June 1906: West Opera House architectural plans reviewed by Chicago-based stage engineers and revised.
January 1907: Architectural plans by Rapp Bros. of Trinidad made public. I. H. and William Rapp were assisted by Arthur Hendrickson.
February 1907: Ed West hires John A. McLaughlin of Trinidad as general contractor on construction of the theater. McLaughlin was assisted by William Rupp and John McEwan, both of Trinidad.
February 15, 1907: groundbreaking ceremony at 421 W. Main St., Trinidad. Charles M. Campbell hired as construction superintendent.
October 1907: Electrical wiring completed by Boynton Company of Colorado Springs.
March 11, 1908: Scenery, curtains, and stage lighting installed by F. R. Megan and the Kansas City Scenic Company.
March 17, 1908: West Theater opened to the public.
May 20, 1908: ballroom opened.
November 1909: new drop curtain installed, depicting the Rio Grande River in Texas. Produced and installed by Charles F. Thompson Co. of Los Angeles.
January 1916: former storefront converted to office space.
October 1917: improvements to stage lighting.