PGS: DC Clean Rivers Project

The March 19, 2015 meeting of the Potomac Geophysical Society will be held at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Timothy J. King, P.G. AECOM Germantown, Maryland

The DC Clean Rivers Project is an ongoing program being implemented by DC Water to reduce combined sewer overflows into the Anacostia and Potomac Rivers and Rock Creek. The Project involves construction of a series of storage and conveyance tunnels and related infrastructure to capture and subsequently treat combined sewer water from heavy rainfalls to reduce impacts to the region’s waterways.

Mr. King’s presentation will discuss the application of geophysical investigation methods to the planning and design of tunnels, shafts and related infrastructure associated with the project. Investigations have included seismic surveys to assess subsurface stratigraphy and depth to bedrock, borehole geophysical logging to characterize bedrock discontinuities, multichannel analysis of surface waves (MASW) to delineate buried channels, vertical seismic profiling for seismic design, and side-scan sonar surveys to delineate underwater obstructions.

Biography

Timothy King is a Principal Geologist at AECOM (formerly Woodward-Clyde Consultants and URS Corporation) in Germantown, Maryland. He built and is the leader of the geophysical services team at URS/AECOM. His experience includes engineering geophysics, engineering geology, and hydrogeology applied to site investigations to evaluate subsurface conditions related to tunnels, mines, highways, bridges, dams, and other civil infrastructure. He has been responsible for technical and management aspects of investigations at hundreds of sites across the United States and has worked on projects in Africa, South America, Europe and New Zealand.

Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

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