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Potomac Geophysical Society Meeting
March 19, 2015

Geophysical Investigations in Support of the DC Clean Rivers Project

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.