A number of measures to reduce impacts on aquatic animals have been implemented.

Examples on the right

1. On the Coolongolook to Wang Wauk project, a fish-friendly culvert was built below stream bed level with scour protection to help fish passage during low to medium flows.
2. Pipeclay Creek bridge structure was designed and built to promote fish passage.
3. Fish-friendly culvert at Nabiac Creek. A low flow cell with rock energy dissipaters to help fish passage in high velocity flows.
4. Floodgates were installed on a drainage channel that flows into the Lansdowne River on the Coopernook bypass project to rise and fall according to tidal flows.