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Susquehanna River at Marietta

Highest listed crest 64.54 ftFlood stage 49.0 ft38 crests since 1889

The Susquehanna River at Marietta crested at major flood stage 9 times among the 38 crests the National Weather Service lists from 1889 to 2020. The highest, 64.54 ft on June 23, 1972, was major flooding, 15.54 feet above flood stage. 11 other gauges on the Susquehanna River crested above flood stage within a week of it, 5 at their own highest listed crest.

The gauge

Highest listed crest
64.54 ft
June 23, 1972; 1,080,000 cubic feet per second
Flood stage
49.0 ft
Major flooding from 54.0 ft
Crests at major
9
17th of 170 gauges in Pennsylvania
Most recent flood crest
December 27, 2020
49.61 ft, minor flooding
Location
Lancaster County
Near Columbia (2.3 mi), Elizabethtown (7.7 mi), Lancaster (12.2 mi)

Flood stages

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

Flood categories, Susquehanna River at Marietta
Action stage44.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)49.021Dec 27, 2020Minimal or no property damage, but possibly some public threat
Moderate flood stage52.08Mar 12, 2011Some inundation of structures and roads near the stream
Major flood stage54.09Sep 9, 2011Extensive inundation of structures and roads

Every listed crest

38 crests from 1889 to 2020. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Susquehanna River at Marietta, 1889 to 2020 4550556065ft Flood stage 49.0 ftMajor 54.0 ft Jun 2, 1889: 58.30 ft, major flooding; 630,000 cubic feet per secondAug 25, 1933: 49.44 ft, minor floodingMar 19, 1936: 60.73 ft, major flooding; 787,000 cubic feet per secondApr 2, 1940: 53.33 ft, moderate floodingMay 24, 1942: 49.63 ft, minor floodingJan 1, 1943: 53.20 ft, moderate floodingMay 29, 1946: 54.90 ft, major floodingApr 16, 1948: 49.67 ft, minor floodingMar 30, 1950: 49.29 ft, minor floodingNov 27, 1950: 52.96 ft, moderate floodingMar 13, 1952: 50.33 ft, minor floodingMar 10, 1956: 50.25 ft, minor floodingApr 2, 1960: 51.31 ft, minor floodingFeb 27, 1961: 51.82 ft, minor floodingMar 12, 1964: 54.03 ft, major floodingApr 4, 1970: 50.47 ft, minor floodingJun 23, 1972: 64.54 ft, major flooding; 1,080,000 cubic feet per secondSep 27, 1975: 55.73 ft, major floodingMar 7, 1979: 53.21 ft, moderate floodingFeb 24, 1981: 49.56 ft, minor floodingFeb 16, 1984: 53.49 ft, moderate floodingMar 16, 1986: 51.52 ft, minor floodingApr 3, 1993: 53.22 ft, moderate floodingApr 12, 1993: 49.46 ft, minor floodingMar 26, 1994: 51.01 ft, minor floodingJan 21, 1996: 56.80 ft, major flooding; 600,500 cubic feet per secondJan 28, 1996: 49.78 ft, minor flooding; 323,000 cubic feet per secondJan 10, 1998: 50.20 ft, minor floodingSep 19, 2004: 56.27 ft, major flooding; 577,000 cubic feet per secondJan 16, 2005: 49.10 ft, minor floodingMar 30, 2005: 50.25 ft, minor floodingApr 4, 2005: 51.71 ft, minor floodingJun 29, 2006: 52.53 ft, moderate floodingMar 12, 2011: 52.86 ft, moderate flooding; 434,400 cubic feet per secondApr 29, 2011: 51.15 ft, minor flooding; 370,500 cubic feet per secondSep 9, 2011: 58.16 ft, major flooding; 665,000 cubic feet per secondJul 26, 2018: 50.93 ft, minor flooding; 362,200 cubic feet per secondDec 27, 2020: 49.61 ft, minor flooding; 317,309 cubic feet per second Highest, 64.54 ft, Jun 23, 1972 1900192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Susquehanna River at Marietta 1880s: 1 1890s: 0 1900s: 0 1910s: 0 1920s: 0 1930s: 2 1940s: 5 1950s: 4 1960s: 3 1970s: 4 1980s: 3 1990s: 6 6 2000s: 5 2010s: 4 2020s: 1 1880s1900s1920s1940s1960s1980s2000s2020s
  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, Susquehanna River at Marietta
1Jun 23, 197264.54+15.54Major1,080,000
2Mar 19, 193660.73+11.73Major787,000
3Jun 2, 188958.30+9.30Major630,000
4Sep 9, 201158.16+9.16Major665,000
5Jan 21, 199656.80+7.80Major600,500
6Sep 19, 200456.27+7.27Major577,000
7Sep 27, 197555.73+6.73Major—
8May 29, 194654.90+5.90Major—
9Mar 12, 196454.03+5.03Major—
10Feb 16, 198453.49+4.49Moderate—
11Apr 2, 194053.33+4.33Moderate—
12Apr 3, 199353.22+4.22Moderate—
13Mar 7, 197953.21+4.21Moderate—
14Jan 1, 194353.20+4.20Moderate—
15Nov 27, 195052.96+3.96Moderate—
16Mar 12, 201152.86+3.86Moderate434,400
17Jun 29, 200652.53+3.53Moderate—
18Feb 27, 196151.82+2.82Minor—
19Apr 4, 200551.71+2.71Minor—
20Mar 16, 198651.52+2.52Minor—
21Apr 2, 196051.31+2.31Minor—
22Apr 29, 201151.15+2.15Minor370,500
23Mar 26, 199451.01+2.01Minor—
24Jul 26, 201850.93+1.93Minor362,200
25Apr 4, 197050.47+1.47Minor—
26Mar 13, 195250.33+1.33Minor—
27Mar 10, 195650.25+1.25Minor—
28Mar 30, 200550.25+1.25Minor—
29Jan 10, 199850.20+1.20Minor—
30Jan 28, 199649.78+0.78Minor323,000
31Apr 16, 194849.67+0.67Minor—
32May 24, 194249.63+0.63Minor—
33Dec 27, 202049.61+0.61Minor317,309
34Feb 24, 198149.56+0.56Minor—
35Apr 12, 199349.46+0.46Minor—
36Aug 25, 193349.44+0.44Minor—
37Mar 30, 195049.29+0.29Minor—
38Jan 16, 200549.10+0.10Minor—

