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Potomac River at Wisconsin Avenue (01647600)

History of the USGS 01647600 Potomac River at Wisconsin Ave, Washington D.C.

There has been a USGS streamgage at Georgetown since 1935. The original structure was at the foot of Wisconsin Avenue, and is shown in the photos. The present streamgage was installed in 2009 during construction of the National Park Service’s Georgetown Waterfront Park, and was relocated a few hundred yards (meters) upstream from the former site. 

Gage house under construction in 1935 at the foot of Wisconsin Avenue (left photo). Photo is looking into Georgetown from the river bank.

Photo on right shows the 1935 gage house in 2008. 


The USGS gage was moved upstream from the Wisconsin Avenue location in 2009 during the construction of the Georgetown Waterfront Park.

Components are visible in the new streamgage. The instruments are solar powered.


U.S. Department of the Interior
U.S. Geological Survey

Wendy S. McPherson (

* If you want to receive notification of updates to the water conditions or receive the file, send an email to Wendy S. McPherson at wsmcpher@usgs with the following message: "Send monthly water conditions report."

Maryland-Delaware-D.C. Water Science Center
5522 Research Park Drive
Baltimore MD, 21228


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Page Last Modified: Thursday, March 08, 2018