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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Monongahela River at Maxwell L&D Observed crest: 9.8 ft at 7:00am Nov 21 Observed: 9.8 ft at 7:00am Nov 21 Observed: 9.8 ft at 5:00pm Nov 21 Observed: 9.8 ft at 6:00pm Nov 21 Observed: 9.8 ft at 7:00pm Nov 21 Observed: 9.8 ft at 8:00pm Nov 21 Observed: 9.8 ft at 9:00pm Nov 21 Observed: 9.7 ft at 10:00pm Nov 21 Observed: 9.7 ft at 11:00pm Nov 21 Observed: 9.7 ft at 12:00am Nov 22 Observed: 9.8 ft at 7:00am Nov 22 Observed: 9.7 ft at 5:00pm Nov 22 Observed: 9.8 ft at 6:00pm Nov 22 Observed: 9.8 ft at 7:00pm Nov 22 Observed: 9.8 ft at 8:00pm Nov 22 Observed: 9.8 ft at 9:00pm Nov 22 Observed: 9.7 ft at 10:00pm Nov 22 Observed: 9.8 ft at 11:00pm Nov 22 Observed: 9.8 ft at 12:00am Nov 23 Observed: 9.7 ft at 7:00am Nov 23 Observed: 9.7 ft at 5:00pm Nov 23 Observed: 9.7 ft at 6:00pm Nov 23 Observed: 9.7 ft at 7:00pm Nov 23 Graph Created (12:33am Nov 24, 2009) Observed MAXP1 (plotting HTIRZ) Gage 0 Datum: 734.50 Latest observed value: 9.7 ft at 7:00 PM EST 23-Nov-2009. Flood Stage is 32.0 ft. Tailwater (ft) Flow (kcfs)
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NOTE: The above river forecast includes future rainfall. Forecast stages may be different if the rainfall does not occur.

NOTE: Forecasts for the Monongahela River at Maxwell L&D are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Grays Landing L&D Upstream Gauge Downstream Gauge Downstream Gauge - at Charleroi L&D

Flood Categories (in feet)
Major Flood Stage:36
Moderate Flood Stage:34
Flood Stage:32
Action Stage:23.5

Historical Crests
(1) 44.40 ft on 11/05/1985
(2) 38.20 ft on 03/07/1967
(3) 38.00 ft on 03/05/1963
(4) 37.80 ft on 01/20/1996
(5) 36.50 ft on 02/19/2000
(6) 35.40 ft on 03/20/1963
(7) 32.60 ft on 06/24/1972
(8) 32.50 ft on 05/25/1968
(9) 32.30 ft on 02/10/1994
(10) 31.40 ft on 11/20/2003

Low Water Records
(1) 0.0 ft on 01/01/1980

 Monongahela River at Maxwell L&D location map

Flood Impacts Collapse
35.0 Homes flood on Middle Street, Liberty Street, Water Street, Broadway Street, River Street, and Axton Street in West Brownsville.
33.5 Lock walls overtopped.
32.0 LOW LYING AREAS OF WEST BROWNSVILLE BEGIN TO FLOOD.
31.0 Navigation suspended, lock out of service.
28.0 Middle Street and Liberty Street are cosed due to storm drain system backups...and several homes have basement flooding.
27.0 Brownsville Road at Albany Tunnel (near Assad Iron and Metal) in Fayette County is closed due to high water.

About This Location Collapse
Latitude: 40.000800° N, Longitude: 79.960500° W, Horizontal Datum: NAD83

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 32 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 N/A N/A Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 734.5 ft 766.5 ft Older USGS topographic maps, NGVD29 benchmarks
MSL N/A N/A Older USGS topographic maps, MSL benchmarks
Other N/A N/A  

Other Data Sources:
Corps of Engineers (COE) Info for Maxwell L&D

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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.

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192 Shafer Road
Moon Township, PA 15108
(412) 262-1591
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