Natural Gas Pipeline Home > Projects > Natural Gas Pipeline Natural Gas Pipeline 230-mile, 36-inch diameter pipeline crossing the Cascade Mountain Range. Location: OregonMiles: 230 mile natural gas pipeline36 inchThree (3) M&R stationsCompletion Year: 2019 Challenges Cross Cascade Mountain Range Complex HDD Crossing of Coos Bay FERC 7c Certificate Related Projects Compressor Station Transmission Pipeline System Replacement Transmission Modernization & Maintenance Alliance Program