I visited Trestle Bridge yesterday when I noticed that your coin was still listed there.
Bad news your coin is not in the cache.
There was a cacher who signed the log on June 14th with the name "Jeremy" and said in his log that he "took coin". Perhaps this mystery person is who has your geocoin and since he hasn't logged his find I hope that he reads this message and sees that the coin is not keeper but a trackable item with a mission.
I hope the coin shows up sometime.