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Deer Creek (MD) at Rocks State Park

Highest listed crest 17.70 ftFlood stage 11.0 ft31 crests since 1926

The Deer Creek (MD) at Rocks State Park crested at major flood stage 4 times among the 31 crests the National Weather Service lists from 1926 to 2015. The highest, 17.70 ft on August 23, 1933, was major flooding, 6.70 feet above flood stage.

The gauge

Highest listed crest
17.70 ft
August 23, 1933; 13,600 cubic feet per second
Flood stage
11.0 ft
Major flooding from 15.0 ft
Crests at major
4
17th of 108 gauges in Maryland
Most recent flood crest
September 7, 2011
12.96 ft, minor flooding
Location
Harford County
Near Bel Air (7.2 mi), Aberdeen (14.5 mi)

Flood stages

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

Flood categories, Deer Creek (MD) at Rocks State Park
Action stage10.06Sep 30, 2015The level at which the NWS or its partners begin to take action
Flood stage (minor)11.012Sep 7, 2011Minimal or no property damage, but possibly some public threat
Moderate flood stage13.09Jan 19, 1996Some inundation of structures and roads near the stream
Major flood stage15.04Jun 22, 1972Extensive inundation of structures and roads

Every listed crest

31 crests from 1926 to 2015. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Deer Creek (MD) at Rocks State Park, 1926 to 2015 1012141618ft Flood stage 11.0 ftMajor 15.0 ft Nov 16, 1926: 15.45 ft, major flooding; 9,080 cubic feet per secondAug 17, 1928: 11.08 ft, minor flooding; 4,760 cubic feet per secondAug 23, 1933: 17.70 ft, major flooding; 13,600 cubic feet per secondSep 17, 1934: 15.90 ft, major flooding; 9,900 cubic feet per secondSep 4, 1935: 13.40 ft, moderate flooding; 6,600 cubic feet per secondJul 5, 1937: 13.20 ft, moderate flooding; 6,420 cubic feet per secondNov 13, 1937: 11.80 ft, minor flooding; 5,260 cubic feet per secondJun 23, 1941: 13.91 ft, moderate flooding; 7,100 cubic feet per secondNov 9, 1943: 11.16 ft, minor flooding; 4,820 cubic feet per secondJul 13, 1949: 11.53 ft, minor flooding; 5,040 cubic feet per secondAug 10, 1951: 13.23 ft, moderate flooding; 6,420 cubic feet per secondAug 18, 1955: 10.25 ft, action stage; 4,190 cubic feet per secondSep 10, 1968: 11.59 ft, minor flooding; 5,100 cubic feet per secondAug 2, 1971: 10.05 ft, action stage; 4,520 cubic feet per secondJun 22, 1972: 17.09 ft, major flooding; 12,200 cubic feet per secondJul 13, 1975: 10.67 ft, action stage; 4,950 cubic feet per secondJan 26, 1978: 13.44 ft, moderate flooding; 7,770 cubic feet per secondSep 22, 1979: 11.81 ft, minor flooding; 6,160 cubic feet per secondJul 1, 1984: 11.95 ft, minor flooding; 6,280 cubic feet per secondFeb 12, 1985: 13.73 ft, moderate flooding; 8,080 cubic feet per secondMay 6, 1989: 14.53 ft, moderate flooding; 8,950 cubic feet per secondNov 28, 1993: 14.08 ft, moderate flooding; 8,450 cubic feet per secondJan 19, 1996: 14.33 ft, moderate flooding; 8,730 cubic feet per secondJun 15, 2004: 12.21 ft, minor flooding; 6,510 cubic feet per secondJun 28, 2006: 12.51 ft, minor flooding; 6,810 cubic feet per secondNov 16, 2006: 12.29 ft, minor flooding; 6,590 cubic feet per secondSep 30, 2010: 12.57 ft, minor flooding; 6,870 cubic feet per secondSep 7, 2011: 12.96 ft, minor flooding; 7,260 cubic feet per secondJan 31, 2013: 10.27 ft, action stage; 5,020 cubic feet per secondApr 30, 2014: 10.53 ft, action stage; 5,200 cubic feet per secondSep 30, 2015: 10.55 ft, action stage; 5,210 cubic feet per second Highest, 17.70 ft, Aug 23, 1933 1940196019802000

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Deer Creek (MD) at Rocks State Park 1920s: 2 1930s: 5 5 1940s: 3 1950s: 1 1960s: 1 1970s: 3 1980s: 3 1990s: 2 2000s: 3 2010s: 2 1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s
  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, Deer Creek (MD) at Rocks State Park
1Aug 23, 193317.70+6.70Major13,600
2Jun 22, 197217.09+6.09Major12,200
3Sep 17, 193415.90+4.90Major9,900
4Nov 16, 192615.45+4.45Major9,080
5May 6, 198914.53+3.53Moderate8,950
6Jan 19, 199614.33+3.33Moderate8,730
7Nov 28, 199314.08+3.08Moderate8,450
8Jun 23, 194113.91+2.91Moderate7,100
9Feb 12, 198513.73+2.73Moderate8,080
10Jan 26, 197813.44+2.44Moderate7,770
11Sep 4, 193513.40+2.40Moderate6,600
12Aug 10, 195113.23+2.23Moderate6,420
13Jul 5, 193713.20+2.20Moderate6,420
14Sep 7, 201112.96+1.96Minor7,260
15Sep 30, 201012.57+1.57Minor6,870
16Jun 28, 200612.51+1.51Minor6,810
17Nov 16, 200612.29+1.29Minor6,590
18Jun 15, 200412.21+1.21Minor6,510
19Jul 1, 198411.95+0.95Minor6,280
20Sep 22, 197911.81+0.81Minor6,160
21Nov 13, 193711.80+0.80Minor5,260
22Sep 10, 196811.59+0.59Minor5,100
23Jul 13, 194911.53+0.53Minor5,040
24Nov 9, 194311.16+0.16Minor4,820
25Aug 17, 192811.08+0.08Minor4,760
26Jul 13, 197510.67−0.33Action4,950
27Sep 30, 201510.55−0.45Action5,210
28Apr 30, 201410.53−0.47Action5,200
29Jan 31, 201310.27−0.73Action5,020
30Aug 18, 195510.25−0.75Action4,190
31Aug 2, 197110.05−0.95Action4,520

Gauges on the Deer Creek (MD)

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Deer Creek (MD)
Rocks State Park this gaugeMD11.017.70 ft, Aug 23, 19334
DarlingtonMD10.013.98 ft, Apr 30, 20140

Other gauges in Harford County

Flood gauges in Harford County
Bel Air9.011.15 ft, Aug 20, 20160
Chesapeake Bay at Havre de Grace (IN MLLW)4.06.93 ft, Jan 10, 20240
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 RSPM2, 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.