Probably anyone with a current fishing license, and who is not wanted by the authorities can use the pier. On May 20th 2019 I'm editing this answer. There is currently no water underneath the pier. I was at the park a few days ago and they had to drain about two-thirds of the lake in order to fix the dam, so there is no one going to be fishing right now. I have no idea how long it will take to fix the dam and for the one major stream that flows into the lake to fill it back up.
Yes, is free to use.
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