The maintenance will include deck running board replacements, structural strengthening and checking and tightening of bolted deck connections.
The work may also require abseilers working below the bridge surface over the Clutha River/Mata-Au.
Doing the maintenance in the summer months allowed the team extra daylight hours in which to work, while night-time closures minimised the impact on road users, the NZTA said in a statement.
Motorists would need to take detours or plan their travel outside the hours of the closures.
Detours are as follows:
■ Light vehicles can travel via Kane and Camp Hill Roads through Hāwea Flat. It will add 25-30 minutes to the journey. (Camp Hill Road Bridge on the detour route isn’t approved for HPMV or 50MAX).
■ HPMV 50MAX and HPMV Higher Mass permit holders can travel via Kane, Cemetery, Domain Roads and Capell Ave — State Highway 6 via Albert Town to State Highway 84.
■ Overweight permit holders need to refer to their permit and confirm an alternate route according to their permit type or travel outside of the closure times.
