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Hydrograph River at a Glance Download
Allegheny River at Freeport Lock and Dam Pool (ft)Flow (kcfs)Observed: 11.71 ft at 11:15AM Mar 25, 2024Observed: 11.71 ft at 11:30AM Mar 25, 2024Observed: 11.71 ft at 11:45AM Mar 25, 2024Observed: 11.66 ft at 12:00PM Mar 25, 2024Observed: 11.65 ft at 12:15PM Mar 25, 2024Observed: 11.65 ft at 12:30PM Mar 25, 2024Observed: 11.64 ft at 12:45PM Mar 25, 2024Observed: 11.7 ft at 1:00PM Mar 25, 2024Observed: 11.67 ft at 1:15PM Mar 25, 2024Observed: 11.68 ft at 1:30PM Mar 25, 2024Observed: 11.63 ft at 1:45PM Mar 25, 2024Observed: 11.63 ft at 2:00PM Mar 25, 2024Observed: 11.63 ft at 2:15PM Mar 25, 2024Observed: 11.58 ft at 2:30PM Mar 25, 2024Observed: 11.54 ft at 2:45PM Mar 25, 2024Observed: 11.57 ft at 3:00PM Mar 25, 2024Observed: 11.54 ft at 3:15PM Mar 25, 2024Observed: 11.53 ft at 3:30PM Mar 25, 2024Observed: 11.47 ft at 3:45PM Mar 25, 2024Observed: 11.47 ft at 4:00PM Mar 25, 2024Observed: 11.42 ft at 4:15PM Mar 25, 2024Observed: 11.39 ft at 4:30PM Mar 25, 2024Observed: 11.41 ft at 4:45PM Mar 25, 2024Observed: 11.35 ft at 5:00PM Mar 25, 2024Observed: 11.33 ft at 5:15PM Mar 25, 2024Observed: 11.3 ft at 5:30PM Mar 25, 2024Observed: 11.28 ft at 5:45PM Mar 25, 2024Observed: 11.3 ft at 6:00PM Mar 25, 2024Observed: 11.27 ft at 6:15PM Mar 25, 2024Observed: 11.27 ft at 6:30PM Mar 25, 2024Observed: 11.22 ft at 6:45PM Mar 25, 2024Observed: 11.22 ft at 7:00PM Mar 25, 2024Observed: 11.2 ft at 7:15PM Mar 25, 2024Observed: 11.24 ft at 7:30PM Mar 25, 2024Observed: 11.25 ft at 7:45PM Mar 25, 2024Observed: 11.25 ft at 8:00PM Mar 25, 2024Observed: 11.25 ft at 8:15PM Mar 25, 2024Observed: 11.28 ft at 8:30PM Mar 25, 2024Observed: 11.25 ft at 8:45PM Mar 25, 2024Observed: 11.3 ft at 9:00PM Mar 25, 2024Observed: 11.32 ft at 9:15PM Mar 25, 2024Observed: 11.32 ft at 9:30PM Mar 25, 2024Observed: 11.31 ft at 9:45PM Mar 25, 2024Observed: 11.38 ft at 10:00PM Mar 25, 2024Observed: 11.37 ft at 10:15PM Mar 25, 2024Observed: 11.35 ft at 10:30PM Mar 25, 2024Observed: 11.41 ft at 10:45PM Mar 25, 2024Observed: 11.39 ft at 11:00PM Mar 25, 2024Observed: 11.44 ft at 11:15PM Mar 25, 2024Observed: 11.41 ft at 11:30PM Mar 25, 2024Observed: 11.43 ft at 11:45PM Mar 25, 2024Observed: 11.49 ft at 12:00AM Mar 26, 2024Observed: 11.46 ft at 12:15AM Mar 26, 2024Observed: 11.5 ft at 12:30AM Mar 26, 2024Observed: 11.45 ft at 12:45AM Mar 26, 2024Observed: 11.46 ft at 1:00AM Mar 26, 2024Observed: 11.46 ft at 1:15AM Mar 26, 2024Observed: 11.47 ft at 1:30AM Mar 26, 2024Observed: 11.47 ft at 1:45AM Mar 26, 2024Observed: 11.47 ft at 2:00AM Mar 26, 2024Observed: 11.48 ft at 2:15AM Mar 26, 2024Observed: 11.5 ft at 2:30AM Mar 26, 2024Observed: 11.46 ft at 2:45AM Mar 26, 2024Observed: 11.49 ft at 3:00AM Mar 26, 2024Observed: 11.49 ft at 3:15AM Mar 26, 2024Observed: 11.47 ft at 3:30AM Mar 26, 2024Observed: 11.42 ft at 3:45AM Mar 