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This document is a desktop study of culvert material and design in the context of the Avon River basin (ARB), prepared for the Avon Catchment Council’s Surface Water Management project (IWM 006). The changing hydrology of the Avon catchment and the associated water quality issues prompted the inclusion of the following Management Action Target in the project’s scope, L1 MAT 3.2 Assess alternative culvert materials and designs to suit changed catchment hydrology by 2007; The oftenpoor water quality associated with surface water flows in the ARB can lead to the premature degradation of road assets. This can impose a significant, and at times unnecessary, cost on Shires across the catchment.