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Councils, Engineers and Designers

A growing body of evidence is identifying plastic pipes as the sustainable choice for development — now and in the future. Plastic piping systems are strong, durable, light-weight and flexible, requiring significantly less energy to fabricate, transport and install than either the metal or concrete alternatives....

Poorly designed instream structures (including culverts, weirs and dams) are a significant contributing factor in the declining populations of New Zealand’s native freshwater fish. According to DOC, about 70% of New Zealand’s native fish are threatened or at risk and the main factor in these declining...