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Boyer River at Logan

Highest listed crest 25.33 ftFlood stage 21.0 ft99 crests since 1918

The Boyer River at Logan crested at major flood stage 2 times among the 99 crests the National Weather Service lists from 1918 to 2025. The highest, 25.33 ft on March 13, 2019, was major flooding, 4.33 feet above flood stage.

The gauge

Highest listed crest
25.33 ft
March 13, 2019; 35,400 cubic feet per second
Flood stage
21.0 ft
Major flooding from 25.0 ft
Crests at major
2
70th of 203 gauges in Iowa
Most recent flood crest
March 13, 2019
25.33 ft, major flooding
Location
Harrison County
Iowa

Flood stages

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

Flood categories, Boyer River at Logan
Action stage19.016Dec 14, 2015The level at which the NWS or its partners begin to take action
Flood stage (minor)21.05Sep 1, 2014Minimal or no property damage, but possibly some public threat
Moderate flood stage22.08Jun 8, 2008Some inundation of structures and roads near the stream
Major flood stage25.02Mar 13, 2019Extensive inundation of structures and roads

Every listed crest

99 crests from 1918 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Boyer River at Logan, 1918 to 2025 51015202530ft Flood stage 21.0 ftMajor 25.0 ft Jun 5, 1918: 17.90 ft, below flood stage; 8,710 cubic feet per secondApr 23, 1919: 17.80 ft, below flood stage; 8,620 cubic feet per secondAug 20, 1920: 10.70 ft, below flood stage; 3,210 cubic feet per secondSep 10, 1921: 13.50 ft, below flood stage; 6,890 cubic feet per secondAug 21, 1922: 14.00 ft, below flood stage; 7,470 cubic feet per secondJun 18, 1923: 15.60 ft, below flood stage; 9,200 cubic feet per secondJun 24, 1924: 19.00 ft, action stage; 13,200 cubic feet per secondJun 3, 1925: 18.70 ft, below flood stage; 12,800 cubic feet per secondSep 6, 1938: 19.10 ft, action stage; 13,500 cubic feet per secondJul 3, 1939: 15.00 ft, below flood stage; 9,000 cubic feet per secondJul 9, 1940: 19.20 ft, action stage; 13,600 cubic feet per secondJun 11, 1941: 10.40 ft, below flood stage; 4,400 cubic feet per secondJun 28, 1942: 19.00 ft, action stage; 13,400 cubic feet per secondMay 15, 1943: 19.03 ft, action stage; 13,400 cubic feet per secondJun 12, 1944: 18.18 ft, below flood stage; 12,300 cubic feet per secondApr 23, 1945: 19.10 ft, action stage; 13,000 cubic feet per secondSep 4, 1946: 17.20 ft, below flood stage; 11,000 cubic feet per secondJun 22, 1947: 18.24 ft, below flood stage; 12,600 cubic feet per secondFeb 27, 1948: 15.19 ft, below flood stage; 9,630 cubic feet per secondMar 4, 1949: 19.18 ft, action stage; 17,400 cubic feet per secondJun 18, 1950: 20.01 ft, action stage; 18,800 cubic feet per secondMar 28, 1951: 20.00 ft, action stage; 23,000 cubic feet per secondJun 21, 1952: 19.50 ft, action stage; 19,000 cubic feet per secondJun 10, 1953: 15.30 ft, below flood stage; 11,300 cubic feet per secondJun 21, 1954: 18.80 ft, below flood stage; 17,700 cubic feet per secondJul 10, 1955: 12.52 ft, below flood stage; 8,450 cubic feet per secondMay 13, 1956: 11.70 ft, below flood stage; 7,440 cubic feet per secondJun 16, 1957: 22.67 ft, moderate flooding; 23,600 cubic feet per secondJul 2, 1958: 18.70 ft, below flood stage; 17,400 cubic feet per secondMay 31, 1959: 15.00 ft, below flood stage; 13,100 cubic feet per secondMar 29, 1960: 14.62 ft, below flood stage; 10,200 cubic feet per secondJun 27, 1961: 15.40 ft, below flood stage; 14,800 cubic feet per secondMar 28, 1962: 13.70 ft, below flood stage; 12,400 cubic feet per secondJun 8, 1963: 11.66 ft, below flood stage; 7,800 cubic feet per secondMay 24, 1964: 19.52 ft, action stage; 19,600 cubic feet per secondMar 1, 1965: 25.22 ft, major floodingMay 26, 1965: 19.33 ft, action stage; 19,400 cubic feet per secondJun 28, 1966: 9.10 ft, below flood stage; 3,450 cubic feet per secondJun 9, 1967: 16.89 ft, below flood stage; 15,200 cubic feet per secondJun 25, 1968: 17.50 ft, below flood stage; 16,000 cubic feet per secondMar 18, 1969: 13.75 ft, below flood stage; 9,900 cubic feet per secondMar 3, 1970: 7.28 ft, below flood stage; 1,840 cubic feet