Project Summary

This phase of the Oso mud slide clean-up and rehabilitation included a $6.4 Million contract working for Snohomish County.

The contract involved sorting, screening, redistributing, grading, and removing slide debris, erosion and water pollution control, site stabilization, removal of contaminated soils, municipal solid waste, hazardous waste, scrap metal, downed trees and other work for Snohomish County. 

IMCO's team removed the debris from Highway 530 working for WSDOT, and an IMCO crew was onsite working on the recovery effort the week after the catastrophic landslide. IMCO crews finished the WSDOT work early and now has finished the Snohomish County project ten days ahead of schedule.  



Darrington, WA


Snohomish County

Contract Amount

$6.4 Million


Snohomish County


June 2014 - September 2014

Project Highlights

IMCO crews processed and hauled over 200,000 cubic yards of material from the slide area off of SR 530. About 90% of the debris was earthen material. IMCO personnel was commended for carefully recovering over 1,000 personal items and reconnecting them with loved ones. Crews worked long days through the summer months to take advantage of the favorable weather conditions and kept a steady, well planned out, trucking schedule that kept debris moving from the site.