26, 2024Observed: 11.46 ft at 4:00AM Mar 26, 2024Observed: 11.41 ft at 4:15AM Mar 26, 2024Observed: 11.43 ft at 4:30AM Mar 26, 2024Observed: 11.42 ft at 4:45AM Mar 26, 2024Observed: 11.43 ft at 5:00AM Mar 26, 2024Observed: 11.44 ft at 5:15AM Mar 26, 2024Observed: 11.45 ft at 5:30AM Mar 26, 2024Observed: 11.45 ft at 5:45AM Mar 26, 2024Observed: 11.4 ft at 6:00AM Mar 26, 2024Observed: 11.45 ft at 6:15AM Mar 26, 2024Observed: 11.47 ft at 6:30AM Mar 26, 2024Observed: 11.42 ft at 6:45AM Mar 26, 2024Observed: 11.46 ft at 7:00AM Mar 26, 2024Observed: 11.45 ft at 7:15AM Mar 26, 2024Observed: 11.45 ft at 7:30AM Mar 26, 2024Observed: 11.46 ft at 7:45AM Mar 26, 2024Observed: 11.53 ft at 8:00AM Mar 26, 2024Observed: 11.49 ft at 8:15AM Mar 26, 2024Observed: 11.49 ft at 8:30AM Mar 26, 2024Observed: 11.49 ft at 8:45AM Mar 26, 2024Observed: 11.49 ft at 9:00AM Mar 26, 2024Observed: 11.54 ft at 9:15AM Mar 26, 2024Observed: 11.55 ft at 9:30AM Mar 26, 2024Observed: 11.56 ft at 9:45AM Mar 26, 2024Observed: 11.57 ft at 10:00AM Mar 26, 2024Observed: 11.5 ft at 10:15AM Mar 26, 2024Observed: 11.56 ft at 10:30AM Mar 26, 2024Observed: 11.56 ft at 10:45AM Mar 26, 2024Observed: 11.51 ft at 11:00AM Mar 26, 2024Observed: 11.5 ft at 11:15AM Mar 26, 2024Observed: 11.53 ft at 11:30AM Mar 26, 2024Observed: 11.5 ft at 11:45AM Mar 26, 2024Observed: 11.48 ft at 12:00PM Mar 26, 2024Observed: 11.53 ft at 12:15PM Mar 26, 2024Observed: 11.5 ft at 12:30PM Mar 26, 2024Observed: 11.48 ft at 12:45PM Mar 26, 2024Observed: 11.43 ft at 1:00PM Mar 26, 2024Observed: 11.41 ft at 1:15PM Mar 26, 2024Observed: 11.43 ft at 1:30PM Mar 26, 2024Observed: 11.42 ft at 1:45PM Mar 26, 2024Observed: 11.36 ft at 2:00PM Mar 26, 2024Observed: 11.35 ft at 2:15PM Mar 26, 2024Observed: 11.36 ft at 2:30PM Mar 26, 2024Observed: 11.29 ft at 2:45PM Mar 26, 2024Observed: 11.27 ft at 3:00PM Mar 26, 2024Observed: 11.26 ft at 3:15PM Mar 26, 2024Observed: 11.26 ft at 3:30PM Mar 26, 2024Observed: 11.23 ft at 3:45PM Mar 26, 2024Observed: 11.26 ft at 4:00PM Mar 26, 2024Observed: 11.24 ft at 4:15PM Mar 26, 2024Observed: 11.2 ft at 4:30PM Mar 26, 2024Observed: 11.21 ft at 4:45PM Mar 26, 2024Observed: 11.19 ft at 5:00PM Mar 26, 2024Observed: 11.19 ft at 5:15PM Mar 26, 2024Observed: 11.16 ft at 5:30PM Mar 26, 2024Observed: 11.15 ft at 5:45PM Mar 26, 2024Observed: 11.14 ft at 6:00PM Mar 26, 2024Observed: 11.15 ft at 6:15PM Mar 26, 2024Observed: 11.16 ft at 6:30PM Mar 26, 2024Observed: 11.13 ft at 6:45PM Mar 26, 2024Observed: 11.09 ft at 7:00PM Mar 26, 2024Observed: 11.15 ft at 7:15PM Mar 26, 2024Observed: 11.11 ft at 7:30PM Mar 26, 2024Observed: 11.1 ft at 7:45PM Mar 26, 2024Observed: 11.18 ft at 8:00PM Mar 26, 2024Observed: 11.17 ft at 8:15PM Mar 26, 2024Observed: 11.21 ft at 8:30PM Mar 26, 2024Observed: 11.23 ft at 8:45PM Mar 26, 2024Observed: 11.24 ft at 9:00PM Mar 26, 2024Observed: 11.22 ft at 9:15PM Mar 26, 2024Observed: 11.29 ft at 