Below from Cinema Tour

Groundbreaking for the Plaza, the first theater in Kearns, was on Saturday, 11 January 1964. The theater had 950 seats and was built with three projection rooms "so that it will be possible to show Cinerama if the demand demonstrates that such an operation would be profitable."

The Plaza may never have shown Cinerama, but it was the only theater in Utah that was built for the 3-projector Cinerama process. The Villa Theatre was modified for Cinerama about 12 years after it opened and the Century 21, which was to have a curved screen for Cinerama, would have been built for the single-projector Cinerama process.

In 1977, the Plaza Theater closed for several weeks as the original auditorium was split in two. On 24 August 1977, the theater reopened as the Valley Twin Cinema.  The larger auditorium had 500 seats and the center projection booth. The smaller auditorium had 290 seats and used the right Cinerama projection booth. Like the Plaza, the Valley Twin showed second-run films.

07/02/64