Hours Of Operations Matheson Tri-Gas Oregon Portland Matheson Tri-Gas Hours of Operation and Locations in Portland, OR 4.8 - 149 votes 1 Locations in Portland www.mathesongas.com Matheson Tri-Gas Hours Category: Home & Garden Matheson Tri-Gas - Portland, OR 97210 3030 Nw 29th Ave(800) 426-0689 View Store Details Explore PortlandView More Apparel CostcoMarshallsTJ MaxxRoss Dress for LessDd's DISCOUNTS Sports CostcoTargetSports AuthoritySheplersNew Balance Jewelry CostcoMarshallsBurlington Coat FactoryCatoDeb Shops Recommend For You Nebraska Public Power District Northwest Natural Gas Company NorthWestern Energy NSTAR Orlando Utilities Commission Otter Tail Power Company Peoples Gas Pepco Runnings Farm & Fleet Tucson Electric Power