A full-time security guard had been on site to prevent people walking across the rail bridge.
Mr Holford said the $1.3 million project involved replacing the rusting and rotting old structure, including timber decking, beams and struts as well as the steel supports.
The ramps at each end of the bridge had been reconstructed and the handrails were being replaced with slightly higher ones to meet the Building Act requirements, he said.
"The bridge is an important access route for pedestrians and cyclists between Matapihi and the city centre with up to 200 people using the pathway on the bridge every day."
Council had provided a free temporary shuttle bus service six days a week from Matapihi to Bayfair.
Mr Holford said the project was expected to come in within the final agreed budget.