The worst floods along the Susquehanna River

For this gauge's highest crests, the other gauges on the Susquehanna River that crested above flood stage within a week.

June 23, 1972: 64.54 ft here, major flooding

  • MeshoppenPA · Jun 23, 1972 · 43.51 ft · Major
  • Wilkes BarrePA · Jun 24, 1972 · 40.91 ft · Major
  • Conowingo DamMD · Jun 24, 1972 · 36.83 ft · Major · its highest
  • SunburyPA · Jun 24, 1972 · 35.80 ft · Major · its highest
  • TowandaPA · Jun 24, 1972 · 33.43 ft · Major · its highest
  • HarrisburgPA · Jun 24, 1972 · 33.27 ft · Major · its highest
  • DanvillePA · Jun 24, 1972 · 32.32 ft · Major · its highest
  • BloomsburgPA · Jun 25, 1972 · 31.20 ft · Major
  • WaverlyPA · Jun 23, 1972 · 21.24 ft · Major
  • VestalNY · Jun 23, 1972 · 22.35 ft · Moderate

March 19, 1936: 60.73 ft here, major flooding

  • Wilkes BarrePA · Mar 20, 1936 · 33.07 ft · Major
  • VestalNY · Mar 18, 1936 · 30.50 ft · Major
  • HarrisburgPA · Mar 19, 1936 · 29.23 ft · Major
  • BinghamtonNY · Mar 18, 1936 · 22.90 ft · Major
  • WaverlyPA · Mar 18, 1936 · 21.40 ft · Major
  • UnadillaNY · Mar 18, 1936 · 16.60 ft · Major
  • DanvillePA · Mar 19, 1936 · 28.01 ft · Moderate
  • BloomsburgPA · Mar 19, 1936 · 27.80 ft · Moderate
  • SunburyPA · Mar 19, 1936 · 26.85 ft · Moderate
  • TowandaPA · Mar 19, 1936 · 25.03 ft · Moderate

June 2, 1889: 58.30 ft here, major flooding

Gauges on the Susquehanna River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Susquehanna River
BainbridgeNY15.027.05 ft, Jun 29, 20062
BinghamtonNY14.025.73 ft, Sep 8, 201112
BloomsburgPA19.032.75 ft, Sep 9, 20115
ConklinNY12.025.02 ft, Jun 28, 20062
Conowingo DamMD23.536.83 ft, Jun 24, 19725
DanvillePA20.032.32 ft, Jun 24, 19723
HarrisburgPA17.033.27 ft, Jun 24, 19728
Marietta this gaugePA49.064.54 ft, Jun 23, 19729
MeshoppenPA27.044.48 ft, Sep 8, 20112
OwegoNY30.039.62 ft, Sep 8, 20113
SidneyNY979.5988.30 ft, Jun 28, 20062
SunburyPA24.035.80 ft, Jun 24, 19721
TowandaPA16.033.43 ft, Jun 24, 19723
UnadillaNY11.017.72 ft, Jun 29, 20065
VestalNY18.035.26 ft, Sep 8, 20118
Wilkes BarrePA22.042.66 ft, Sep 9, 201115
WindsorNY17.024.27 ft, Jun 29, 20063
WaverlyPA13.026.67 ft, Sep 8, 20117

Other gauges in Lancaster County

Flood gauges in Lancaster County
Manheim8.09.60 ft, Sep 2, 20210
Ephrata8.011.63 ft, Aug 22, 20180
Lancaster11.027.90 ft, Jun 23, 19729
Mt. Joy12.014.40 ft, Jul 25, 20180

Lancaster County: every hazard · River floods across the country · Pennsylvania

NOAA National Water Prediction Service, gauge MRTP1, 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.