States · USACE CWMS
Big Sandy Lake Dam
53.7% full
Capacity
136.28 hm³
Volume stored
73 hm³
Coordinates
46.788°N, 93.328°W
Last updated
2026-09-11
Current fill
53.7%vs 7 days ago
+0.3%gaining
vs 1 year ago
N/A7-day trend
→stable
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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.788, -93.328 · Open in Google Maps
About Big Sandy Lake Dam
As of September 11, 2026, Big Sandy Lake Dam is filled to 53.7% of its total capacity, holding roughly 73 hm³ of water out of a maximum 136 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts).
Across the readings we hold for Big Sandy Lake Dam — 1369 data points between September 15, 2021 and September 11, 2026 — the level has ranged from a low of 38.8% (April 8, 2023) to a high of 100.0% (April 28, 2023). On average the reservoir is fullest around May and at its lowest around March.
It is operated by USACE primarily for multiple purposes. It lies within the Minnesota basin at 46.788°N, 93.328°W.
Key facts
- Current fill level
- 53.7%
- Water stored
- 73 hm³
- Total capacity
- 136 hm³
- 7-day change
- ▲ 0.3 pts
- Primary use
- Multipurpose
- River basin
- Minnesota
- Operator
- USACE
- Coordinates
- 46.788°N, 93.328°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 53.7% | 73 |
| 10 Sep 2026 | 53.7% | 73 |
| 9 Sep 2026 | 53.7% | 73 |
| 8 Sep 2026 | 53.9% | 73 |
| 7 Sep 2026 | 53.4% | 73 |
| 6 Sep 2026 | 53.3% | 73 |
| 5 Sep 2026 | 53.3% | 73 |
| 4 Sep 2026 | 53.4% | 73 |
| 3 Sep 2026 | 53.2% | 73 |
| 2 Sep 2026 | 53.3% | 73 |
| 1 Sep 2026 | 53.3% | 73 |
| 31 Aug 2026 | 53.4% | 73 |