AN EXCAVATOR isn't something you would normally see on Seven Mile Beach at Lennox Head.

But Ballina Shire Council has deployed it to help fix a stormwater pipe which was damaged during recent storms and erosion.

Two lengths of the stormwater pipe will be replaced.

The council's natural resource extension officer, James Brideson said the council had also undertaken some safety mitigation works on the beach.

"Some of the beach access tracks had to be closed because of the erosion and the very low sand levels," he said.

"Since then most of the access points have been re-opened, but there are some tracks that remain closed and will remain closed until sand levels build up again.

"This is a dynamic shoreline and things can change quickly.

"We are encouraging people to only use the beach access tracks that are open.

"It is important, for safety reasons, for people to stay off the closed tracks."