Reservoir · South Dakota · United States · USACE CWMS
Fort Randall Dam & Reservoir
89.3% full
Capacity
4,687.23 hm³
Volume stored
4184 hm³
Coordinates
43.067°N, 98.553°W
Last updated
2026-07-29
Current fill
89.3%vs 7 days ago
0.0%stable
vs 1 year ago
-0.6%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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.067, -98.553 · Open in Google Maps
About Fort Randall Dam & Reservoir
As of July 29, 2026, Fort Randall Dam & Reservoir is filled to 89.3% of its total capacity, holding roughly 4,184 hm³ of water out of a maximum 4,687 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Fort Randall Dam & Reservoir — 1821 data points between July 31, 2021 and July 29, 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 lies within the South Dakota basin at 43.067°N, 98.553°W.
Key facts
- Current fill level
- 89.3%
- Water stored
- 4,184 hm³
- Total capacity
- 4,687 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 0.6 pts
- Primary use
- Multipurpose
- River basin
- South Dakota
- Operator
- USACE
- Coordinates
- 43.067°N, 98.553°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 89.3% | 4,184 |
| 28 Jul 2026 | 89.3% | 4,184 |
| 27 Jul 2026 | 89.3% | 4,185 |
| 26 Jul 2026 | 89.5% | 4,194 |
| 25 Jul 2026 | 89.8% | 4,209 |
| 24 Jul 2026 | 89.9% | 4,214 |
| 23 Jul 2026 | 89.8% | 4,210 |
| 22 Jul 2026 | 89.9% | 4,216 |
| 21 Jul 2026 | 90.1% | 4,223 |
| 20 Jul 2026 | 90.3% | 4,233 |
| 19 Jul 2026 | 91.3% | 4,278 |
| 18 Jul 2026 | 91.6% | 4,295 |
Frequently asked questions
What is the current water level of Fort Randall Dam & Reservoir?
As of July 29, 2026, Fort Randall Dam & Reservoir is at 89.3% of its capacity, holding approximately 4,184 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Fort Randall Dam & Reservoir reservoir full?
No. As of July 29, 2026, Fort Randall Dam & Reservoir is high at 89.3% of its capacity, so it is not full.
Is the water level at Fort Randall Dam & Reservoir rising or falling?
The level at Fort Randall Dam & Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Fort Randall Dam & Reservoir hold?
Fort Randall Dam & Reservoir has a total capacity of 4,687 hm³.
Where is Fort Randall Dam & Reservoir reservoir located?
Fort Randall Dam & Reservoir is located in South Dakota, United States, within the South Dakota basin (coordinates 43.067°N, 98.553°W).
What is Fort Randall Dam & Reservoir used for?
Fort Randall Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.