SH5 Tumunui Realignment, Rotorua, North Island
May 31, 1998
Accelerated road construction due to moisture sensitive materials
This 2km Transit New Zealand/Rotorua District Council project, contracted for $3.1M, started in May 1997 and completed in April 1998, 6 months early.
Work involved constructing a 425,000m3 engineered fill comprising 40% moisture sensitive ash, of which careful management was required to complete the earthworks successfully.
The location and extent of moisture sensitive material (Taupo ash) was identified early, and effort was initially concentrated on completing the earthworks involving this material during the relatively dry summer months.
Structures constructed included a 4.8m dia multiplate culvert, two x 2.8m diameter Helcor stock underpasses and two large precast underpasses.