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West Branch Middle Brook near Martinsville

Highest listed crest 11.47 ftFlood stage 6.0 ft8 crests since 1990

The West Branch Middle Brook near Martinsville crested above flood stage 6 times among the 8 crests the National Weather Service lists from 1990 to 2021. The highest, 11.47 ft on September 2, 2021, was minor flooding, 5.47 feet above flood stage.

The gauge

Highest listed crest
11.47 ft
September 2, 2021; 2,410 cubic feet per second
Flood stage
6.0 ft
No major stage set
Crests at major
0
6 above flood stage
Most recent flood crest
September 2, 2021
11.47 ft, minor flooding
Location
Somerset County
Near Somerville (3.1 mi), Bound Brook (4.2 mi), Manville (4.9 mi)

Flood stages

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

Flood categories, West Branch Middle Brook near Martinsville
Action stage5.01Apr 30, 2014The level at which the NWS or its partners begin to take action
Flood stage (minor)6.06Sep 2, 2021Minimal or no property damage, but possibly some public threat

Every listed crest

8 crests from 1990 to 2021. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the West Branch Middle Brook near Martinsville, 1990 to 2021 4681012ft Flood stage 6.0 ft May 16, 1990: 6.20 ft, minor floodingOct 19, 1996: 6.90 ft, minor floodingSep 16, 1999: 9.30 ft, minor flooding; 1,490 cubic feet per secondAug 12, 2000: 7.86 ft, minor flooding; 981 cubic feet per secondMay 13, 2002: 4.80 ft, below flood stage; 236 cubic feet per secondOct 8, 2005: 7.32 ft, minor flooding; 819 cubic feet per secondApr 30, 2014: 5.33 ft, action stage; 402 cubic feet per secondSep 2, 2021: 11.47 ft, minor flooding; 2,410 cubic feet per second Highest, 11.47 ft, Sep 2, 2021 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, West Branch Middle Brook near Martinsville 1990s: 3 3 2000s: 2 2010s: 0 2020s: 1 1990s2000s2010s2020s
  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, West Branch Middle Brook near Martinsville
1Sep 2, 202111.47+5.47Minor2,410
2Sep 16, 19999.30+3.30Minor1,490
3Aug 12, 20007.86+1.86Minor981
4Oct 8, 20057.32+1.32Minor819
5Oct 19, 19966.90+0.90Minor—
6May 16, 19906.20+0.20Minor—
7Apr 30, 20145.33−0.67Action402
8May 13, 20024.80−1.20Below flood stage236

Other gauges in Somerset County

Flood gauges in Somerset County
Seeley Mills5.59.05 ft, Sep 2, 20210
Burnt Mills11.016.79 ft, Sep 2, 20214
Bound Brook11.020.66 ft, Sep 2, 20210
Burnt Mills9.512.76 ft, Sep 2, 20211
Blackwells Mills9.021.24 ft, Aug 28, 201111
Griggstown10.024.21 ft, Aug 28, 201114
Millstone10.022.45 ft, Sep 2, 20216
Weston11.523.75 ft, Sep 2, 20217
North Branch Village12.321.53 ft, Sep 16, 19990
South Branch8.020.26 ft, Sep 2, 202114
Far Hills6.07.60 ft, Jul 23, 19190
Raritan10.019.52 ft, Sep 2, 20216
Millington8.010.26 ft, Aug 29, 20112
Bound Brook28.042.13 ft, Sep 17, 199913
Manville14.027.66 ft, Sep 2, 202110
North Plainfield7.010.65 ft, Aug 2, 19730
Watchung14.024.50 ft, Aug 2, 19730

Somerset County: every hazard · River floods across the country · New Jersey

NOAA National Water Prediction Service, gauge MRTN4, 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.