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Platte River (WI) at Rockville

Highest listed crest 17.26 ftFlood stage 9.0 ft57 crests since 1942

The Platte River (WI) at Rockville crested at major flood stage 9 times among the 57 crests the National Weather Service lists from 1942 to 2026. The highest, 17.26 ft on July 16, 1950, was major flooding, 8.26 feet above flood stage.

The gauge

Highest listed crest
17.26 ft
July 16, 1950; 43,500 cubic feet per second
Flood stage
9.0 ft
Major flooding from 13.0 ft
Crests at major
9
4th of 143 gauges in Wisconsin
Most recent flood crest
April 18, 2026
9.53 ft, minor flooding
Location
Grant County
Near Platteville (8.7 mi)

Flood stages

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

Flood categories, Platte River (WI) at Rockville
Action stage7.01Mar 19, 1986The level at which the NWS or its partners begin to take action
Flood stage (minor)9.033Apr 18, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage11.014Sep 13, 2019Some inundation of structures and roads near the stream
Major flood stage13.09Sep 19, 2019Extensive inundation of structures and roads

Every listed crest

57 crests from 1942 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Platte River (WI) at Rockville, 1942 to 2026 81012141618ft Flood stage 9.0 ftMajor 13.0 ft Jun 29, 1942: 9.10 ft, minor flooding; 3,670 cubic feet per secondJun 2, 1943: 12.10 ft, moderate flooding; 10,400 cubic feet per secondMar 14, 1944: 10.44 ft, minor flooding; 6,310 cubic feet per secondJun 28, 1945: 9.10 ft, minor flooding; 3,660 cubic feet per secondJan 5, 1946: 11.40 ft, moderate flooding; 8,700 cubic feet per secondJun 13, 1947: 12.30 ft, moderate flooding; 11,000 cubic feet per secondFeb 28, 1948: 11.10 ft, moderate flooding; 7,980 cubic feet per secondMar 4, 1949: 9.40 ft, minor flooding; 4,150 cubic feet per secondJul 16, 1950: 17.26 ft, major flooding; 43,500 cubic feet per secondAug 6, 1951: 12.81 ft, moderate flooding; 13,900 cubic feet per secondFeb 20, 1953: 10.79 ft, minor flooding; 7,290 cubic feet per secondJun 21, 1954: 13.33 ft, major flooding; 16,400 cubic feet per secondMay 20, 1959: 10.77 ft, minor flooding; 7,220 cubic feet per secondJan 12, 1960: 10.90 ft, minor flooding; 7,550 cubic feet per secondFeb 23, 1961: 9.42 ft, minor flooding; 4,080 cubic feet per secondJul 20, 1962: 10.34 ft, minor flooding; 6,160 cubic feet per secondMar 16, 1963: 10.86 ft, minor flooding; 6,140 cubic feet per secondFeb 28, 1965: 10.86 ft, minor flooding; 3,000 cubic feet per secondAug 21, 1966: 11.13 ft, moderate flooding; 5,940 cubic feet per secondJan 24, 1967: 13.42 ft, major flooding; 8,000 cubic feet per secondJun 29, 1969: 10.70 ft, minor flooding; 4,980 cubic feet per secondJul 14, 1972: 10.97 ft, minor flooding; 5,550 cubic feet per secondDec 30, 1972: 10.83 ft, minor flooding; 5,250 cubic feet per secondJan 27, 1974: 11.29 ft, moderate flooding; 6,370 cubic feet per secondMar 22, 1975: 11.16 ft, moderate flooding; 6,180 cubic feet per secondMar 12, 1976: 9.52 ft, minor flooding; 2,980 cubic feet per secondJul 18, 1977: 11.47 ft, moderate flooding; 5,170 cubic feet per secondJun 17, 1978: 13.16 ft, major flooding; 9,700 cubic feet per secondAug 18, 1979: 10.18 ft, minor flooding; 4,040 cubic feet per secondJan 16, 1980: 9.52 ft, minor flooding; 2,370 cubic feet per secondMar 16, 1980: 9.75 ft, minor flooding; 2,560 cubic feet per secondSep 8, 1980: 9.53 ft, minor flooding; 2,380 cubic feet per secondMar 16, 1982: 10.20 ft, minor flooding; 2,990 cubic feet per secondAug 4, 1982: 9.68 ft, minor flooding; 2,440 cubic feet per secondJun 8, 1984: 9.38 ft, minor flooding; 2,200 cubic feet per secondFeb 21, 1985: 15.54 ft, major floodingMar 19, 1986: 8.64 ft, action stage; 1,780 cubic feet per secondMar 11, 1989: 10.34 ft, minor flooding; 3,210 cubic feet per secondJun 29, 1990: 14.85 ft, major flooding; 19,000 cubic feet per secondJun 15, 1991: 10.47 ft, minor flooding; 3,350 cubic feet per secondJul 9, 1993: 11.17 ft, moderate flooding; 3,980 cubic feet per secondFeb 19, 1994: 10.40 ft, minor flooding; 2,860 cubic feet per secondFeb 18, 1997: 10.79 ft, minor floodingMar 31, 1998: 10.60 ft, minor flooding; 3,220 cubic feet per secondJun 1, 2000: 10.66 ft, minor flooding; 3,290 cubic feet per secondJun 17, 2004: 10.56 ft, minor flooding; 3,000 cubic feet per secondApr 25, 2008: 15.15 ft, major flooding; 20,642 cubic feet per secondJun 8, 2008: 12.65 ft, moderate flooding; 5,940 cubic feet per secondJun 12, 2008: 14.17 ft, major flooding; 15,200 cubic feet per secondJul 24, 2009: 9.27 ft, minor flooding; 2,410 cubic feet per secondJul 24, 2010: 12.57 ft, moderate flooding; 8,690 cubic feet per secondMar 11, 2013: 9.98 ft, minor flooding; 3,108 cubic feet per secondJul 22, 2017: 12.59 ft, moderate flooding; 13,069 cubic feet per secondSep 13, 2019: 11.05 ft, moderate flooding; 4,563 cubic feet per secondSep 19, 2019: 13.73 ft, major flooding; 13,695 cubic feet per secondAug 19, 2025: 10.20 ft, minor floodingApr 18, 2026: 9.53 ft, minor flooding; 2,393 cubic feet per second Highest, 17.26 ft, Jul 16, 1950 1960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Platte River (WI) at Rockville 1940s: 8 8 1950s: 5 1960s: 8 1970s: 8 1980s: 8 1990s: 6 2000s: 6 2010s: 5 2020s: 2 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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 57 listed crests.

