Centennial (1978) 12/12 The Scream of Eagles

A magazine prepares to do a feature on the history of Centennial; the murder of Soren Sorenson is finally proved; Morgan Wendell and Paul Garrett face off in an election that may determine the future of Colorado's natural resources.

Centennial is a 12-episode American television miniseries, that aired on NBC, from October 1978 to February 1979. It was based on the novel of the same name by James A. Michener, and was produced by John Wilder. It follows the history of the area of the fictional town of Centennial, Colorado, from 1795 to the 1970s

The miniseries was one of the longest (26½ hours, including commercials) and most ambitious television projects ever attempted at the time. It had a budget of US$25 million, employed four directors and five cinematographers, and featured over 100 speaking parts spanning 26 hours of television viewing time.
https://en.wikipedia.org/wiki/Centennial_(miniseries)