RIVER GAUGE
Deerfield Reservoir
Pennington County, South Dakota
Water level5904.12 ft
Flow—
Last readingSep 16, 2026, 5:00 PM UTC (last recorded)
Action5908 ft15,655 cfs
The past week
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What floods at each level
- 5958 ft
Dam crest elevation.
- 5953 ft
Maximum water surface elevation or the top of the surcharge capacity.
- 5912 ft
Spillway releases over an uncontrolled crest and open cut channel in the right abutment begin.
- 5908 ft
Top of active conservation pool.
- 5839 ft
Top of dead pool elevation.
- 5808 ft
Streambed elevation.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Feb 24, 1985 | 5909.05 ft | -9,999 cfs |
| Jun 1, 2011 | 5908.73 ft | — |
| Jun 20, 1998 | 5908.65 ft | — |
UpstreamCastle Creek above Deerfield
DownstreamCastle Creek below Deerfield Reservoir
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