per secondFeb 19, 1971: 22.65 ft, moderate flooding; 25,000 cubic feet per secondSep 11, 1972: 21.76 ft, minor flooding; 23,500 cubic feet per secondSep 26, 1973: 20.32 ft, action stage; 21,000 cubic feet per secondMay 19, 1974: 20.21 ft, action stage; 20,900 cubic feet per secondApr 28, 1975: 13.84 ft, below flood stage; 10,200 cubic feet per secondMay 23, 1976: 7.25 ft, below flood stage; 2,260 cubic feet per secondAug 31, 1977: 11.38 ft, below flood stage; 3,860 cubic feet per secondSep 13, 1978: 21.73 ft, minor flooding; 21,900 cubic feet per secondMar 18, 1979: 22.47 ft, moderate flooding; 23,400 cubic feet per secondJun 15, 1980: 14.84 ft, below flood stage; 9,870 cubic feet per secondJun 29, 1981: 12.96 ft, below flood stage; 7,350 cubic feet per secondMay 29, 1982: 18.93 ft, below flood stage; 16,400 cubic feet per secondJun 28, 1983: 12.43 ft, below flood stage; 6,290 cubic feet per secondJun 15, 1984: 14.63 ft, below flood stage; 8,700 cubic feet per secondFeb 21, 1985: 15.54 ft, below flood stage; 8,600 cubic feet per secondMar 18, 1986: 16.37 ft, below flood stage; 11,900 cubic feet per secondJul 12, 1987: 15.10 ft, below flood stage; 10,000 cubic feet per secondJun 8, 1988: 16.01 ft, below flood stage; 13,200 cubic feet per secondSep 8, 1989: 15.75 ft, below flood stage; 11,000 cubic feet per secondJun 17, 1990: 22.54 ft, moderate flooding; 30,800 cubic feet per secondJun 15, 1991: 20.76 ft, action stage; 23,700 cubic feet per secondDec 13, 1991: 8.57 ft, below flood stage; 2,860 cubic feet per secondJul 9, 1993: 22.19 ft, moderate flooding; 26,200 cubic feet per secondFeb 18, 1994: 15.07 ft, below flood stage; 10,500 cubic feet per secondMar 11, 1995: 11.97 ft, below flood stage; 6,150 cubic feet per secondJun 21, 1996: 23.02 ft, moderate flooding; 27,600 cubic feet per secondJul 17, 1996: 23.87 ft, moderate flooding; 28,700 cubic feet per secondFeb 18, 1997: 21.07 ft, minor floodingJun 21, 1997: 14.37 ft, below flood stage; 10,100 cubic feet per secondJun 11, 1998: 14.45 ft, below flood stage; 9,690 cubic feet per secondJul 2, 1999: 15.72 ft, below flood stage; 11,800 cubic feet per secondJun 26, 2000: 5.58 ft, below flood stage; 908 cubic feet per secondMay 2, 2001: 16.26 ft, below flood stage; 13,100 cubic feet per secondJun 12, 2002: 9.81 ft, below flood stage; 3,900 cubic feet per secondJul 9, 2003: 11.12 ft, below flood stage; 5,330 cubic feet per secondJun 17, 2004: 10.67 ft, below flood stage; 4,820 cubic feet per secondFeb 13, 2005: 10.23 ft, below flood stage; 4,520 cubic feet per secondSep 17, 2006: 6.34 ft, below flood stage; 1,230 cubic feet per secondMay 6, 2007: 21.53 ft, minor flooding; 24,700 cubic feet per secondJun 8, 2008: 24.75 ft, moderate flooding; 33,600 cubic feet per secondFeb 10, 2009: 9.97 ft, below flood stageJun 27, 2010: 15.18 ft, below flood stage; 11,200 cubic feet per secondFeb 17, 2011: 13.20 ft, below flood stage; 8,170 cubic feet per secondFeb 29, 2012: 6.39 ft, below flood stage; 1,150 cubic feet per secondMay 27, 2013: 11.28 ft, below flood stage; 5,330 cubic feet per secondSep 1, 2014: 21.94 ft, minor flooding; 25,800 cubic feet per secondDec 14, 2015: 20.15 ft, action stageSep 19, 2016: 13.43 ft, below flood stage; 8,430 cubic feet per secondJan 19, 2017: 14.72 ft, below flood stageAug 20, 2018: 14.70 ft, below flood stage; 10,400 cubic feet per secondMar 13, 2019: 25.33 ft, major flooding; 35,400 cubic feet per secondJun 10, 2020: 11.11 ft, below flood stage; 5,560 cubic feet per secondJul 11, 2021: 6.45 ft, below flood stage; 1,220 cubic feet per secondJul 8, 2022: 6.12 ft, below flood stage; 1,080 cubic feet per secondFeb 15, 2023: 16.50 ft, below flood stageMay 21, 2024: 12.66 ft, below flood stage; 7,560 cubic feet per secondAug 9, 2025: 12.20 ft, below flood stage; 6,690 cubic feet per second Highest, 25.33 ft, Mar 13, 2019 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Boyer River at Logan 1910s: 0 1920s: 0 1930s: 0 1940s: 0 1950s: 1 1960s: 1 1970s: 4 1980s: 0 1990s: 5 5 2000s: 2 2010s: 2 2020s: 0 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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

