Wairakei East Wetland (Pond G) Construction

MAP Projects was engaged by Tauranga City Council to undertake the construction of stormwater swales and a wetlands area comprising of around 250,00m3 of earthworks and over two kilometres of access track. Culverts in four different locations were installed with a portion of the work, both earthworks and structures, undertaken below the water table.

This is a large scale project that has run smoothly in consultation with the client and its representatives and where any design issues once encountered have been dealt with in a spirit of mutual cooperation with a view of delivering the best solution within the available budget

The earthworks comprised of roughly 250,000m3 of sand and topsoil handled and reshaped with 10,000 m3 of fill area. There was no re-work of any material required and the utilisation of GPS technology helped ensure that there was no double handling of material and what was done was done to the design tolerances.

Two large box culverts up to 3.5 x 1.5 in size were laid for this job comprising of precast and cast insitu elements. The cast insitu elements were below the existing water table to some degree requiring dewatering of the area. In addition a standard 1650 culvert was also laid.

All this work has been undertaken by the same base crew who are skilled across the spectrum of civil construction activities and have worked on many of our dam and hydro scheme jobs.