The Mist Underground Natural Gas Storage Facility consists of underground natural gas storage reservoirs, compressor stations, gathering pipelines, operations and maintenance facilities, and a gas transmission pipeline. The permitted storage area is approximately 5,472 acres and has a permitted daily natural gas throughput of 635 million standard cubic feet.
Operating. The North Mist Expansion Project, approved by Council in April 2016 through Amendment 11, started construction in 2017. The Council approved the Final Order on Requests for Contested Case and Request for Amendment 12, and issued an amended site certificate, at its September 22, 2017 meeting. On May 1, 2018, the Department received an Amendment
Determination Request regarding a proposed change to upgrade
the communication and supervisory control and data acquisition (SCADA) system
by replacing the existing radio system with a fiber optic network. In accordance with OAR 345-027-0057, the
Department conducted an Amendment Determination Request
review and made a written determination that the proposed change would not
require a site certificate amendment.
Northwest Natural Gas Company|
|Applicant/Certificate holder contact: