Olinda Pines

Just wondering if anyone knows if the Olinda pines trails are properly sanctioned trails and if they are who maintains them as I have noticed that some of the features there have recently been torn down.
 
Just went there recently and most of the jumps where destroyed to the point where they are now unrideable, as well as some berms have support logs ripped away from them. Pretty much nowhere to ride in the Yarra Valley anymore.
 
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