Three new rock walls are being built along the Omokoroa foreshore to prevent further erosion and protect the community's much-loved seaside walkway.

More than 4000 tonnes of rock is currently stockpiled at the Omokoroa Reserve as contractors begin efforts to transport it.

A section of old rock wall, which will be joined to one of the new walls.

And that is not an easy task, says Western Bay of Plenty District Council's procurement and projects manager Peter Clark.

As the rock must be moved along the coastline to reach the right locations, special low pressure tyre trucks are needed and can only travel at low tide, says Peter.

About 200m of wall will be constructed in total, which will join up with three walls already in place, built in 2006, 2010, and 2013.

"The popular walkway along the coastline has already been damaged by erosion, and some of the piping is at risk. These rock walls will help prevent further erosion, and help protect the sandbanks."

Work is expected to be complete by October 1.

A portion of the old timber seawall along the Omokoroa esplanade is also being replaced this month.

About 180m of the wall was left damaged and in poor condition following recent storms. A further 100m was unharmed and will remain for several more years.

Council staff member Scott Parker says the new seawall has been professionally designed to be much stronger than the old structure.

During construction, the timber steps onto the beach will be replaced and both nearby dingy ramps will be repaired, as well as work on the roadside berm, he says.

The wall is expected to be complete this week. While new grass grows, temporary fencing will remain in place.