9:30PM Mar 26, 2024Observed: 11.28 ft at 9:45PM Mar 26, 2024Observed: 11.31 ft at 10:00PM Mar 26, 2024Observed: 11.31 ft at 10:15PM Mar 26, 2024Observed: 11.33 ft at 10:30PM Mar 26, 2024Observed: 11.35 ft at 10:45PM Mar 26, 2024Observed: 11.42 ft at 11:00PM Mar 26, 2024Observed: 11.44 ft at 11:15PM Mar 26, 2024Observed: 11.43 ft at 11:30PM Mar 26, 2024Observed: 11.45 ft at 11:45PM Mar 26, 2024Observed: 11.44 ft at 12:00AM Mar 27, 2024Observed: 11.48 ft at 12:15AM Mar 27, 2024Observed: 11.47 ft at 12:30AM Mar 27, 2024Observed: 11.49 ft at 12:45AM Mar 27, 2024Observed: 11.49 ft at 1:00AM Mar 27, 2024Observed: 11.55 ft at 1:15AM Mar 27, 2024Observed: 11.56 ft at 1:30AM Mar 27, 2024Observed: 11.52 ft at 1:45AM Mar 27, 2024Observed: 11.54 ft at 2:00AM Mar 27, 2024Observed: 11.6 ft at 2:15AM Mar 27, 2024Observed: 11.56 ft at 2:30AM Mar 27, 2024Observed: 11.61 ft at 2:45AM Mar 27, 2024Observed: 11.63 ft at 3:00AM Mar 27, 2024Observed: 11.57 ft at 3:15AM Mar 27, 2024Observed: 11.62 ft at 3:30AM Mar 27, 2024Observed: 11.64 ft at 3:45AM Mar 27, 2024Observed: 11.65 ft at 4:00AM Mar 27, 2024Observed: 11.64 ft at 4:15AM Mar 27, 2024Observed: 11.6 ft at 4:30AM Mar 27, 2024Observed: 11.63 ft at 4:45AM Mar 27, 2024Observed: 11.62 ft at 5:00AM Mar 27, 2024Observed: 11.63 ft at 5:15AM Mar 27, 2024Observed: 11.68 ft at 5:30AM Mar 27, 2024Observed: 11.69 ft at 5:45AM Mar 27, 2024Observed: 11.68 ft at 6:00AM Mar 27, 2024Observed: 11.68 ft at 6:15AM Mar 27, 2024Observed: 11.71 ft at 6:30AM Mar 27, 2024Observed: 11.68 ft at 6:45AM Mar 27, 2024Observed: 11.69 ft at 7:00AM Mar 27, 2024Observed: 11.73 ft at 7:15AM Mar 27, 2024Observed: 11.75 ft at 7:30AM Mar 27, 2024Observed: 11.79 ft at 7:45AM Mar 27, 2024Observed: 11.79 ft at 8:00AM Mar 27, 2024Observed: 11.81 ft at 8:15AM Mar 27, 2024Observed: 11.8 ft at 8:30AM Mar 27, 2024Observed: 11.82 ft at 8:45AM Mar 27, 2024Observed: 11.85 ft at 9:00AM Mar 27, 2024Observed: 11.91 ft at 9:30AM Mar 27, 2024Observed: 11.87 ft at 9:45AM Mar 27, 2024Observed: 11.94 ft at 10:00AM Mar 27, 2024Observed: 11.91 ft at 10:15AM Mar 27, 2024Observed: 11.97 ft at 10:30AM Mar 27, 2024Observed: 11.95 ft at 10:45AM Mar 27, 2024Observed: 11.99 ft at 11:00AM Mar 27, 2024Observed: 12 ft at 11:15AM Mar 27, 2024Observed: 12 ft at 11:30AM Mar 27, 2024Observed: 12.01 ft at 11:45AM Mar 27, 2024Observed: 12.05 ft at 12:00PM Mar 27, 2024Observed: 12.08 ft at 12:15PM Mar 27, 2024Observed: 12.06 ft at 12:30PM Mar 27, 2024Observed: 12.1 ft at 12:45PM Mar 27, 2024Observed: 12.13 ft at 1:00PM Mar 27, 2024Observed: 12.09 ft at 1:15PM Mar 27, 2024Observed: 12.08 ft at 1:30PM Mar 27, 2024Observed: 12.14 ft at 1:45PM Mar 27, 2024Observed: 12.15 ft at 2:00PM Mar 27, 2024Observed: 12.13 ft at 2:15PM Mar 27, 2024Observed: 12.13 ft at 2:30PM Mar 27, 2024Observed: 12.11 ft at 2:45PM Mar 27, 2024Observed: 12.15 ft at 3:00PM Mar 27, 2024Observed: 12.17 ft at 3:15PM Mar 27, 