'Major Realignment' SH7 Underway - West of Hanmer Springs Turnoff

Source: NZ Transport Agency (NZTA)
Date: 22/11/2019

Sylvia Flats, SH7, west of Hanmer turnoff, realignment away from river to protect highway

Waka Kotahi NZ Transport Agency has begun a major realignment of 700 metres of highway on SH7, west of the Hanmer Springs turnoff. Establishment work on site started this week with earthworks from next week.

“The realignment is needed as the Lewis River is cutting into the highway at Sylvia Flats, near the Boyle River, and eventually will undermine it, threatening the route,” says Colin MacKay, Portfolio Manager for the Transport Agency. “We need to realign this road to ensure it is safely away from the river and ensure this key state highway linking the east and west coasts and Nelson/Marlborough remains resilient and reliable for the future.”

The work will continue throughout summer until May 2020. Road users will have to slow down near the work site while crews, trucks and machinery are on the highway, Monday to Saturday inclusive, 7 am to 7 pm.

The overall cost of the project is around $3 million. The Transport Agency has been working closely with the Department of Conservation since this project was proposed as the area is part of the public conservation lands and resource consents have been required for all construction activities.

The area of road being realigned is three kilometres past the Boyle River, on the west side of the Hanmer Springs turnoff and Island Hills.

State Highway 7 is a key freight and tourist route between the West Coast and Canterbury, Nelson/ Tasman and Canterbury and Picton and Christchurch. It runs through the Lewis Pass National Reserve and public conservation lands. In the event of SH1 via Kaikōura being closed, the Lewis Pass is the only road link between Picton and the rest of the South Island.