Seaham Weir Refurbishment and Modification Project
We're upgrading Seaham Weir on the Williams River to improve safety, enable effective management of water flow, maintain the weir pool's water levels and improve fish passage.
About the Weir
The Seaham Weir is located on the Williams River, 600m north east of the Seaham township.
The Weir is more than 50 years old and consists of a rock weir, concrete spillway, flow control gates and a fishway. The Weir structure crosses the Williams River creating a large pool protected from tidal saline water. The Weir pool is an important freshwater source that feeds into Grahamstown Dam, providing drinking water to the communities of Newcastle and the Lower Hunter.
The works will include:
- safety and compliance refurbishment of the existing weir gates
- installing four new low flow weir gates on the eastern side of the Weir to allow smaller releases of water when needed
- installing a new fishway on the eastern side of the Weir for improved fish passage both up and down the River.
This project is part of Hunter Water’s program to replace and upgrade water and wastewater-related assets across the Region. Hunter Water looks forward to continually improving the infrastructure that delivers quality outcomes for both the community and the environment in which we live.
The general program of design and construction timings have recently been updated to reflect new project completion dates:
- Refurbishment of existing weir gates: August 2021 to September 2022
- Low flow gates and fishway design phase: August 2021 to August 2022
- Construction of low flow fishway and gates: November 2021 to November 2023