2024Observed: 12.15 ft at 3:30PM Mar 27, 2024Observed: 12.15 ft at 3:45PM Mar 27, 2024Observed: 12.22 ft at 4:00PM Mar 27, 2024Observed: 12.15 ft at 4:15PM Mar 27, 2024Observed: 12.2 ft at 4:30PM Mar 27, 2024Observed: 12.16 ft at 4:45PM Mar 27, 2024Observed: 12.17 ft at 5:00PM Mar 27, 2024Observed: 12.15 ft at 5:15PM Mar 27, 2024Observed: 12.17 ft at 5:30PM Mar 27, 2024Observed: 12.2 ft at 5:45PM Mar 27, 2024Observed: 12.21 ft at 6:00PM Mar 27, 2024Observed: 12.16 ft at 6:15PM Mar 27, 2024Observed: 12.21 ft at 6:30PM Mar 27, 2024Observed: 12.15 ft at 6:45PM Mar 27, 2024Observed: 12.2 ft at 7:00PM Mar 27, 2024Observed: 12.17 ft at 7:15PM Mar 27, 2024Observed: 12.17 ft at 7:30PM Mar 27, 2024Observed: 12.16 ft at 7:45PM Mar 27, 2024Observed: 12.16 ft at 8:00PM Mar 27, 2024Observed: 12.18 ft at 8:15PM Mar 27, 2024Observed: 12.19 ft at 8:30PM Mar 27, 2024Observed: 12.21 ft at 8:45PM Mar 27, 2024Observed: 12.24 ft at 9:00PM Mar 27, 2024Observed: 12.2 ft at 9:15PM Mar 27, 2024Observed: 12.24 ft at 9:30PM Mar 27, 2024Observed: 12.22 ft at 9:45PM Mar 27, 2024Observed: 12.27 ft at 10:00PM Mar 27, 2024Observed: 12.25 ft at 10:15PM Mar 27, 2024Observed: 12.31 ft at 10:30PM Mar 27, 2024Observed: 12.31 ft at 10:45PM Mar 27, 2024Observed: 12.3 ft at 11:00PM Mar 27, 2024Observed: 12.31 ft at 11:30PM Mar 27, 2024Observed: 12.33 ft at 11:45PM Mar 27, 2024Observed: 12.38 ft at 12:00AM Mar 28, 2024Observed: 12.4 ft at 12:15AM Mar 28, 2024Observed: 12.36 ft at 12:30AM Mar 28, 2024Observed: 12.41 ft at 12:45AM Mar 28, 2024Observed: 12.36 ft at 1:00AM Mar 28, 2024Observed: 12.38 ft at 1:15AM Mar 28, 2024Observed: 12.43 ft at 1:30AM Mar 28, 2024Observed: 12.43 ft at 1:45AM Mar 28, 2024Observed: 12.43 ft at 2:00AM Mar 28, 2024Observed: 12.44 ft at 2:15AM Mar 28, 2024Observed: 12.45 ft at 2:30AM Mar 28, 2024Observed: 12.45 ft at 2:45AM Mar 28, 2024Observed: 12.42 ft at 3:00AM Mar 28, 2024Observed: 12.4 ft at 3:15AM Mar 28, 2024Observed: 12.41 ft at 3:30AM Mar 28, 2024Observed: 12.45 ft at 3:45AM Mar 28, 2024Observed: 12.41 ft at 4:00AM Mar 28, 2024Observed: 12.44 ft at 4:15AM Mar 28, 2024Observed: 12.45 ft at 4:30AM Mar 28, 2024Observed: 12.42 ft at 4:45AM Mar 28, 2024Observed: 12.42 ft at 5:00AM Mar 28, 2024Observed: 12.4 ft at 5:15AM Mar 28, 2024Observed: 12.45 ft at 5:30AM Mar 28, 2024Observed: 12.42 ft at 5:45AM Mar 28, 2024Observed: 12.4 ft at 6:00AM Mar 28, 2024Observed: 12.4 ft at 6:15AM Mar 28, 2024Observed: 12.41 ft at 6:30AM Mar 28, 2024Observed: 12.41 ft at 6:45AM Mar 28, 2024Observed: 12.41 ft at 7:00AM Mar 28, 2024Observed: 12.46 ft at 7:15AM Mar 28, 2024Observed: 12.47 ft at 7:30AM Mar 28, 2024Observed: 12.48 ft at 7:45AM Mar 28, 2024Observed: 12.44 ft at 8:00AM Mar 28, 2024Observed: 12.48 ft at 8:15AM Mar 28, 2024Observed: 12.51 ft at 8:30AM Mar 28, 2024Observed: 12.47 ft at 8:45AM Mar 28, 2024Observed: 12.51 ft at 9:00AM Mar 28, 2024Observed: 12.49 ft at 9:15AM Mar 