trivia - how many different kinds of sleepers in one location?

[Arthur Marsh <marsh@ties.itu.ch>]

At Blackwood station there are three varieties of sleepers on parallel
tracks, concrete sleepers for the SG Adelaide - Melbourne line, steel
sleepers for the BG Adelaide - Belair line and wooden sleepers for the
BG crossing loop.

Any other nominations for the greatest variety of sleepers (materials,
gauge [convertible], single or multiple gauge) in one location?

Arthur.