The Washington State Department of Labor & Industries (L&I) is investigating what led to a worker being killed when a trench collapsed near 38th and Lincoln in Renton on Wednesday.
Fire crews said dry soil was more susceptible to sloughing off and caving in. Though there was a trench box on site, not all areas were protected.
L&I said its investigation will take time.
"We look at a number of different things, from the type of soil they were working in, what protections they had in place, whether those were up to the requirements that we have for trenching worksites, and all of that type of thing. So, it can take some time to get those done, anywhere from a few months to six months," public affairs manager Matt Ross said. "Especially in a fatality inspection where a worker death is involved, we really want to make sure we take our time and are getting that right."
It comes around two months after two workers were killed in a trench collapse at a Shoreline home while fixing a fractured sewer line when a topside dirt pile caved in.
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