Meeting the challenge to revitalise the Snowy River
Snowyhydro undertook the upgrade of the Jindabyne Dam to provide for environmental flows into the Snowy River.
"State of the Art" engineering features were an integral part of the project and includes:
•
A 32 metre high inlet tower
•
Modifications to the existing spillway including a 42 metre wide concrete discharge chute
•
A 93 metre wide auxiliary spillway
•
A plunge pool measuring 90 metres by 60 metres and 15 metres deep
•
A concrete lined water transfer tunnel measuring 3.6 metres in diameter and 360 metres long
The work also included an inlet tunnel to provide for a future mini hydro electricity generating plant.
The project commenced in June 2004 and is expected to be completed late 2006.
The principal contractor Belmadar Constructions engaged Boral Country Concrete & Quarries to provide an on site mobile premix concrete plant , this with the backup of the Boral Jindabyne premix plant provided:
•
25,000 m3 of 32 mpa concrete for the Dam Wall
•
5,200 m3 of 32 mpa concrete for the Flood gates
The concrete was produced using Shrinkage Limited cement from Blue Circle Southern Cement' s Berrima production plant and Mount Piper Fly Ash.
Blue Circle Southern's Shrinkage Limited with Fly Ash assisted to provide a lower heat of hydration and to meet the tight 550 microstrains shrinkage limit required by the design team.
Boral Concrete also supplied Eroc Tunnelling and Mining Services with:
•
3,500 m3 of 32 mpa concrete for the tunnel linings.
The concrete for the tunnel linings was produced using Blue Circle Southern Cement's Shrinkage Limited cement and Neat Milled Slag. This gave the concrete lower shrinkage with workability and some sulphate resisting properties.
