A new manufacturer has floated into Warren County waters and started production of pontoon boat trailers. Benchmark Tool & Machine Trailer has located in Morrison at the old Tennessee Warehouse building and has made about 125 trailers thus far.The business is an expansion for Pelham-based Benchmark, which was founded 12 years ago by partners Robbie Dickerson and Jeff Hendrix. That plant has about 75 employees now.Seven people work at the new Morrison facility, including Kirk Mullican, who has moved his business, Vervilla Machine, to that location in a merger of sorts.