28, 2024Observed: 12.48 ft at 9:30AM Mar 28, 2024Observed: 12.49 ft at 9:45AM Mar 28, 2024Observed: 12.49 ft at 10:00AM Mar 28, 2024Highest Observation: 12.56 ft at 10:15AM Mar 28, 2024Observed: 12.5 ft at 10:30AM Mar 28, 2024FREP1(plotting HPIRG) Graph Created (11:03AM Mar 28, 2024)ObservedLatest observed value: 12.5 ft at 10:30 AM EDT 28-Mar-2024. Flood Stage is 23 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: The above river forecast includes future rainfall. Forecast stages may be different if the rainfall does not occur.

NOTE: Stage may be affected by ice.

NOTE: Forecasts for the Allegheny River at Freeport Lock and Dam are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Clinton Lock and Dam Upstream Gauge Downstream Gauge Downstream Gauge - at Natrona Lock and Dam
Flood Categories (in feet)
Major Flood Stage: 26
Moderate Flood Stage: 24
Flood Stage: 23
Action Stage: 16
Low Stage (in feet): -9999

Historic Crests
(1) 33.30 ft on 03/18/1936
(2) 25.70 ft on 12/30/1942
(3) 25.30 ft on 03/10/1964
(4) 25.00 ft on 01/20/1996
(5) 24.80 ft on 01/22/1959
(6) 24.50 ft on 06/23/1972
(7) 24.10 ft on 09/18/2004
(8) 23.60 ft on 03/16/2007
(9) 23.30 ft on 03/05/1964
(10) 22.70 ft on 02/14/1966
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 19.54 ft on 01/29/2024
(2) 22.58 ft on 02/19/2022
(3) 18.50 ft on 03/23/2007
(4) 23.60 ft on 03/16/2007
(5) 24.10 ft on 09/18/2004
(6) 25.00 ft on 01/20/1996
(7) 22.50 ft on 12/31/1990
(8) 22.20 ft on 06/21/1989
(9) 24.50 ft on 06/23/1972
(10) 22.70 ft on 02/14/1966
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 01/01/1980
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
33.29 Water reaches the record flood level of the ST. Patricks Day Flood and crest on March 18, 1936.
25 Some buildings in the industrial park 1/4 mile upstream from the Lock begin to flood.
24.1 Water reaches the level reached during Hurricane Ivan September 18, 2004. Freeport received 6 inches of rain.
22.8 Backwater from Buffalo Creek surrounds the sewage disposal plant on Lower Market Street. Basements on First, Second and Lower High and Market Streets in town begin to flood.
20.2 Lock walls overtopped.
16 Navigation suspended. Lock out of service.
About This Location Collapse

Latitude: 40.684722° N, Longitude: 79.667500° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 23 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 747.5 770.5 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 748 771 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
10 Day (HEFS) 10 Day (NAEFS) 10 Day (GEFS)
HEFS Ensemble NAEFS Ensemble GEFS Ensemble

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Pittsburgh Weather Forecast Office
192 Shafer Road
Moon Township, PA 15108
(412) 262-1591
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Page last modified: 2-Nov-2020 7:30 PM
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