Holden Mine Water Treatment Plant Operations

Project Summary

Upon the successful completion of a new water treatment facility, IMCO was given the opportunity to manage and operate the new facility. The Holden water treatment plant is producing clean, treated water from the mine, surface runoff, and groundwater. 

The water treatment plant is continuously being improved upon with small projects also performed by the IMCO Holden team. IMCO's team is currently operating the plant 24 hours a day for Rio Tinto on a multi-year contract. 

In April 2015, IMCO started work on the construction of a new water treatment facility at the site of an abandoned copper mine in remote North Central Washington, near Lake Chelan. All equipment and materials were barged from the City of Chelan, up the lake, to this very remote site.



Holden Mine, WA (near Holden Village)


Rio Tinto

Contract Amount



Ongoing since 2016