Complex sentence: The outer loop was replaced by a newer station in 2009 and reopened to replace its successor in 2013 when Hurricane Sandy flooded the new station in 2012, the newer station reopened in June 2017, once again closing the old loop.
Split into simpler sentences: The outer loop was replaced by a newer station in 2009 and reopened to replace its successor in 2013 when Hurricane Sandy flooded the new station in 2012. The newer station reopened in June 2017, once again closing the old loop.