Sector Water
Year 2022-23
Location Eurobodalla, NSW
Client Eurobodalla Council
Value $115m

The Eurobodalla Southern Water Supply Storage Dam is a generation-defining infrastructure project entailing construction of a 3000 Megalitre Off-River Storage Dam that will ensure water security in the Eurobodalla Shire.

The Dam – adjacent to the mighty Tuross River in the Bodalla State Forest – is the second facility of this magnitude that Haslin have delivered, after the $36 Million Bowraville Off-River Storage Dam.

Key features of the off-stream storage facility include:

• capacity to hold up to 3,000ML of water
• a 370m long embankment, 39m in height and a crest width of 20m, located on an unnamed tributary of the Tuross River
• a spillway to allow the dam to release water from heavy rainfall events into the Tuross River
• permanent erosion control structures located downstream of the spillway
• an inlet to convey and dissipate raw water transferred from the river intake pump station through a pipeline
• an outlet to allow transfer of water from the storage to the existing water treatment plant (WTP)
• instruments to monitor seepage, reservoir levels and water quality
• a thermal stratification control system
• a boat ramp at the water storage facility for maintenance and access for water quality monitoring
• safety and perimeter fencing at the water storage facility.

Key features of the ancillary facilities include:

• a new pump station with capacity to extract up to 26ML from the river and up to 6ML from the borefield
• water transfer infrastructure with:
  • a pipeline with a capacity of 26ML per day to transfer raw water from the new river intake pump station to the storage inlet chute
  • a pipeline connection from the borefield to the river intake pump station
  • a storage access road roughly 1km long from Eurobodalla Road opposite the WTP to the site
  • a 70m long access road for vehicles to access the river intake pump station
  • power supply including new sub-stations near the storage and pump station.