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Monona-Harrison Ditch near Turin

Highest listed crest 26.12 ftFlood stage 23.0 ft50 crests since 1976

The Monona-Harrison Ditch near Turin crested above flood stage 2 times among the 50 crests the National Weather Service lists from 1976 to 2025. The highest, 26.12 ft on March 15, 2019, was moderate flooding, 3.12 feet above flood stage.

The gauge

Highest listed crest
26.12 ft
March 15, 2019; 14,500 cubic feet per second
Flood stage
23.0 ft
Major flooding from 28.0 ft
Crests at major
0
2 above flood stage
Most recent flood crest
March 15, 2019
26.12 ft, moderate flooding
Location
Monona County
Iowa

Flood stages

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

Flood categories, Monona-Harrison Ditch near Turin
Action stage21.05Jun 23, 2014The level at which the NWS or its partners begin to take action
Flood stage (minor)23.01Jun 18, 1984Minimal or no property damage, but possibly some public threat
Moderate flood stage25.01Mar 15, 2019Some inundation of structures and roads near the stream
Major flood stage28.00—Extensive inundation of structures and roads

Every listed crest

50 crests from 1976 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Monona-Harrison Ditch near Turin, 1976 to 2025 51015202530ft Flood stage 23.0 ftMajor 28.0 ft May 23, 1976: 5.85 ft, below flood stage; 1,280 cubic feet per secondAug 9, 1977: 18.37 ft, below flood stage; 5,510 cubic feet per secondMar 19, 1978: 21.90 ft, action stage; 9,570 cubic feet per secondMar 20, 1979: 20.95 ft, below flood stage; 7,440 cubic feet per secondMay 31, 1980: 13.00 ft, below flood stage; 2,200 cubic feet per secondJun 15, 1981: 11.91 ft, below flood stage; 1,910 cubic feet per secondFeb 22, 1982: 18.96 ft, below flood stage; 5,510 cubic feet per secondJun 21, 1983: 18.47 ft, below flood stage; 5,120 cubic feet per secondJun 18, 1984: 24.80 ft, minor flooding; 13,300 cubic feet per secondApr 22, 1985: 21.30 ft, action stage; 9,860 cubic feet per secondMar 18, 1986: 22.94 ft, action stage; 12,000 cubic feet per secondMar 24, 1987: 16.30 ft, below flood stage; 4,740 cubic feet per secondAug 23, 1988: 8.21 ft, below flood stage; 901 cubic feet per secondMar 10, 1989: 17.81 ft, below flood stage; 5,280 cubic feet per secondMay 19, 1990: 20.28 ft, below flood stage; 8,600 cubic feet per secondJun 5, 1991: 15.96 ft, below flood stage; 4,090 cubic feet per secondMay 17, 1992: 13.29 ft, below flood stage; 2,790 cubic feet per secondMar 27, 1993: 20.48 ft, below flood stage; 6,980 cubic feet per secondFeb 19, 1994: 20.80 ft, below flood stage; 7,370 cubic feet per secondMay 28, 1995: 16.63 ft, below flood stage; 4,440 cubic feet per secondJun 22, 1996: 22.61 ft, action stage; 8,490 cubic feet per secondFeb 19, 1997: 16.70 ft, below flood stage; 4,650 cubic feet per secondJun 24, 1998: 17.89 ft, below flood stage; 5,340 cubic feet per secondApr 22, 1999: 15.11 ft, below flood stage; 4,280 cubic feet per secondJun 26, 2000: 11.06 ft, below flood stage; 1,930 cubic feet per secondMar 21, 2001: 16.39 ft, below flood stage; 5,070 cubic feet per secondJun 12, 2002: 14.19 ft, below flood stage; 3,540 cubic feet per secondJun 25, 2003: 13.57 ft, below flood stage; 3,190 cubic feet per secondMay 24, 2004: 17.77 ft, below flood stage; 5,070 cubic feet per secondMay 12, 2005: 14.61 ft, below flood stage; 3,790 cubic feet per secondMay 1, 2006: 7.72 ft, below flood stage; 942 cubic feet per secondMar 13, 2007: 17.97 ft, below flood stage; 6,750 cubic feet per secondMay 30, 2008: 15.70 ft, below flood stage; 4,470 cubic feet per secondFeb 10, 2009: 16.31 ft, below flood stage; 4,880 cubic feet per secondMar 15, 2010: 17.33 ft, below flood stage; 5,740 cubic feet per secondMay 26, 2011: 14.97 ft, below flood stage; 3,600 cubic feet per secondMay 26, 2012: 11.85 ft, below flood stage; 2,310 cubic feet per secondMay 28, 2013: 17.87 ft, below flood stage; 5,990 cubic feet per secondJun 23, 2014: 21.49 ft, action stage; 9,030 cubic feet per secondAug 19, 2015: 18.41 ft, below flood stage; 6,410 cubic feet per secondJun 18, 2016: 17.68 ft, below flood stageMay 20, 2017: 13.22 ft, below flood stage; 3,000 cubic feet per secondJun 26, 2018: 13.11 ft, below flood stage; 2,800 cubic feet per secondMar 15, 2019: 26.12 ft, moderate flooding; 14,500 cubic feet per secondMar 20, 2020: 11.34 ft, below flood stage; 2,530 cubic feet per secondMar 24, 2021: 8.42 ft, below flood stage; 984 cubic feet per secondDec 16, 2022: 5.77 ft, below flood stage; 65 cubic feet per secondFeb 28, 2023: 15.02 ft, below flood stage; 4,000 cubic feet per secondJun 27, 2024: 20.26 ft, below flood stage; 7,930 cubic feet per secondAug 6, 2025: 7.99 ft, below flood stage; 1,070 cubic feet per second Highest, 26.12 ft, Mar 15, 2019 19801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Monona-Harrison Ditch near Turin 1970s: 0 1980s: 1 1 1990s: 0 2000s: 0 2010s: 1 2020s: 0 1970s1980s1990s2000s2010s2020s
  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.
  3. 18 crests measured on an earlier gauge datum are left out: 11.01 ft on Jul 2, 1958; 18.73 ft on May 31, 1959; 21.32 ft on Mar 30, 1960; 13.13 ft on Mar 15, 1961; 21.09 ft on Mar 28, 1962; 21.87 ft on Jun 2, 1963; and more.

