A security fenced cage will house the
transformer and switching equipment and include a pole to support
the overhead transmission lines towards Glen Mutchin and ultimately
into Washbourne Creek and connection to the existing grid. The cleared
area will be limited to the area of the building and fenced area
plus four metres. The access road will terminate outside the building
at a vehicle parking area of approximately 50m2, which will be the
work area for construction of both the powerhouse and the spillway.
The spillway will involve the excavation of material
from the river bank which comprises boulders of up to 1.2 metres
in diameter and this indicates considerable stability exists in
the bank at this point. The draft tube from the turbines is expected
to exit via the spillway into the river at an oblique angle of 45
degrees to the downstream flow via a concrete wing wall structure
and pad at river bed level.
An approved composting toilet will be provided for
construction and for the later use of maintenance personnel and
Environmental Impacts / Mitigation
Impacts are expected from both the construction and
operation phases. These include:
- Vegetation clearing.
- Bank stability
In addition, the construction phase will include
the possible impacts of spillage of fuels or oils or concrete materials
into the river itself.