GUARANTY AGREEMENT Dated as of September 30, 2014 of MIDCOAST OPERATING, L.P., ENBRIDGE G & P (EAST TEXAS) L.P., ENBRIDGE PIPELINES (EAST TEXAS) L.P., ENBRIDGE G & P (OKLAHOMA) L.P., ENBRIDGE PIPELINES (NORTH TEXAS) L.P., ENBRIDGE G & P (NORTH TEXAS)...