Beginning this June, Seattle City Light will begin a 10-week underground cable injection project on Queen Anne that will increase reliability of electrical service and add 25 years of life to aging underground cables. City Light is working with a company called Novinium to inject the aging underground cables with silicone. The process fills cracks that have developed in the cable insulation that can lead to power failures. The project is planned to begin in mid-June and is estimated to last about 10 weeks. On a typical day, crews will work between 8:00 a.m. and 5:00 p.m., Monday through Friday. Cables determined to be beyond repair will have to be replaced and customers will be notified at least one week in advance of any planned outages which may be necessary to replace the cable.
The silicone injection process is a great alternative to digging up and replacing old cables because it will cost less and be less disruptive to the neighborhood while extending the life of the existing cables. The process has been successfully applied to projects in Leschi, View Ridge, Laurelhurst and Arroyo Beach. When we can employ methods that enhance reliability, cost less and minimize disruption to customers, it is a step in the right direction.