Citation Codes Equivalent Citations citation codes Docket Number No. 89-1508. See more information ... Smart Summary Please sign up to generate summary. COLORADO INTERSTATE GAS CO. v. NATURAL GAS PIPE LINE COMPANY OF AMERICA ET AL. C.A. 10th Cir. Motion of Public Citizen for leave to file a brief as amicus curiae granted. Certiorari denied. Reported below: 885 F. 2d 683.