Port of Portland Limited is a major bulk commodities port located on the western side of Portland Bay to the north of Point Danger, Victoria, Australia. The construction of breakwaters in the 1950’s interrupted the south–to-north longshore transport of sand along the western foreshore of Portland Bay. Sand is accumulating on the south-eastern side and around the head of the Main Breakwater, resulting in a sediment deficit and erosion down-drift (north) of the port. The ‘Sand By-passing and Smelter Obligations Deed’ (the Deed) enacted on 6 March 1996 requires the Port to by-pass 150,000 cubic metres of sand every three years. The activity is undertaken under a Victorian Marine and Coastal Act Consent. Worley are supporting the Port to obtain the next 10 year approval for the activity through the preparation of marine ecological and coastal processes assessments, that aim to assess long term changes to the local environment as a result of the sand by-passing. We present the results of recent marine ecological surveys undertaken at the Anderson Point placement area and in the Portland Special Management Area where intertidal and subtidal rocky reefs, protected seagrasses and diverse macroalgae assemblages occur, comparing these to historical surveys. We also present the results of coastal processes and interpretive sand movement reports that have been prepared to assess changes to beach profile over time and assess the effectiveness of the campaign in mimicking natural sand movements. Traditional marine and coastal survey techniques and study results are supported by aerial imagery and drone footage undertaken by the Port during the most recent sand by-passing campaign.