Reservoir · South Dakota · United States · USACE CWMS
Pactola Dam & Reservoir
71.3% full
Capacity
69.03 hm³
Volume stored
49 hm³
Vs month average
82% of normal
Coordinates
44.075°N, 103.489°W
Last updated
2026-10-27
Current fill
71.3%vs 7 days ago
+0.4 ppgaining
vs 1 year ago
-14.0 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
82%of normal
71.3% full on 2026-10-27, against an average of 86.7% for October across 6 years of readings (-15.4 points).
Drought Monitor at this site · 20 October 2026
D1moderate drought
The ground at Pactola 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: 2026-10-27.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 44.075°N, 103.489°W · Open in Google Maps
About Pactola Dam & Reservoir
As of October 27, 2026, Pactola Dam & Reservoir is filled to 71.3% of its total capacity, holding 49.23 hm³ of water out of a maximum 69.03 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 (+0.4 pp), and it is 14.0 points below its level on the same date a year earlier.
Across the readings we hold for Pactola Dam & Reservoir — 1821 data points between October 29, 2021 and October 27, 2026 — the level has ranged from a low of 70.0% (September 17, 2026) to a high of 100.3% (July 4, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It is at 44.075°N, 103.489°W.
Key facts
- Current fill level
- 71.3% of total capacity
- Water stored
- 49.23 hm³
- Total capacity
- 69.03 hm³
- 7-day change
- ▲ 0.4 pp
- Year-on-year
- ▼ 14.0 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 44.075°N, 103.489°W
- Last updated
- October 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Oct 2026 | 71.3% | 49.23 |
| 26 Oct 2026 | 71.3% | 49.2 |
| 25 Oct 2026 | 71.2% | 49.16 |
| 24 Oct 2026 | 71.2% | 49.12 |
| 23 Oct 2026 | 71.1% | 49.08 |
| 22 Oct 2026 | 71.1% | 49.05 |
| 21 Oct 2026 | 71.0% | 49.01 |
| 20 Oct 2026 | 70.9% | 48.96 |
| 19 Oct 2026 | 70.9% | 48.92 |
| 18 Oct 2026 | 70.8% | 48.88 |
| 17 Oct 2026 | 70.8% | 48.85 |
| 16 Oct 2026 | 70.7% | 48.8 |