George, the short hole at the Valley Club is used as an extra hole only to create an "inside nine." There is a road that bisects the course, between the 2nd green and 3rd tee and the 12th green and 13th tee.
The extra hole is played from beside the 18th tee, to a small flat green about 120 yds away.
The "inside nine" is #1, 2, 13, 14, 15, 16, 17, extra hole, and 18th played from the short tee. I think it's mostly used by couples late on weekend afternoons. The extra hole isn't used for tiebreakers, etc, because it's 400 yds away from the finishing hole.