Negative effects from having 6000 construction workers converging on Broome were seriously underestimated in the State's social impact assessment of the Browse liquefied natural gas precinct, an independent review says.
The confidential review was delivered in March 2011 for the Federal Department of Environment and released this week under Freedom of Information laws.
Author Annie Holden, of Impaxia Consulting, said most workers presented little risk but elements of large male construction forces fuelled by alcohol, long working hours and the heat could be antisocial as they looked to party.
She warned that rises in prostitution, sexual infections, sex assaults, relationship issues, drug trafficking and alcohol problems were possible.
Dr Holden said isolating the construction workforce in an accommodation camp was justified but it was unrealistic to think the proponent or local government could stop them going out in Broome.
With little documented research on the social impacts of mining construction, she said she had to rely largely on anecdotal evidence from literally hundreds of people.
Based on this . . . I am confident that the impacts of the presence of large construction workforces on host communities are seriously underestimated, she said.
Broome Shire president Graeme Campbell dismissed the findings, saying Dr Holden admitted her report had little hard data.
In Broome yesterday, Opposition Leader Mark McGowan said Labor had always supported building a gas hub at James Price Point but on the condition that any social effects were addressed.
He dismissed claims about antisocial behaviour by construction workers, saying it was offensive to people in the mining industry.
But he agreed local people were rightfully concerned about other issues raised.
Premier Colin Barnett said the accommodation camp would be 60km from Broome and operate as a closed camp.
He said Browse LNG processing would have many social positives for Broome and communities on the Dampier Peninsula.
These included private investment, employment and substantial benefits for Aboriginal people.
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