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Bynum Run at Bel Air

Highest listed crest 11.15 ftFlood stage 9.0 ft27 crests since 1945

The Bynum Run at Bel Air crested above flood stage 6 times among the 27 crests the National Weather Service lists from 1945 to 2024. The highest, 11.15 ft on August 20, 2016, was minor flooding, 2.15 feet above flood stage.

The gauge

Highest listed crest
11.15 ft
August 20, 2016; 5,600 cubic feet per second
Flood stage
9.0 ft
Major flooding from 17.0 ft
Crests at major
0
6 above flood stage
Most recent flood crest
January 10, 2024
9.03 ft, minor flooding
Location
Harford County
Near Bel Air (1.0 mi), Aberdeen (8.5 mi), Havre de Grace (11.5 mi)

Flood stages

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

Flood categories, Bynum Run at Bel Air
Action stage6.021Sep 23, 2021The level at which the NWS or its partners begin to take action
Flood stage (minor)9.06Jan 10, 2024Minimal or no property damage, but possibly some public threat
Moderate flood stage13.00—Some inundation of structures and roads near the stream
Major flood stage17.00—Extensive inundation of structures and roads

Every listed crest

27 crests from 1945 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Bynum Run at Bel Air, 1945 to 2024 681012141618ft Flood stage 9.0 ftMajor 17.0 ft Jul 19, 1945: 6.25 ft, action stage; 3,620 cubic feet per secondJun 14, 1947: 6.01 ft, action stage; 1,920 cubic feet per secondSep 10, 1950: 6.18 ft, action stage; 3,080 cubic feet per secondNov 2, 1956: 6.04 ft, action stage; 1,700 cubic feet per secondSep 2, 1959: 6.05 ft, action stage; 1,700 cubic feet per secondAug 25, 1967: 6.56 ft, action stage; 1,280 cubic feet per secondJun 22, 1972: 8.32 ft, action stage; 4,650 cubic feet per secondSep 16, 1999: 9.91 ft, minor flooding; 3,550 cubic feet per secondMar 21, 2000: 6.06 ft, action stage; 1,490 cubic feet per secondSep 23, 2003: 7.49 ft, action stage; 2,200 cubic feet per secondJul 27, 2004: 6.24 ft, action stage; 1,580 cubic feet per secondJun 26, 2006: 9.23 ft, minor flooding; 3,150 cubic feet per secondNov 16, 2006: 6.49 ft, action stage; 1,700 cubic feet per secondJul 23, 2008: 6.01 ft, action stage; 1,470 cubic feet per secondSep 30, 2010: 8.36 ft, action stage; 2,670 cubic feet per secondAug 28, 2011: 7.02 ft, action stageJun 11, 2013: 7.11 ft, action stage; 2,010 cubic feet per secondApr 30, 2014: 7.75 ft, action stage; 2,340 cubic feet per secondFeb 24, 2016: 8.50 ft, action stage; 3,040 cubic feet per secondAug 20, 2016: 11.15 ft, minor flooding; 5,600 cubic feet per secondAug 18, 2017: 9.27 ft, minor flooding; 3,680 cubic feet per secondJul 27, 2018: 6.63 ft, action stage; 1,800 cubic feet per secondJul 11, 2019: 6.85 ft, action stage; 1,920 cubic feet per secondJun 4, 2021: 9.18 ft, minor flooding; 3,320 cubic feet per secondJul 13, 2021: 7.54 ft, action stage; 1,920 cubic feet per secondSep 23, 2021: 7.08 ft, action stage; 1,620 cubic feet per secondJan 10, 2024: 9.03 ft, minor flooding; 3,476 cubic feet per second Highest, 11.15 ft, Aug 20, 2016 19501960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Bynum Run at Bel Air 1940s: 0 1950s: 0 1960s: 0 1970s: 0 1980s: 0 1990s: 1 2000s: 1 2010s: 2 2 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

Highest listed crests, Bynum Run at Bel Air
1Aug 20, 201611.15+2.15Minor5,600
2Sep 16, 19999.91+0.91Minor3,550
3Aug 18, 20179.27+0.27Minor3,680
4Jun 26, 20069.23+0.23Minor3,150
5Jun 4, 20219.18+0.18Minor3,320
6Jan 10, 20249.03+0.03Minor3,476
7Feb 24, 20168.50−0.50Action3,040
8Sep 30, 20108.36−0.64Action2,670
9Jun 22, 19728.32−0.68Action4,650
10Apr 30, 20147.75−1.25Action2,340
11Jul 13, 20217.54−1.46Action1,920
12Sep 23, 20037.49−1.51Action2,200
13Jun 11, 20137.11−1.89Action2,010
14Sep 23, 20217.08−1.92Action1,620
15Aug 28, 20117.02−1.98Action—
16Jul 11, 20196.85−2.15Action1,920
17Jul 27, 20186.63−2.37Action1,800
18Aug 25, 19676.56−2.44Action1,280
19Nov 16, 20066.49−2.51Action1,700
20Jul 19, 19456.25−2.75Action3,620
21Jul 27, 20046.24−2.76Action1,580
22Sep 10, 19506.18−2.82Action3,080
23Mar 21, 20006.06−2.94Action1,490
24Sep 2, 19596.05−2.95Action1,700
25Nov 2, 19566.04−2.96Action1,700
26Jun 14, 19476.01−2.99Action1,920
27Jul 23, 20086.01−2.99Action1,470

Other gauges in Harford County

Flood gauges in Harford County
Chesapeake Bay at Havre de Grace (IN MLLW)4.06.93 ft, Jan 10, 20240
Rocks State Park11.017.70 ft, Aug 23, 19334
Darlington10.013.98 ft, Apr 30, 20140
Belcamp9.011.11 ft, Aug 31, 20180
Bel Air6.06.73 ft, Jun 3, 20210
Conowingo Dam23.536.83 ft, Jun 24, 19725
Bel Air9.011.35 ft, Jun 28, 20060
Benson9.011.60 ft, Jun 22, 19720

Harford County: every hazard · River floods across the country · Maryland

NOAA National Water Prediction Service, gauge BABM2, 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.