Reservoir · South Dakota · United States · BOR RISE
Shadehill Reservoir
Shadehill Reservoir and Dam
65.7% full
Capacity
172.29 hm³
Volume stored
113 hm³
Coordinates
45.753°N, 102.203°W
Last updated
2026-09-12
Current fill
65.7%vs 7 days ago
-0.8%losing
vs 1 year ago
-6.9%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-09-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 45.753, -102.203 · Open in Google Maps
About Shadehill Reservoir
As of September 12, 2026, Shadehill Reservoir is filled to 65.7% of its total capacity, holding roughly 113 hm³ of water out of a maximum 172 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 (-0.8 pts), and it is 6.9 points below its level on the same date a year earlier.
Across the readings we hold for Shadehill Reservoir — 1950 data points between September 15, 2021 and September 12, 2026 — the level has ranged from a low of 51.0% (February 21, 2022) to a high of 85.6% (July 26, 2023). On average the reservoir is fullest around July and at its lowest around March.
It is operated by BOR primarily for multiple purposes. It lies within the South Dakota basin at 45.753°N, 102.203°W.
Key facts
- Current fill level
- 65.7%
- Water stored
- 113 hm³
- Total capacity
- 172 hm³
- 7-day change
- ▼ 0.8 pts
- Year-on-year
- ▼ 6.9 pts
- Primary use
- Multipurpose
- River basin
- South Dakota
- Operator
- BOR
- Coordinates
- 45.753°N, 102.203°W
- Last updated
- September 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Sep 2026 | 65.7% | 113 |
| 11 Sep 2026 | 65.9% | 114 |
| 10 Sep 2026 | 66.0% | 114 |
| 9 Sep 2026 | 66.1% | 114 |
| 8 Sep 2026 | 66.2% | 114 |
| 7 Sep 2026 | 66.4% | 114 |
| 6 Sep 2026 | 66.5% | 114 |
| 5 Sep 2026 | 66.5% | 115 |
| 4 Sep 2026 | 66.6% | 115 |
| 3 Sep 2026 | 66.7% | 115 |
| 2 Sep 2026 | 66.7% | 115 |
| 1 Sep 2026 | 66.8% | 115 |