The 50 highest of 99 listed crests.

Highest listed crests, Boyer River at Logan
1Mar 13, 201925.33+4.33Major35,400
2Mar 1, 196525.22+4.22Major—
3Jun 8, 200824.75+3.75Moderate33,600
4Jul 17, 199623.87+2.87Moderate28,700
5Jun 21, 199623.02+2.02Moderate27,600
6Jun 16, 195722.67+1.67Moderate23,600
7Feb 19, 197122.65+1.65Moderate25,000
8Jun 17, 199022.54+1.54Moderate30,800
9Mar 18, 197922.47+1.47Moderate23,400
10Jul 9, 199322.19+1.19Moderate26,200
11Sep 1, 201421.94+0.94Minor25,800
12Sep 11, 197221.76+0.76Minor23,500
13Sep 13, 197821.73+0.73Minor21,900
14May 6, 200721.53+0.53Minor24,700
15Feb 18, 199721.07+0.07Minor—
16Jun 15, 199120.76−0.24Action23,700
17Sep 26, 197320.32−0.68Action21,000
18May 19, 197420.21−0.79Action20,900
19Dec 14, 201520.15−0.85Action—
20Jun 18, 195020.01−0.99Action18,800
21Mar 28, 195120.00−1.00Action23,000
22May 24, 196419.52−1.48Action19,600
23Jun 21, 195219.50−1.50Action19,000
24May 26, 196519.33−1.67Action19,400
25Jul 9, 194019.20−1.80Action13,600
26Mar 4, 194919.18−1.82Action17,400
27Sep 6, 193819.10−1.90Action13,500
28Apr 23, 194519.10−1.90Action13,000
29May 15, 194319.03−1.97Action13,400
30Jun 24, 192419.00−2.00Action13,200
31Jun 28, 194219.00−2.00Action13,400
32May 29, 198218.93−2.07Below flood stage16,400
33Jun 21, 195418.80−2.20Below flood stage17,700
34Jun 3, 192518.70−2.30Below flood stage12,800
35Jul 2, 195818.70−2.30Below flood stage17,400
36Jun 22, 194718.24−2.76Below flood stage12,600
37Jun 12, 194418.18−2.82Below flood stage12,300
38Jun 5, 191817.90−3.10Below flood stage8,710
39Apr 23, 191917.80−3.20Below flood stage8,620
40Jun 25, 196817.50−3.50Below flood stage16,000
41Sep 4, 194617.20−3.80Below flood stage11,000
42Jun 9, 196716.89−4.11Below flood stage15,200
43Feb 15, 202316.50−4.50Below flood stage—
44Mar 18, 198616.37−4.63Below flood stage11,900
45May 2, 200116.26−4.74Below flood stage13,100
46Jun 8, 198816.01−4.99Below flood stage13,200
47Sep 8, 198915.75−5.25Below flood stage11,000
48Jul 2, 199915.72−5.28Below flood stage11,800
49Jun 18, 192315.60−5.40Below flood stage9,200
50Feb 21, 198515.54−5.46Below flood stage8,600

Other gauges in Harrison County

Flood gauges in Harrison County
Pisgah28.028.87 ft, Jul 17, 19960

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

NOAA National Water Prediction Service, gauge LGNI4, 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.