Hours Of Operations Otter Tail Power Company South Dakota Big Stone City Otter Tail Power Company Hours of Operation and Locations in Big Stone City, SD 4.8 - 14 votes 1 Locations in Big Stone City www.otpco.com Otter Tail Power Company Hours Category: Home & Garden Otter Tail Power Company - Big Stone City, SD 57216 48450 144th St(605) 862-6300 View Store Details Explore Big Stone CityView More Apparel Rainbow Recommend For You Peoples Gas Pepco Runnings Farm & Fleet Tucson Electric Power United Power Urgent Care of Connecticut Aero Energy Bellagio Salon Blind Barber Dairyland Power Cooperative