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Keyapaha River near Keyapaha

Highest listed crest 13.70 ftFlood stage 10.0 ft50 crests since 1952

The Keyapaha River near Keyapaha crested at major flood stage 1 time among the 50 crests the National Weather Service lists from 1952 to 2023. The highest, 13.70 ft on April 1, 1952, was major flooding, 3.70 feet above flood stage. 1 other gauge on the Keyapaha River crested above flood stage within a week of it.

The gauge

Highest listed crest
13.70 ft
April 1, 1952
Flood stage
10.0 ft
Major flooding from 12.0 ft
Crests at major
1
62nd of 155 gauges in South Dakota
Most recent flood crest
March 23, 2019
11.36 ft, moderate flooding
Location
Tripp County
South Dakota

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Keyapaha River near Keyapaha
Action stage8.014Apr 21, 2018The level at which the NWS or its partners begin to take action
Flood stage (minor)10.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage11.02Mar 23, 2019Some inundation of structures and roads near the stream
Major flood stage12.01Apr 1, 1952Extensive inundation of structures and roads

Every listed crest

50 crests from 1952 to 2023. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Keyapaha River near Keyapaha, 1952 to 2023 468101214ft Flood stage 10.0 ftMajor 12.0 ft Apr 1, 1952: 13.70 ft, major floodingFeb 20, 1982: 9.45 ft, action stage; 800 cubic feet per secondMay 3, 1983: 7.95 ft, below flood stage; 820 cubic feet per secondApr 9, 1984: 5.58 ft, below flood stage; 310 cubic feet per secondMar 15, 1985: 5.46 ft, below flood stage; 215 cubic feet per secondMay 10, 1986: 6.89 ft, below flood stage; 575 cubic feet per secondApr 5, 1987: 5.89 ft, below flood stage; 381 cubic feet per secondMar 22, 1988: 7.26 ft, below flood stage; 636 cubic feet per secondJul 14, 1989: 4.16 ft, below flood stage; 127 cubic feet per secondJul 8, 1990: 4.48 ft, below flood stage; 143 cubic feet per secondJun 5, 1991: 8.30 ft, action stage; 644 cubic feet per secondAug 4, 1992: 4.60 ft, below flood stage; 133 cubic feet per secondMar 7, 1993: 8.58 ft, action stage; 500 cubic feet per secondMar 4, 1994: 9.23 ft, action stage; 780 cubic feet per secondMay 29, 1995: 8.79 ft, action stage; 852 cubic feet per secondFeb 10, 1996: 8.57 ft, action stageMay 28, 1996: 7.97 ft, below flood stage; 646 cubic feet per secondFeb 18, 1997: 11.29 ft, moderate floodingJul 31, 1998: 7.49 ft, below flood stage; 580 cubic feet per secondMay 11, 1999: 9.48 ft, action stage; 1,200 cubic feet per secondJul 6, 2000: 7.76 ft, below flood stage; 632 cubic feet per secondApr 26, 2001: 8.16 ft, action stage; 734 cubic feet per secondMar 30, 2002: 7.73 ft, below flood stage; 626 cubic feet per secondFeb 21, 2003: 5.45 ft, below flood stageMay 10, 2003: 5.03 ft, below flood stage; 122 cubic feet per secondJun 10, 2004: 7.92 ft, below flood stage; 671 cubic feet per secondApr 23, 2005: 7.63 ft, below flood stage; 581 cubic feet per secondApr 8, 2006: 5.92 ft, below flood stage; 209 cubic feet per secondMar 9, 2007: 8.39 ft, action stage; 750 cubic feet per secondJun 7, 2008: 7.86 ft, below flood stageFeb 12, 2009: 6.97 ft, below flood stageApr 13, 2009: 6.78 ft, below flood stage; 333 cubic feet per secondMar 10, 2010: 8.16 ft, action stage; 648 cubic feet per secondMar 12, 2011: 9.73 ft, action stageApr 17, 2012: 5.61 ft, below flood stage; 143 cubic feet per secondMay 20, 2013: 7.58 ft, below flood stage; 471 cubic feet per secondJun 5, 2014: 8.29 ft, action stage; 573 cubic feet per secondSep 24, 2015: 7.79 ft, below flood stage; 511 cubic feet per secondMay 2, 2016: 7.27 ft, below flood