"People were sitting on their roofs, hearing the water hit the wall and ricochet - this loud sound - and then waves of water would rush back across the town," recalled Evans Head resident Lyndall Murray, reflecting on the devastating night of February 2022, when floods ravaged the Richmond Valley in Northern NSW." The turbulation in the water was created by the wall, and that's probably what scared people, clinging to their roofs, the most. They didn't know if they'd survive the night."

Two years later, the scars of that disaster remain. Residents are still struggling to rebuild from a catastrophe they believe was made worse by the highway acting as a dam wall. The water stagnated for 12 days, trapped west of the highway, when other communities were able to clean their homes.

For more than a decade, locals had warned governments that the new Pacific Highway upgrade would act as a dam, exacerbating floods in communities upstream. When the floods came on February 28, 2022, the devastation was unprecedented. Thousands of homes and businesses across the Northern Rivers region were ravaged. Residents in towns downstream of Lismore, like Woodburn, Broadwater, Coraki and Wardell, had never experienced anything like it. 

As the Hawkesbury awaits the results of the flood study and final designs for the new Richmond Bridge, concerns are rising about the impact a raised road on the floodplain could have. The parallels to Richmond Valley are hard to ignore. Woodburn resident, Bert Plenkovich OAM, told the ABC in 2022, "Why would you put a highway on the lowest possible area of the floodplain when you have an option to place it on higher ground? We could see that it would hold back flooding."  

In the Hawkesbury the former NSW government ignored the advice of their experts to build the bridge south of the current bridge - known as the Purple Route. This route provided the most flood resilience and the least impact on surrounding properties. Instead, the bridge will now be built 50 metres downstream from the current bridge in one of the lowest parts of the floodplain and will require raised roads to ensure it can be accessed in a 15.3-metre flood. Kurrajong Road on the eastern side of the bridge is just 12 metres. 

The aftermath of the Richmond Valley floods included talk of a class-action lawsuit against the government for damages caused by the highway. However, the toll of the disaster left most residents too exhausted to pursue legal action.

 "These people lost everything," Murray said. "The $790 million Resilient Homes Grant was rolled out too slowly, and 5,000 homes were rejected for funding in June 2023. "Most of our community are on pensions or disability payments, so when people are trying to make ends meet, any energy left to try and campaign for a class action, lost traction because of the magnitude of the rebuild for the community," she said.

Despite the community's efforts to seek accountability, residents remain in the dark about the true extent of the highway's impact on the flooding. A promised investigation into the flood modelling remains hidden from public view. "Transport for NSW (TfNSW) is completing modelling validation in respect of the record flooding that impacted Woodburn in February and March 2022," a TfNSW spokesperson told the Hawkesbury Post. "This modelling is privileged and cannot be released to the public," he said. When we asked why the information was privileged, TfNSW did not respond.

The floodwaters in Richmond Valley didn't just inundate homes; they lingered for 12 days, causing severe damage to foundations and leaving entire communities underwater long after the floods receded in other areas. Murray emphasised the difference between Richmond Valley and neighbouring Lismore: "In Lismore, the water came up and down quite quickly. But for 12 days, our water stayed stagnant through people's homes because there was no escape route for the water to reach the wetlands and flow to the ocean."

Most believed the key issue was the design of the new road. The drainage holes built under the highway were too small to handle floodwater and debris, effectively blocking the natural flow of water. "If you get one tree branch caught on that drain, there's no water going anywhere," Murray explained.

Residents are frustrated with what they see as a systemic failure of government agencies to listen to local voices. "This is a testament to the epic failure of the State government to listen to local knowledge," Murray said. "Experts ignored generations of lived experience from the people who know these floodplains intimately."

Despite raising concerns during consultation meetings as early as 2006, locals found their input sidelined or excluded from official records. Some meetings weren't even minuted, forcing residents to fight to have their insights recorded. Even as government agencies promised transparency, crucial design changes ignored local knowledge. A flood-free alternative route was also proposed by residents but ultimately rejected.

Rumours persist that cost-cutting measures played a role in the flawed infrastructure design. However, with the investigation's findings kept secret, the community is left in the dark. "We deserve transparency," Murray said. "People who invested their life savings in their homes or businesses deserve to know what went wrong and how it will be fixed. But we've seen nothing from the government."

Murray's warning to the Hawkesbury is clear: "These infrastructure projects need to be informed by local knowledge. If they build that bridge and those roads without listening to the people who know the floodplain, it will be a disaster."

Residents are taking matters into their own hands. "We've already started preparing for the next flood," Murray said. "We know the water will stay for days again. We're setting up our own crisis management plans because we have no faith the government will be there to help us."

Murray's message is simple: "We need accountability from those making these decisions. Until they start listening to locals and applying common sense, we're going to keep facing these disasters, and people will continue to suffer."