Bechtel completed a massive expansion of the natural gas pipeline that runs from Idaho’s border with British Columbia to central California for Pacific Gas Transmission Company and its parent company, Pacific Gas and Electric Company.
The team laid 684 miles (1,100 kilometers) of 42-inch (107-centimeter)
diameterpipe and 110 miles (177 kilometers) of 36-inch (91-centimeter) diameter pipe from the U.S.-Canadian border south to Fresno County in California.
Existing facilities at 15 compressor stations and three meter stations were modified and expanded, and a new compressor station built. The route passed through heavily wooded forests, steep mountain slopes, upland rolling hills, low-lying delta areas, and many miles of volcanic rock.
From one end of the 800-mile (1,300-kilometer
) line to the other, project staff took extraordinary measures to protect the environment—from worker education and special technologies to revegetation programs and fishery-enhancement measures.
The pipeline expansion boosted capacity by nearly two-thirds, from 1.4 to 2.3 billion cubic feet (39.6 to 65.1 million cubic meters) per day. And preserving the environment proved perfectly compatible with progress. Commercial operation began on schedule in November 1993.