Highest listed crests, Platte River (WI) at Rockville
1Jul 16, 195017.26+8.26Major43,500
2Feb 21, 198515.54+6.54Major—
3Apr 25, 200815.15+6.15Major20,642
4Jun 29, 199014.85+5.85Major19,000
5Jun 12, 200814.17+5.17Major15,200
6Sep 19, 201913.73+4.73Major13,695
7Jan 24, 196713.42+4.42Major8,000
8Jun 21, 195413.33+4.33Major16,400
9Jun 17, 197813.16+4.16Major9,700
10Aug 6, 195112.81+3.81Moderate13,900
11Jun 8, 200812.65+3.65Moderate5,940
12Jul 22, 201712.59+3.59Moderate13,069
13Jul 24, 201012.57+3.57Moderate8,690
14Jun 13, 194712.30+3.30Moderate11,000
15Jun 2, 194312.10+3.10Moderate10,400
16Jul 18, 197711.47+2.47Moderate5,170
17Jan 5, 194611.40+2.40Moderate8,700
18Jan 27, 197411.29+2.29Moderate6,370
19Jul 9, 199311.17+2.17Moderate3,980
20Mar 22, 197511.16+2.16Moderate6,180
21Aug 21, 196611.13+2.13Moderate5,940
22Feb 28, 194811.10+2.10Moderate7,980
23Sep 13, 201911.05+2.05Moderate4,563
24Jul 14, 197210.97+1.97Minor5,550
25Jan 12, 196010.90+1.90Minor7,550
26Mar 16, 196310.86+1.86Minor6,140
27Feb 28, 196510.86+1.86Minor3,000
28Dec 30, 197210.83+1.83Minor5,250
29Feb 20, 195310.79+1.79Minor7,290
30Feb 18, 199710.79+1.79Minor—
31May 20, 195910.77+1.77Minor7,220
32Jun 29, 196910.70+1.70Minor4,980
33Jun 1, 200010.66+1.66Minor3,290
34Mar 31, 199810.60+1.60Minor3,220
35Jun 17, 200410.56+1.56Minor3,000
36Jun 15, 199110.47+1.47Minor3,350
37Mar 14, 194410.44+1.44Minor6,310
38Feb 19, 199410.40+1.40Minor2,860
39Jul 20, 196210.34+1.34Minor6,160
40Mar 11, 198910.34+1.34Minor3,210
41Mar 16, 198210.20+1.20Minor2,990
42Aug 19, 202510.20+1.20Minor—
43Aug 18, 197910.18+1.18Minor4,040
44Mar 11, 20139.98+0.98Minor3,108
45Mar 16, 19809.75+0.75Minor2,560
46Aug 4, 19829.68+0.68Minor2,440
47Sep 8, 19809.53+0.53Minor2,380
48Apr 18, 20269.53+0.53Minor2,393
49Mar 12, 19769.52+0.52Minor2,980
50Jan 16, 19809.52+0.52Minor2,370

Other gauges in Grant County

Flood gauges in Grant County
Burton18.026.45 ft, Jul 22, 201717
Muscoda9.011.48 ft, Sep 16, 19382

Grant County: every hazard · River floods across the country · Wisconsin

NOAA National Water Prediction Service, gauge RVLW3, 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.