Coronet Peak Chairlift

Coronet Peak Chairlift - Concrete Supply - Allied Concrete

Project: Coronet Peak Chairlift Development Project

Location: Wakatipu Basin

Client: Cook Brothers / NZ Ski

Product: 1500+m3 of 30MPa 6% air entrained concrete

Allied Concrete Queenstown were the preferred concrete supplier for the construction of a new high speed six-seater chairlift at Coronet Peak Ski Field.

Construction of the lift took place during the 2018/19 offseason, with over 1500m3 of 30MPa 6% air entrained concrete supplied to manage the freeze-thaw conditions for the lower and upper station buildings and 14 pylon foundations.

The geographic location not only presented challenges surrounding weather conditions for concrete pours, but also logistical challenges with vehicle travel times of up to an hour to the main ski field base building at 1200m above sea level, then another 20min climb up a steep access road, a testament to our modern vehicle fleet.

Limited access to various pylon sites on the mountain required concrete to be delivered via helicopter on several occasions. Concrete was discharged into buckets, which were then connected to a helicopter and transported to each site. Allied staff worked with NZ Ski and Cook Brothers Construction to conduct each pour in an efficient and safe manner.

Coronet Peak - Allied Concrete

200+m3 was required at the top of the mountain, with initial ideas of line pumping 450 linear metres with a 160m vertical elevation gain. Allied Concrete Queenstown Branch Manager, Shane Tell, collaborated with construction teams to develop an alternative delivery methodology which included the use of 40tonne dump trucks to transport concrete in heavily secured skips to pour sites. Mixes were designed to handle the 1.6km trip, and the resulting outcome was successful supply and significant savings for the client with reduced helicopter time.

The new lift replaces the existing Coronet Express chairlift, with the project completed in time for the upcoming 2019 ski season.