Boise's main and side altars, originally diverted to Salt Lake City, in 1917 were shipped to the diocese of Lake Charles, LA, where they are currently serving at the Cathedral of the Immaculate Conception! Here's a picture that shows the high altar:
This picture gives a better appreciation for the size of the high altar. Taken during a Pontifical High Mass in the usus antiquior, celebrated by Bishop Provost, Dec 26, 2010. (Beaumont Enterprise, link)
So, "wbbruchhaus", a sincere thank you for providing the links!