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Streamflow Measurements for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 03073751 Monongahela R @ Maxwell L&D (lower pool) @ Maxwell
Fayette County, Pennsylvania
Hydrologic Unit Code 05020005
Latitude  39°59'50.68", Longitude  79°57'32.19" NAD83
Drainage area 4,440  square miles
Gage datum 734.08 feet above NAVD88
Output formats
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
72012-09-13 11:28:34EDTYesJLM/FPCUSGS8199.950.080.30Fair NONE1MaxwellMBOTQADCPVADCP819873109000.08SOFTsiltUNEVunknUNEVNSTDDNST100.00
62012-07-17 13:49EDTYesJLMUSGS35809.850.00 GoodClearNONE1MaxwellMBOTQADCPVADCP3580852107000.33SOFTsiltUNEVunknUNEVNSTDATGA
52012-03-22 15:30EDTYesFC/JLMUSGS1360011.01 GoodClearNONE11BRDSQADCPVADCP13600633101001.34SOFTsiltEVENunknUNEVSTNDDNST2000.00
42011-07-13 09:30:30EDTYesJLM/RCUSGS19209.78 0.50FairClearNONE1Imported Channel 1BRDSQADCPVADCP192063194700.20UNSPsiltUNSPunknUNSPUNSPDNST8000.00
32011-04-29 09:46EDTYesJLM/FCUSGS3620015.87 GoodUnspecifedNONE1Imported Channel 1BRDSQADCPVADCP36200681121003.01UNSPUNSPUNSPunknUNSPUNSPUNSP
22011-03-31 12:08:30EDTYesJF/BHUSGS771010.36 0.50FairUnspecifedNONE1Imported Channel 1MBOTQADCPVADCP771052968001.13UNSPUNSPUNSPunknUNSPUNSPUNSP
12011-03-01 12:08ESTYesJLM/LJFUSGS5380019.670.070.90GoodClearNONE1Imported Channel 1BRDSQADCPVADCP53800677143003.77UNSPUNSPUNSPunknUNSPUNSPUNSP