Complex sentence: Construction of the 8 kilometre (5 mile) line began in 2009 and will open March 2013, instead of December 10,2012, because of utility work delays for the Bow Trail and 17th Avenue SW corridors.
Split into simpler sentences: Construction of the 8 kilometre (5 mile) line began in 2009. It will open in March 2013, instead of December 10,2012, because of utility work delays for the Bow Trail and 17th Avenue SW corridors.