The ruling effectively requires Go Transit to use quieter equipment less often. However, the equipment is less efficient and more expensive.
GO Transit Spokesperson Vanessa Thomas said, “The CTA has ordered GO to use a vibratory hammer from France and a Giken press-in machine, one of only two in the world. We brought that from overseas. It’s important to remember, these are slow technology… the Giken installs two piles a day while the vibratory hammer installs three to four. By comparison, the impact hammer or pile-driver installs six to eight”.
Thomas said, “The decision will significantly increase the cost of the project and extend the construction duration”. According to the original construction plan, piling was due to be completed by December 2009 but as a direct result of the noise mitigation measures, piling activity extended to late 2010. The entire project will now not complete until December 2014, over three years later than originally planned.