P.O. Box 500
1492 Wind River Hwy
Carson, Washington 98610
Pay by Phone: 877-885-7968
Underwood Substation Construction
Underwood substation construction is now complete! The work began in July 2015 and finished in March 2016. The completion of this project marks a significant upgrade in quality and reliability of service for the Underwood, Mill A and Willard areas. Read the latest Manager’s Message for more information.