Terowie, South Australia, was an important railway stop due to changing rail gauges and it is possibly most famous (locally) for being the short rest stop for General Douglas MacArthur on his way across Australia. It is in Terowie that he first said "I shall return", when speaking of the Phillipines.
The SA jetties that I have visited on the Yorke Peninsula that are in Spencers Gulf are:
-Point Turton
-Port Victoria
-Port Hughes
-Moonta Bay
-Wallaroo
-Port Broughton
There is at least one more jetty on that side that I have not visited.