I think this one was located in the 1500 block of Church Street.
I couldn't find anything about the artist, but the bench is in the same front yard as the jelly fish sculpture in the next photo.
Probably the same artist did both.

When Hurricane Ike slammed into Galveston, Texas in 2008, the saltwater killed an estimated 40,000 trees.
Many of them were 100-year-old live oaks, planted after the great hurricane of 1900.
A number of sculptors took a unique approach to helping the Island (and all of us devastated by Ike) restore damaged spirits.
They create beauty out of dead trees.