Hours Of Operations Otter Tail Power Company South Dakota Milbank Otter Tail Power Company Hours of Operation and Locations in Milbank, SD 4.8 - 14 votes 1 Locations in Milbank www.otpco.com Otter Tail Power Company Hours Category: Home & Garden Otter Tail Power Company - Milbank, SD 57252 404 S 2nd St(605) 432-4579 View Store Details Explore MilbankView More Apparel ExpressDiesel Sports Vans 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