This project involved the extension of the existing historical culvert while working around live traffic and preserving a historical arch. One of the biggest challenges to this was carrying out work with heavy plant, while maintaining a live road as this was the only heavy haulage route in and out of Lyttleton.

 

A night closure of the road was required to tie the new retaining wall to the previously upgraded structures on site. Full time fluming of the existing creek was required for the full course of the works, while also complying with Ecan requirements.