With construction delays, first gas exports are expected one year later than the targeted date in 2024.
Facility will employ 70 people when construction is completed in the first quarter of 2017.
Company says deal will bolster its plans to ship liquefied natural gas from a proposed terminal on the Oregon coast.
Seperate deals total more than $1 billion.
Calgary-based Veresen leads the $7 billion liquefied natural gas project.