stage; 346 cubic feet per secondFeb 14, 2017: 7.98 ft, below flood stage; 225 cubic feet per secondMar 4, 2018: 8.65 ft, action stageApr 21, 2018: 8.21 ft, action stage; 396 cubic feet per secondMar 23, 2019: 11.36 ft, moderate flooding; 4,160 cubic feet per secondFeb 4, 2020: 6.91 ft, below flood stageJul 25, 2020: 5.95 ft, below flood stage; 205 cubic feet per secondMar 21, 2021: 5.85 ft, below flood stage; 178 cubic feet per secondFeb 11, 2022: 5.68 ft, below flood stageMay 2, 2022: 5.63 ft, below flood stage; 124 cubic feet per secondJun 10, 2023: 7.97 ft, below flood stage; 556 cubic feet per secondOct 15, 2023: 7.13 ft, below flood stage; 390 cubic feet per second Highest, 13.70 ft, Apr 1, 1952 1960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Keyapaha River near Keyapaha 1950s: 1 1 1960s: 0 1970s: 0 1980s: 0 1990s: 1 2000s: 0 2010s: 1 2020s: 0 1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Keyapaha River near Keyapaha
1Apr 1, 195213.70+3.70Major—
2Mar 23, 201911.36+1.36Moderate4,160
3Feb 18, 199711.29+1.29Moderate—
4Mar 12, 20119.73−0.27Action—
5May 11, 19999.48−0.52Action1,200
6Feb 20, 19829.45−0.55Action800
7Mar 4, 19949.23−0.77Action780
8May 29, 19958.79−1.21Action852
9Mar 4, 20188.65−1.35Action—
10Mar 7, 19938.58−1.42Action500
11Feb 10, 19968.57−1.43Action—
12Mar 9, 20078.39−1.61Action750
13Jun 5, 19918.30−1.70Action644
14Jun 5, 20148.29−1.71Action573
15Apr 21, 20188.21−1.79Action396
16Apr 26, 20018.16−1.84Action734
17Mar 10, 20108.16−1.84Action648
18Feb 14, 20177.98−2.02Below flood stage225
19May 28, 19967.97−2.03Below flood stage646
20Jun 10, 20237.97−2.03Below flood stage556
21May 3, 19837.95−2.05Below flood stage820
22Jun 10, 20047.92−2.08Below flood stage671
23Jun 7, 20087.86−2.14Below flood stage—
24Sep 24, 20157.79−2.21Below flood stage511
25Jul 6, 20007.76−2.24Below flood stage632
26Mar 30, 20027.73−2.27Below flood stage626
27Apr 23, 20057.63−2.37Below flood stage581
28May 20, 20137.58−2.42Below flood stage471
29Jul 31, 19987.49−2.51Below flood stage580
30May 2, 20167.27−2.73Below flood stage346
31Mar 22, 19887.26−2.74Below flood stage636
32Oct 15, 20237.13−2.87Below flood stage390
33Feb 12, 20096.97−3.03Below flood stage—
34Feb 4, 20206.91−3.09Below flood stage—
35May 10, 19866.89−3.11Below flood stage575
36Apr 13, 20096.78−3.22Below flood stage333
37Jul 25, 20205.95−4.05Below flood stage205
38Apr 8, 20065.92−4.08Below flood stage209
39Apr 5, 19875.89−4.11Below flood stage381
40Mar 21, 20215.85−4.15Below flood stage178
41Feb 11, 20225.68−4.32Below flood stage—
42May 2, 20225.63−4.37Below flood stage124
43Apr 17, 20125.61−4.39Below flood stage143
44Apr 9, 19845.58−4.42Below flood stage310
45Mar 15, 19855.46−4.54Below flood stage215
46Feb 21, 20035.45−4.55Below flood stage—
47May 10, 20035.03−4.97Below flood stage122
48Aug 4, 19924.60−5.40Below flood stage133
49Jul 8, 19904.48−5.52Below flood stage143
50Jul 14, 19894.16−5.84Below flood stage127

The worst floods along the Keyapaha River

For this gauge's highest crests, the other gauges on the Keyapaha River that crested above flood stage within a week.

April 1, 1952: 13.70 ft here, major flooding

  • WewalaSD · Mar 31, 1952 · 13.08 ft · Major

Gauges on the Keyapaha River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Keyapaha River
Keyapaha this gaugeSD10.013.70 ft, Apr 1, 19521
WewalaSD10.013.50 ft, Mar 25, 19502

Other gauges in Tripp County

Flood gauges in Tripp County
Wewala10.013.50 ft, Mar 25, 19502

Tripp County: every hazard · River floods across the country · South Dakota

NOAA National Water Prediction Service, gauge PAHS2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.