Reservoir · Minnesota · United States · USACE CWMS
Big Sandy Lake Dam
53.4% full
Capacity
136.28 hm³
Volume stored
73 hm³
Vs month average
99% of normal
Coordinates
46.788°N, 93.328°W
Last updated
2026-10-28
Current fill
53.4%vs 7 days ago
+0.2 ppgaining
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
99%of normal
53.4% full on 2026-10-28, against an average of 53.9% for October across 5 years of readings (-0.5 points).
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at Big Sandy Lake Dam's coordinates falls inside the D2 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Minnesota drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 46.788°N, 93.328°W · Open in Google Maps
About Big Sandy Lake Dam
As of October 28, 2026, Big Sandy Lake Dam is filled to 53.4% of its total capacity, holding 72.82 hm³ of water out of a maximum 136.28 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 (+0.2 pp).
Across the readings we hold for Big Sandy Lake Dam — 1371 data points between October 29, 2021 and October 28, 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 February.
It is operated by USACE primarily for multiple purposes. It is at 46.788°N, 93.328°W.
Key facts
- Current fill level
- 53.4% of total capacity
- Water stored
- 72.82 hm³
- Total capacity
- 136.28 hm³
- 7-day change
- ▲ 0.2 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 46.788°N, 93.328°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 53.4% | 72.82 |
| 27 Oct 2026 | 53.4% | 72.84 |
| 26 Oct 2026 | 53.2% | 72.46 |
| 25 Oct 2026 | 53.2% | 72.57 |
| 24 Oct 2026 | 53.2% | 72.5 |
| 23 Oct 2026 | 53.4% | 72.74 |
| 22 Oct 2026 | 53.2% | 72.5 |
| 21 Oct 2026 | 53.2% | 72.5 |
| 20 Oct 2026 | 53.4% | 72.71 |
| 19 Oct 2026 | 53.3% | 72.63 |
| 18 Oct 2026 | 53.4% | 72.73 |
| 17 Oct 2026 | 53.6% | 73.09 |