McMahon & Mann Consulting Engineering and Geology, P.C.

Todd Swackhamer, P.E. and Jon Whiting, EIT Present: Using Soil-Cement Mixing for Soft Ground Improvement at a Landfill

January 17th, 2018 9:57am
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MMCE employees, Todd Swackhamer and Jon Whiting presented at the Annual Joint ASCE/BAPG Meeting. Their presentation is based on an MMCE project at Seneca Meadows Landfill in Central New York. The Seneca Meadows Landfill is the largest municipal solid waste landfill in the state. It is situated in extremely challenging soil conditions that have caused a history of stability problems at the facility. Following two major slope failures during construction in the early 2000’s the facility decided to try a different approach to develop stable landfill cells. Todd discussed the site history and geologic setting of the facility, and how MMCE assembled a massive amount of data into a model to characterize the subsurface conditions. He described how the model was used to design a ground improvement program to allow for the berms and excavations to be constructed while meeting the required factors of safety. Jon concluded the discussion talking about the construction methods, assessment techniques, and lessons learned from the last few years.

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