Updated 7:20 am CDT, Sunday, May 19, 2019 LOWELL, Vt. (AP) — Vermont’s largest utility will again offer free tours of a wind farm in the Northeast Kingdom this summer. Green Mountain Power says it’s a chance for residents and tourists to see a wind farm up close and learn about how wind energy works. Visitors will tour two of the 21 wind turbines at the Lowell Mountain site. The tour runs about 90 minutes and participants must register in advance. The tours are scheduled for June 12 and July 20 at 10 a.m. Participants can register on the GMP website .