Quinns Rocks residents remember a time when they could swing from monkey bars and look out to the ocean.
But severe storms this winter forced the City of Wanneroo to demolish the playground at the popular Quinns beach foreshore.
"The erosion has come so far back they had to remove the playground for safety reasons," long-time resident Natalie Sangalli said.
"We have lost 100m in 30 years and the beach is eroding at least one metre every year."
Ms Sangalli spearheads the Save Our Foreshore Quinns Beach group, which has called on authorities to restore the foreshore to its original beauty.
More than 2000 group members signed a petition, tabled in State Parliament on Tuesday, urgently seeking a long-term strategy to resolve degradation along the Quinns Rocks coast.
Some members claim developments such as Mindarie Marina and coastal groynes interfere with ocean currents and worsen erosion.
Curtin University professor of applied geology Lindsay Collins said though he had not seen the specific problem, a careful study of the issues at Quinns beach was required. "The severity of the storms in winter will often determine how serious a coastal erosion problem might become," he said.
The State Planning Strategy changed earlier this year to stipulate developments should not occur within 100m of the coast.
Professor Collins said developments within this zone, including houses, groynes and other structures, could interfere with natural processes.
Locals say when Quinns Rocks was first developed in 1958, more than 100m separated the street and ocean. "Now it is close to 15m," Ms Sangalli said.
Residents along the foreshore voiced concerns about the ocean reaching their houses, metres from the playground.
The playground was removed late last month and the beach was closed to remove washed-up seaweed.
Authorities are expected to release a comprehensive study on the future of the Quinns Rocks coast- line next month.