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Nickajack Creek at US Highway 78 and 278 near Mableton

Highest listed crest 19.85 ftFlood stage 10.0 ft27 crests since 1995

The Nickajack Creek at US Highway 78 and 278 near Mableton crested above flood stage 27 times among the 27 crests the National Weather Service lists from 1995 to 2026. The highest, 19.85 ft on September 22, 2009, was moderate flooding, 9.85 feet above flood stage.

The gauge

Highest listed crest
19.85 ft
September 22, 2009; 14,591 cubic feet per second
Flood stage
10.0 ft
Major flooding from 21.0 ft
Crests at major
0
27 above flood stage
Most recent flood crest
September 12, 2026
11.05 ft, minor flooding
Location
Cobb County
Near Mableton (3.3 mi), Smyrna (4.1 mi), Atlanta (6.3 mi)

Flood stages

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

Flood categories, Nickajack Creek at US Highway 78 and 278 near Mableton
Action stage8.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)10.025Sep 12, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage16.02Sep 22, 2009Some inundation of structures and roads near the stream
Major flood stage21.00—Extensive inundation of structures and roads

Every listed crest

27 crests from 1995 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Nickajack Creek at US Highway 78 and 278 near Mableton, 1995 to 2026 10121416182022ft Flood stage 10.0 ftMajor 21.0 ft Oct 5, 1995: 13.37 ft, minor floodingMar 8, 1998: 13.62 ft, minor floodingJul 1, 1999: 12.50 ft, minor flooding; 3,970 cubic feet per secondMay 16, 2003: 13.65 ft, minor flooding; 5,220 cubic feet per secondSep 17, 2004: 13.52 ft, minor flooding; 5,070 cubic feet per secondJul 11, 2005: 16.60 ft, moderate flooding; 9,300 cubic feet per secondSep 22, 2009: 19.85 ft, moderate flooding; 14,591 cubic feet per secondOct 12, 2009: 11.76 ft, minor flooding; 3,288 cubic feet per secondNov 11, 2009: 12.50 ft, minor flooding; 3,970 cubic feet per secondDec 2, 2009: 10.24 ft, minor flooding; 2,153 cubic feet per secondDec 18, 2009: 10.71 ft, minor flooding; 2,471 cubic feet per secondMay 3, 2010: 13.38 ft, minor flooding; 4,915 cubic feet per secondJul 21, 2013: 10.32 ft, minor flooding; 2,027 cubic feet per secondApr 7, 2014: 11.55 ft, minor flooding; 3,040 cubic feet per secondDec 24, 2015: 11.02 ft, minor flooding; 2,568 cubic feet per secondNov 13, 2018: 10.24 ft, minor flooding; 1,973 cubic feet per secondDec 29, 2018: 11.16 ft, minor flooding; 2,691 cubic feet per secondApr 19, 2019: 10.43 ft, minor flooding; 2,102 cubic feet per secondFeb 6, 2020: 10.64 ft, minor flooding; 2,262 cubic feet per secondSep 17, 2020: 10.94 ft, minor flooding; 2,502 cubic feet per secondOct 11, 2020: 10.95 ft, minor flooding; 2,510 cubic feet per secondDec 30, 2021: 10.24 ft, minor flooding; 1,973 cubic feet per secondJan 4, 2023: 10.29 ft, minor floodingAug 30, 2023: 11.95 ft, minor flooding; 3,440 cubic feet per secondSep 27, 2024: 15.83 ft, minor flooding; 8,162 cubic feet per secondFeb 13, 2025: 10.95 ft, minor flooding; 2,510 cubic feet per secondSep 12, 2026: 11.05 ft, minor flooding; 2,594 cubic feet per second Highest, 19.85 ft, Sep 22, 2009 200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Nickajack Creek at US Highway 78 and 278 near Mableton 1990s: 3 2000s: 8 2010s: 7 2020s: 9 9 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, Nickajack Creek at US Highway 78 and 278 near Mableton
1Sep 22, 200919.85+9.85Moderate14,591
2Jul 11, 200516.60+6.60Moderate9,300
3Sep 27, 202415.83+5.83Minor8,162
4May 16, 200313.65+3.65Minor5,220
5Mar 8, 199813.62+3.62Minor—
6Sep 17, 200413.52+3.52Minor5,070
7May 3, 201013.38+3.38Minor4,915
8Oct 5, 199513.37+3.37Minor—
9Jul 1, 199912.50+2.50Minor3,970
10Nov 11, 200912.50+2.50Minor3,970
11Aug 30, 202311.95+1.95Minor3,440
12Oct 12, 200911.76+1.76Minor3,288
13Apr 7, 201411.55+1.55Minor3,040
14Dec 29, 201811.16+1.16Minor2,691
15Sep 12, 202611.05+1.05Minor2,594
16Dec 24, 201511.02+1.02Minor2,568
17Oct 11, 202010.95+0.95Minor2,510
18Feb 13, 202510.95+0.95Minor2,510
19Sep 17, 202010.94+0.94Minor2,502
20Dec 18, 200910.71+0.71Minor2,471
21Feb 6, 202010.64+0.64Minor2,262
22Apr 19, 201910.43+0.43Minor2,102
23Jul 21, 201310.32+0.32Minor2,027
24Jan 4, 202310.29+0.29Minor—
25Dec 2, 200910.24+0.24Minor2,153
26Nov 13, 201810.24+0.24Minor1,973
27Dec 30, 202110.24+0.24Minor1,973

Other gauges in Cobb County

Flood gauges in Cobb County
Stilesboro Road near Acworth13.023.90 ft, Sep 21, 20091
Mack Dobbs Road near Kennesaw11.014.27 ft, Sep 21, 20090
US 41 at Atlanta14.028.59 ft, Sep 22, 20095
Chastain Meadows Parkway near Kennesaw11.011.94 ft, Sep 27, 20240
Hawkins Store Road near Blackwells11.017.31 ft, Sep 21, 20090
Shallowford River near Woodstock10.019.66 ft, Sep 21, 20091
Powder Springs Road near Powder Springs11.023.20 ft, Sep 22, 20091
Clay Road near Austell12.027.40 ft, Sep 22, 20091
Powder Springs11.019.82 ft, Sep 21, 20090
Interstate North Parkway near Smyrna14.014.67 ft, Sep 8, 20210
GA 120 near Marietta11.013.26 ft, Sep 21, 20090
Lower Roswell Road near Marietta12.021.10 ft, Mar 30, 19776
Brownsville Road near Powder Springs13.031.45 ft, Sep 21, 20091
Northwest Austell19.037.04 ft, Sep 22, 20091
GA 120 near Roswell12.014.70 ft, Sep 21, 20090

Cobb County: every hazard · River floods across the country · Georgia

NOAA National Water Prediction Service, gauge NICG1, 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.