Reservoir · South Dakota · United States · USACE CWMS
Fort Randall Dam & Reservoir
64.4% full
Capacity
4,687.23 hm³
Volume stored
3020 hm³
Vs month average
84% of normal
Coordinates
43.067°N, 98.553°W
Last updated
2026-10-27
Current fill
64.4%vs 7 days ago
-5.6 pplosing
vs 1 year ago
-6.5 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
84%of normal
64.4% full on 2026-10-27, against an average of 77.1% for October across 6 years of readings (-12.7 points).
Drought Monitor at this site · 20 October 2026
D0abnormally dry
The ground at Fort Randall Dam & Reservoir's coordinates falls inside the D0 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. South Dakota 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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.067°N, 98.553°W · Open in Google Maps
About Fort Randall Dam & Reservoir
As of October 27, 2026, Fort Randall Dam & Reservoir is filled to 64.4% of its total capacity, holding 3,020 hm³ of water out of a maximum 4,687 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 5.6 percentage points, and it is 6.5 points below its level on the same date a year earlier.
Across the readings we hold for Fort Randall Dam & Reservoir — 1821 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 55.6% (November 22, 2022) to a high of 104.1% (July 6, 2024). On average the reservoir is fullest around July and at its lowest around December.
It is operated by USACE primarily for multiple purposes. It is at 43.067°N, 98.553°W.
Key facts
- Current fill level
- 64.4% of total capacity
- Water stored
- 3,020 hm³
- Total capacity
- 4,687 hm³
- 7-day change
- ▼ 5.6 pp
- Year-on-year
- ▼ 6.5 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 43.067°N, 98.553°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 64.4% | 3,020 |
| 26 Oct 2026 | 65.5% | 3,071 |
| 25 Oct 2026 | 66.7% | 3,124 |
| 24 Oct 2026 | 67.4% | 3,161 |
| 23 Oct 2026 | 67.9% | 3,181 |
| 22 Oct 2026 | 68.9% | 3,228 |
| 21 Oct 2026 | 69.4% | 3,255 |
| 20 Oct 2026 | 70.0% | 3,282 |
| 19 Oct 2026 | 71.2% | 3,339 |
| 18 Oct 2026 | 72.3% | 3,390 |
| 17 Oct 2026 | 73.3% | 3,438 |
| 16 Oct 2026 | 74.0% | 3,469 |