Hours Of Operations Otter Tail Power Company North Dakota Cooperstown Otter Tail Power Company Hours of Operation and Locations in Cooperstown, ND 4.8 - 14 votes 1 Locations in Cooperstown www.otpco.com Otter Tail Power Company Hours Category: Home & Garden Otter Tail Power Company - Cooperstown, ND 58425 602 Roberts Ave Nw(701) 797-2441 View Store Details Explore CooperstownView More Apparel DotsAvenue 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