"Built by Casavant and designed and voiced by Lawrence I. Phelps, the organ is one of the first modern mechanical-action (tracker) organs built at an American university, and is considered a landmark instrument in the “Organ Revival” movement. Constructed in a style emulating 17th- and 18th-century German organ-building principles... The organ includes 2,079 pipes, a 56-note keyboard, a 32-note pedal board, and 34 stops. The... organ’s façade fills the entire south wall of the hall, with the tallest pipes reaching 19 feet." (from https://smtd.colostate.edu/facility/organ-recital-hall/)

https://music.colostate.edu/organ/
https://source.colostate.edu/csus-pipe-organ-half-century-amazing-music/
https://smtd.colostate.edu/facility/organ-recital-hall/