| Accommodation camp |
Area used for temporary housing and facilities for construction personnel |
| Adit |
Temporary access tunnel for access to underground construction areas |
| Backfill |
Refill an excavated hole with the material dug out of it |
| Blind sink |
Excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom |
| Boring / shaft boring |
Excavating a shaft downwards, usually from the surface |
| Cable yard |
Permanent site for the high voltage transmission connection from the NEM to Snowy 2.0
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| Capital investment value |
All costs necessary to establish and operate the project, including the design and construction of buildings, structures, associated infrastructure and fixed or mobile plant and equipment |
| Communications cable |
Fibre optic cable to provide a communications connection |
| Construction compound |
A temporary site used for construction ancillary facilities and laydown |
| Construction footprint / disturbance area |
The area subject to clearing and ground disturbance |
| Contractor |
Contractor engaged by Snowy Hydro Limited to construct the Snowy 2.0 Main Works |
| Drill and blast |
The controlled use of explosives to break rock for excavation |
| ECVT |
Emergency egress, cabling and ventilation tunnel |
| Excavated rock |
Hard, compacted, or cemented materials that have been removed using blasting or other excavation methods |
| Firming capacity |
Energy available within the network to respond to demand when other energy sources, such as intermittent renewables are not operating (due to low wind or low sunlight) |
| Gate shaft |
A shaft for the gate tower bored at the highest ground along the wet tunnel alignment, approximately 200 m away from the intake mouth |
| Generating mode |
When water flows from Tantangara Reservoir into Talbingo Reservoir, providing on-demand energy generation |
| Headrace surge shaft |
A shaft structure constructed from the surface and breaking through to the headrace tunnel, most likely using a blind sink method |
| Headrace tunnel |
The upstream tunnel between Tantangara Reservoir and the underground power station |
| Hydro-electric |
Generation of electricity using flowing water (typically from a reservoir held behind a dam or barrage) to drive a turbine which powers a generator |
| Intake gate |
A gate installed at the entrance of the headrace or tailrace tunnels to allow/stop water from entering the tunnels |
| Kosciuszko National Park |
A National Park protected under the NSW National Parks and Wildlife Act 1974 and managed by NSW National Parks and Wildlife Service. It covers an area of 673,543 hectares and forms part of Australia's only Alpine area |
| Laydown area |
An area for laydown and maintenance of construction plant, equipment and materials storage |
| Lobs Hole |
A remote campsite and former settlement location within Kosciuszko National Park |
| Lobs Hole Ravine Road |
The main access road to Lobs Hole |
| Marica camp |
Main Works accommodation camp at Marica |
| Marica Trail |
Access road to Marica |
| Portal |
Location of surface connection with the Main Works tunnel |
| Power station |
The 2,000MW underground pumped hydro-electric power station proposed for Snowy 2.0 |
| Project area |
The area required to access and build project infrastructure, including surface and tunnel components of the project |
| Snowy 2.0 |
A pumped hydro-electric expansion of the Snowy Scheme that will link the two existing reservoirs of Tantangara and Talbingo through underground tunnels, and include a new underground power station with pumping capabilities |
| Snowy 2.0 Transmission Connection Project |
Project proposed by TransGrid to connect Snowy 2.0 with the existing high voltage transmission network subject to a separate application |
| Storage mode |
When water is pumped out of Talbingo Reservoir to Tantangara Reservoir, to provide large-scale energy storage |
| Surge shaft |
A hydraulic structure designed to control pressure and flow fluctuations in the tunnel |
| Tailrace surge tank |
An underground shaft structure off the tailrace tunnel west of the power station complex at the start of the tailrace tunnel |
| Tailrace tunnel |
The downstream tunnel between the underground power station and Talbingo Reservoir |
| Talbingo intake |
Water intake structure to be constructed at Talbingo Reservoir |
| Tantangara camp |
Main Works accommodation camp at Tantangara |
| Transformer |
An electromagnetic device used to change the velocity of ac electricity |
| Transmission |
The conveyance of electric energy |
| Turbine |
A machine which coverts the energy of water to mechanical energy |
| Variable renewable generation |
Intermittent renewable wind and solar energy sources that are non-dispatchable and fluctuating in nature |
| Water intake |
Structures at Talbingo and Tantangara reservoirs used to take water in and out of the headrace and tailrace tunnels |
