The independent expert Associate Professor Keith Walker says that the mitigation .
The independent expert Associate Professor Keith Walker says that the offset strategies such as the Freshwater Species Conservation Centre were inadequate , risky and ill - defined and that the proposed fish and turtle ladders were unproven .
The independent expert Associate Professor Keith Walker says that the mitigation and offset strategies such as the Freshwater Species Conservation Centre were inadequate , risky and ill - defined and that the proposed fish and turtle ladders were unproven .