Reservoir · South Dakota · United States · USACE CWMS
Gavins Point Dam & Reservoir
91.2% full
Capacity
462.56 hm³
Volume stored
422 hm³
Coordinates
42.850°N, 97.483°W
Last updated
2026-07-29
Current fill
91.2%vs 7 days ago
+0.3%gaining
vs 1 year ago
+3.5%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. 42.850, -97.483 · Open in Google Maps
About Gavins Point Dam & Reservoir
As of July 29, 2026, Gavins Point Dam & Reservoir is filled to 91.2% of its total capacity, holding roughly 422 hm³ of water out of a maximum 463 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 3.5 points above its level on the same date a year earlier.
Across the readings we hold for Gavins Point Dam & Reservoir — 1821 data points between July 31, 2021 and July 29, 2026 — the level has ranged from a low of 80.0% (February 26, 2022) to a high of 105.0% (February 9, 2024). On average the reservoir is fullest around December and at its lowest around April.
It is operated by USACE primarily for multiple purposes. It lies within the South Dakota basin at 42.850°N, 97.483°W.
Key facts
- Current fill level
- 91.2%
- Water stored
- 422 hm³
- Total capacity
- 463 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▲ 3.5 pts
- Primary use
- Multipurpose
- River basin
- South Dakota
- Operator
- USACE
- Coordinates
- 42.850°N, 97.483°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 91.2% | 422 |
| 28 Jul 2026 | 90.9% | 421 |
| 27 Jul 2026 | 90.4% | 418 |
| 26 Jul 2026 | 89.9% | 416 |
| 25 Jul 2026 | 88.8% | 411 |
| 24 Jul 2026 | 88.3% | 408 |
| 23 Jul 2026 | 87.5% | 405 |
| 22 Jul 2026 | 87.7% | 406 |
| 21 Jul 2026 | 88.0% | 407 |
| 20 Jul 2026 | 88.3% | 408 |
| 19 Jul 2026 | 88.3% | 408 |
| 18 Jul 2026 | 88.5% | 410 |
Frequently asked questions
What is the current water level of Gavins Point Dam & Reservoir?
As of July 29, 2026, Gavins Point Dam & Reservoir is at 91.2% of its capacity, holding approximately 422 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Gavins Point Dam & Reservoir reservoir full?
No. As of July 29, 2026, Gavins Point Dam & Reservoir is high at 91.2% of its capacity, so it is not full.
Is the water level at Gavins Point Dam & Reservoir rising or falling?
The level at Gavins Point Dam & Reservoir has been broadly stable over the latest week on record (+0.3 points).
How much water can Gavins Point Dam & Reservoir hold?
Gavins Point Dam & Reservoir has a total capacity of 463 hm³.
Where is Gavins Point Dam & Reservoir reservoir located?
Gavins Point Dam & Reservoir is located in South Dakota, United States, within the South Dakota basin (coordinates 42.850°N, 97.483°W).
What is Gavins Point Dam & Reservoir used for?
Gavins Point Dam & Reservoir is used primarily for multiple purposes, and is managed by USACE.