Dights Falls Fishway - Aqua Metro Pty Ltd

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Dights Falls Fishway

Background

An Original weir from 1840’s got redesigned and as a result the effectiveness of the fishway was compromised. It was found that multiple species of fish were unable to use the fishway to travel upstream which was a part of their natural migration habit.

Scope of Service

The major items of work in this project include :

Construction of a new pit with a penstock in front off and adjacent to the existing fishway. This activity involved installation of 3m deep rock anchors into solid bedrock followed by mass concrete footing.
Installation of penstocks around the existing fishway openings.
Modifying the existing slab over existing sutro weir and associated grating works.
Strategically placing each rock in the river to streamline the flow in order to encourage the fish to use the path for their natural migration.

The greatest challenge in the project was working below the river level.