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Continue to ChatSoutheast coordinates of Heyburn Reservoir Map - OK, United States https://www.yellowmaps.com/usgs/places.cfm?latdec=35.875&londec=-96.25&fname=Southeast%20coordinates%20of%20Heyburn%20Reservoir&fclass=Topo%20Map&st=OK&county=United%20States&el=---&quad=Heyburn%20Reservoir&quadid=35096h3