Allegheny River at Sharpsburg Lock and Dam

Highest listed crest 26.90 ftFlood stage 21.0 ft5 crests since 1972

The Allegheny River at Sharpsburg Lock and Dam crested at major flood stage 1 time among the 5 crests the National Weather Service lists from 1972 to 2007. The highest, 26.90 ft on June 24, 1972, was major flooding, 5.90 feet above flood stage. 11 other gauges on the Allegheny River crested above flood stage within a week of it, 3 at their own highest listed crest.

The gauge

Highest listed crest: 26.90 ft; June 24, 1972
Flood stage: 21.0 ft; Major flooding from 23.0 ft
Crests at major: 1; 103rd of 170 gauges in Pennsylvania
Most recent flood crest: September 18, 2004; 22.10 ft, moderate flooding
Location: Allegheny County; Near Wilkinsburg (3.7 mi), Pittsburgh (4.6 mi), Penn Hills (4.6 mi)
Identifiers: NWS SHRP1; USGS 03049680

Flood stages

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

Flood categories, Allegheny River at Sharpsburg Lock and Dam

Action stage	16.3	1	Mar 16, 2007	The level at which the NWS or its partners begin to take action
Flood stage (minor)	21.0	0	—	Minimal or no property damage, but possibly some public threat
Moderate flood stage	22.0	2	Sep 18, 2004	Some inundation of structures and roads near the stream
Major flood stage	23.0	1	Jun 24, 1972	Extensive inundation of structures and roads

Every listed crest

5 crests from 1972 to 2007. Filled: at or above flood stage. Hover a crest for its date and stage.

Crests at or above flood stage, by decade

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.
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, Allegheny River at Sharpsburg Lock and Dam

1	Jun 24, 1972	26.90	+5.90	Major	—
2	Jan 20, 1996	22.90	+1.90	Moderate	—
3	Sep 18, 2004	22.10	+1.10	Moderate	184,700
4	Mar 16, 2007	18.50	−2.50	Action	146,060
5	Mar 24, 2007	16.20	−4.80	Below flood stage	103,140

The worst floods along the Allegheny River

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

June 24, 1972: 26.90 ft here, major flooding

EldredPA · Jun 23, 1972 · 29.10 ft · Major · its highest
Natrona Lock and DamPA · Jun 23, 1972 · 27.50 ft · Major
OleanNY · Jun 23, 1972 · 26.20 ft · Major · its highest
SalamancaNY · Jun 23, 1972 · 24.01 ft · Major · its highest
Kittanning Lock and DamPA · Jun 23, 1972 · 23.70 ft · Major
Freeport Lock and DamPA · Jun 23, 1972 · 24.50 ft · Moderate
Clinton Lock and DamPA · Jun 23, 1972 · 22.00 ft · Moderate
Mosgrove Lock and DamPA · Jun 23, 1972 · 21.70 ft · Moderate
C.W. Bill Young Lock and DamPA · Jun 23, 1972 · 20.90 ft · Moderate
ParkerPA · Jun 23, 1972 · 22.30 ft · Minor

January 20, 1996: 22.90 ft here, moderate flooding

Freeport Lock and DamPA · Jan 20, 1996 · 25.00 ft · Moderate
Kittanning Lock and DamPA · Jan 20, 1996 · 22.70 ft · Moderate
OleanNY · Jan 20, 1996 · 18.60 ft · Moderate
SalamancaNY · Jan 19, 1996 · 16.41 ft · Moderate
Natrona Lock and DamPA · Jan 20, 1996 · 23.10 ft · Minor
ParkerPA · Jan 20, 1996 · 20.30 ft · Minor
C.W. Bill Young Lock and DamPA · Jan 20, 1996 · 19.10 ft · Minor

September 18, 2004: 22.10 ft here, moderate flooding

Natrona Lock and DamPA · Sep 18, 2004 · 24.20 ft · Moderate
Freeport Lock and DamPA · Sep 18, 2004 · 24.10 ft · Moderate
Kittanning Lock and DamPA · Sep 18, 2004 · 22.20 ft · Moderate
Mosgrove Lock and DamPA · Sep 18, 2004 · 20.40 ft · Minor
C.W. Bill Young Lock and DamPA · Sep 18, 2004 · 19.80 ft · Minor
Rimer Lock and DamPA · Sep 18, 2004 · 19.50 ft · Minor

Gauges on the Allegheny River

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

Flood gauges on the Allegheny River

Eldred	PA	23.0	29.10 ft, Jun 23, 1972	2
Olean	NY	12.0	26.20 ft, Jun 23, 1972	2
Salamanca	NY	12.0	24.01 ft, Jun 23, 1972	1
Warren	PA	14.0	19.40 ft, Mar 17, 1865	6
West Hickory	PA	14.0	17.83 ft, Jan 25, 1964	3
Franklin	PA	17.0	26.00 ft, Feb 27, 1917	3
Parker	PA	20.0	29.60 ft, Jan 22, 1959	2
Rimer Lock and Dam	PA	19.0	21.80 ft, Jan 22, 1959	0
Mosgrove Lock and Dam	PA	19.0	27.70 ft, Mar 10, 1964	2
Kittanning Lock and Dam	PA	21.0	30.70 ft, Mar 26, 1913	6
Clinton Lock and Dam	PA	21.0	26.40 ft, Mar 18, 1936	1
Freeport Lock and Dam	PA	23.0	33.30 ft, Mar 18, 1936	1
Natrona Lock and Dam	PA	21.0	32.10 ft, Mar 18, 1936	5
C.W. Bill Young Lock and Dam	PA	17.0	31.10 ft, Mar 18, 1936	2
Sharpsburg Lock and Dam this gauge	PA	21.0	26.90 ft, Jun 24, 1972	1

Other gauges in Allegheny County

Flood gauges in Allegheny County

C.W. Bill Young Lock and Dam	17.0	31.10 ft, Mar 18, 1936	2
Natrona Lock and Dam	21.0	32.10 ft, Mar 18, 1936	5
Carnegie	20.0	25.05 ft, Sep 18, 2004	1
Girty's Run	11.0	13.56 ft, Jul 5, 2018	0
Etna	9.0	10.28 ft, May 30, 1986	0
Braddock Lock and Dam	22.0	35.30 ft, Mar 18, 1936	8
Elizabeth Lock and Dam	20.0	32.50 ft, Mar 18, 1936	9
Dashields Lock and Dam	25.0	42.80 ft, Mar 18, 1936	5
Pittsburgh	22.0	46.00 ft, Mar 18, 1936	22
Etna	13.0	14.60 ft, Sep 1, 2021	0
Turtle Creek	6.0	11.34 ft, Jun 18, 2009	1
Sutersville	20.0	32.50 ft, Oct 16, 1954	12

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

NOAA National Water Prediction Service, gauge SHRP1, 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.