Reservoir · South Dakota · United States · USACE CWMS
Shadehill Dam & Reservoir
63.2% full
Capacity
172.29 hm³
Volume stored
109 hm³
Vs month average
93% of normal
Coordinates
45.753°N, 102.203°W
Last updated
2026-10-29
Current fill
63.2%vs 7 days ago
-0.5 pplosing
vs 1 year ago
-9.3 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
93%of normal
63.2% full on 2026-10-29, against an average of 68.1% for October across 6 years of readings (-4.9 points).
Drought Monitor at this site · 27 October 2026
D1moderate drought
The ground at Shadehill Dam & Reservoir's coordinates falls inside the D1 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: 2026-10-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 45.753°N, 102.203°W · Open in Google Maps
About Shadehill Dam & Reservoir
As of October 29, 2026, Shadehill Dam & Reservoir is filled to 63.2% of its total capacity, holding 108.96 hm³ of water out of a maximum 172.29 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 (-0.5 pp), and it is 9.3 points below its level on the same date a year earlier.
Across the readings we hold for Shadehill Dam & Reservoir — 1820 data points between October 30, 2021 and October 29, 2026 — the level has ranged from a low of 51.0% (February 22, 2022) to a high of 85.6% (July 27, 2023). On average the reservoir is fullest around June and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It is at 45.753°N, 102.203°W.
Key facts
- Current fill level
- 63.2% of total capacity
- Water stored
- 108.96 hm³
- Total capacity
- 172.29 hm³
- 7-day change
- ▼ 0.5 pp
- Year-on-year
- ▼ 9.3 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 45.753°N, 102.203°W
- Last updated
- October 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Oct 2026 | 63.2% | 108.96 |
| 28 Oct 2026 | 63.3% | 109.06 |
| 27 Oct 2026 | 63.3% | 109.11 |
| 26 Oct 2026 | 63.4% | 109.21 |
| 25 Oct 2026 | 63.4% | 109.31 |
| 24 Oct 2026 | 63.7% | 109.72 |
| 23 Oct 2026 | 63.6% | 109.57 |
| 22 Oct 2026 | 63.7% | 109.67 |
| 21 Oct 2026 | 63.7% | 109.82 |
| 20 Oct 2026 | 63.7% | 109.82 |
| 19 Oct 2026 | 63.8% | 109.97 |
| 18 Oct 2026 | 63.9% | 110.12 |