Mr Zohs said that, as a result, a lot of the material had to be manhandled across to the playground as opposed to being dumped directly on the site.
"We had to wheelbarrow concrete into the site," he said.
The Playground Centre part of the work is likely to be finished by Thursday but surrounds still need to be put in before the facility is reopened.
Popular playground equipment such as the flying fox, the witch's hat and the pirate ship will remain in the playground.
"We've kept the flying fox because it's quite popular with the locals," Mr Zohs said.
The council's Community Projects Team is also involved in the playground work.
Wanganui District Council senior parks officer Wendy McGhie said the council budgeted $100,000 for replacement equipment, safety surfacing and installation.
Ms McGhie also said that about $5000 had been spent on ground work and retaining walls.
"The Mowhanau playground will provide more play opportunities for children of a wide age group range from toddlers up," she said.