Peter, I believe all the tees that were build for the US Amateur are shown on this picture.
But, there are a few new ones built at the end of last year.
#3 has a new one that is further back and actually on property that is part of Oakmont East in this picture.
#8 supposedly has a new tee also. Not sure of others.
#2 has a new cross bunker that is about where the trees that
cast shadows over the fairway short of the green are located.
By the way the hole that is furthest to the right (east) is acutally
the first hole on Oakmont East, a public course owned by Oakmont.
Its main claim to fame is as a parking lot for the US Open.