Bluffdale outlines $76 million grade‑separation using box‑jacking method beneath active rail
Bluffdale officials presented a $76 million project to replace a deficient one‑lane underpass on 146 South with a multi‑lane underpass built by pushing precast boxes under active Union Pacific tracks, citing a $6.5 million property acquisition and more than $6 million in preliminary engineering to date.
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Bluffdale staff described a major grade‑separation on 146 South intended to replace a single‑lane, low‑clearance crossing that the presenter called “very much, deficient in many ways, and so it needed to be removed.” The city said the solution uses a box‑jacking approach (presenter referenced a European “Verona” method) that allows crews to install a temporary bridge and push concrete box segments under active freight tracks while trains continue to run.
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