sentences:  The original pipeline was 20-22 inches in diameter, five hundred miles long, trenched by ditching machines but some portions dug by hand, linked by Dresser coupling rather than welded, and limited to 50 psi.The Bivins Compressor Station, using three Worthington Corporation compressors of 1000 HP each, was the first soon followed by Clayton and Devine and the introduction of electric welding.In 1938, CIG has 633 miles of pipeline and 145 employees.