Each side of the monument would measure 8.5m and it would reach 12m northwards with steps built for ease of access, Mr Sizemore said.
"The main thing was the marae atea, we've taken the wall down that used to sit there and are putting a new flag pole in to fly bigger and more flags."
The pole would be 12m tall and would be able to fly three flags at once. The existing pole was restored and installed at the Mission Cemetery.
The marae atea was designed with input from the Pukehinahina Trust and was funded by the council.
On April 1, the Bay of Plenty Times reported an archaeological dig was being carried out at the reserve before eight carved poles, known as pou, were installed.
The pou, the flag pole and the carvings flanking the memorial were funded by the Pukehinahina Trust.
Archaeologists did not find anything at the pou sites but at the flag pole site, some shrapnel and bits of glass were found.
Remnants of trenches dug by Maori were also found at this site and showed there were trenches in different locations than previously thought.
The artefacts would be stored and eventually be displayed in a museum.