TOWN OF SYLVESTER - The owner of Rock County's largest dairy farm hopes to build a mirror image of the 5,000-cow Rock Prairie Dairy next year in the town of Sylvester, west of Brodhead in Green County. Todd Tuls and his son, T.J., are working to sign agreements with neighbors of the proposed site to apply manure and hope to submit a permit to the Wisconsin Department of Natural Resources soon, Todd Tuls said. He's hoping to have all permits approved for a spring groundbreaking with milking starting by the end of 2016.