sentences:  Corporate headquarters were in Colorado Springs and the company introduced a group life insurance program and a death benefit plan in the early 1930s, followed by a retirement income plan in 1939, a medical plan in 1940, and a credit union The Cimarron Station came on line in 1941, followed by the Apishipa Station in 1943.The McClintock Station was operational in 1944 followed by the East Denver and Lakin Stations in 1947, the latter connecting Denver to the Hugoton Gas Field.The company was using shortwave radio communication and airplane pipeline patrols by 1948.