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Walsh constructed a shoofly — a short , temporary railroad track that allowed trains to circumvent the construction site .
Traditionally , sheet piles are used to stabilize a trench during construction . In this instance , however , Walsh proposed to UPRR an alternative solution that used deep soil mixing ( DSM ) to simultaneously serve as the foundation for the shoofly and the track shoring . In an unprecedented decision , UPRR approved this method as it not only eliminated the need for sheet piling , it eliminated
“ It starts with bringing on people that you know have the right attitude toward safety . We put that first in about everything we do .”
– Jeff Jones , Walsh Construction senior project manager
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