Shire staff assessed the damage to the trail, in the centre of Gingin, as soon as they were able after the incident and determined that 138m of timber needed replacing.
According to shire president Michael Aspinall, up to $150,000 damage was caused, which the shire hopes can be recovered through insurance or restitution from the arsonist.
‘What also really surprised me was the unfortunate damage to the trees along the boardwalk after the water bombers,’ he said.
It is anticipated the work will be completed while weather conditions are favourable.
The shire will carry out the work in consultation with the Department of Parks and Wildlife and the Department of Water.
The trail provides a thoroughfare for visitors wishing to explore the natural environment of Gingin Brook.