Complex sentence: Transpower reached agreement with Transit in 2005 for the installation of cable supports beneath the bridge for 220 kV power cables as part of a major project to improve the security of electricity transmission to North Auckland and Northland.
Split into simpler sentences: Transpower reached agreement with Transit in 2005 for the installation of cable supports beneath the bridge. Power cables operating at 220 kV are to be installed under the bridge as part of a major project to improve the security of electricity transmission to North Auckland and Northland.