Highest crests

Highest listed crests, Monona-Harrison Ditch near Turin
1Mar 15, 201926.12+3.12Moderate14,500
2Jun 18, 198424.80+1.80Minor13,300
3Mar 18, 198622.94−0.06Action12,000
4Jun 22, 199622.61−0.39Action8,490
5Mar 19, 197821.90−1.10Action9,570
6Jun 23, 201421.49−1.51Action9,030
7Apr 22, 198521.30−1.70Action9,860
8Mar 20, 197920.95−2.05Below flood stage7,440
9Feb 19, 199420.80−2.20Below flood stage7,370
10Mar 27, 199320.48−2.52Below flood stage6,980
11May 19, 199020.28−2.72Below flood stage8,600
12Jun 27, 202420.26−2.74Below flood stage7,930
13Feb 22, 198218.96−4.04Below flood stage5,510
14Jun 21, 198318.47−4.53Below flood stage5,120
15Aug 19, 201518.41−4.59Below flood stage6,410
16Aug 9, 197718.37−4.63Below flood stage5,510
17Mar 13, 200717.97−5.03Below flood stage6,750
18Jun 24, 199817.89−5.11Below flood stage5,340
19May 28, 201317.87−5.13Below flood stage5,990
20Mar 10, 198917.81−5.19Below flood stage5,280
21May 24, 200417.77−5.23Below flood stage5,070
22Jun 18, 201617.68−5.32Below flood stage—
23Mar 15, 201017.33−5.67Below flood stage5,740
24Feb 19, 199716.70−6.30Below flood stage4,650
25May 28, 199516.63−6.37Below flood stage4,440
26Mar 21, 200116.39−6.61Below flood stage5,070
27Feb 10, 200916.31−6.69Below flood stage4,880
28Mar 24, 198716.30−6.70Below flood stage4,740
29Jun 5, 199115.96−7.04Below flood stage4,090
30May 30, 200815.70−7.30Below flood stage4,470
31Apr 22, 199915.11−7.89Below flood stage4,280
32Feb 28, 202315.02−7.98Below flood stage4,000
33May 26, 201114.97−8.03Below flood stage3,600
34May 12, 200514.61−8.39Below flood stage3,790
35Jun 12, 200214.19−8.81Below flood stage3,540
36Jun 25, 200313.57−9.43Below flood stage3,190
37May 17, 199213.29−9.71Below flood stage2,790
38May 20, 201713.22−9.78Below flood stage3,000
39Jun 26, 201813.11−9.89Below flood stage2,800
40May 31, 198013.00−10.00Below flood stage2,200
41Jun 15, 198111.91−11.09Below flood stage1,910
42May 26, 201211.85−11.15Below flood stage2,310
43Mar 20, 202011.34−11.66Below flood stage2,530
44Jun 26, 200011.06−11.94Below flood stage1,930
45Mar 24, 20218.42−14.58Below flood stage984
46Aug 23, 19888.21−14.79Below flood stage901
47Aug 6, 20257.99−15.01Below flood stage1,070
48May 1, 20067.72−15.28Below flood stage942
49May 23, 19765.85−17.15Below flood stage1,280
50Dec 16, 20225.77−17.23Below flood stage65

Other gauges in Monona County

Flood gauges in Monona County
Turin25.029.57 ft, Mar 15, 20190
Mapleton21.024.70 ft, May 31, 19592

Monona County: every hazard · River floods across the country · Iowa

NOAA National Water Prediction Service, gauge TRNI4, 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.