I should have posted an update sooner. A Texas Parks & Wildlife Game Warden called me at 9:30 PM that same night! I am glad to report also, that she was not too happy about the intentions of whomever strung the chain. She was very concerned about the duck hunters in the morning and was going to be out there before first light. See why I think the world of our Texas Game Wardens?
As far as removing the chain, it was hammered in place with large nails and I was a long ways away from the tool box in my truck.