No. 77-1061. Argued and Submitted May 12, 1978. Decided November 2, 1978. Andrew F. Tranovich, N.L.R.B., Washington, D.C. (John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, and John D. Burgoyne, Atty., N.L.R.B., Washington, D.C., on the brief), for petitioner. Henry C. Cleveland, III, of Saunders, Snyder, Ross Dickson, P. C., Denver, Colo., for respondent. Petition from the National Labor