RIVER GAUGE
Pactola Reservoir
Pennington County, South Dakota
Water level4558.03 ft
Flow—
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action4580.2 ft55,972 cfs
The past week
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What floods at each level
- 4655 ft
Dam Crest Elevation
- 4651.7 ft
Elevation that would produce max discharge through the spillway, 245K cfs.
- 4621.5 ft
Reservoir capacity 99K acre ft. Top of flood control zone or when uncontrolled flow over spillway begins.
- 4590 ft
This would be a record high pool elevation
- 4585 ft
Flooding of timber stands adjacent to the reservoir and the marina and other developed recreation facilities on the reservoir.
- 4580.2 ft
Normal Pool Elevation - Top of Active Conservation
- 4456.1 ft
Top of Inactive Conservation
- 4440 ft
Top of Dead Pool
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 28, 2015 | 4589.46 ft | -9,999 cfs |
| Jun 4, 2019 | 4588.63 ft | — |
| May 18, 1965 | 4585.87 ft | -9,999 cfs |
UpstreamRapid Creek at Silver City
DownstreamRapid Creek below Pactola Dam
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