Onslow Power Infrastructure Upgrade Project

Overview

Horizon Power is proposing to construct a new dual fuel natural gas and diesel-fired power station and associated infrastructure on a site located approximately 18 km south of Onslow together with a 16 km long double circuit 33 kV electricity transmission line connecting the power station to a new zone substation located about 2 km south of Onslow.  The power station will have a nominal installed generating capacity of 18 MW, consisting of five 2 MW gas fuelled reciprocating generating sets and four 2 MW diesel fuelled reciprocating generating sets with associated infrastructure to accommodate redundancy and future growth in demand.  Natural gas will be supplied from a natural gas offtake pipeline connected to the Dampier to Bunbury Natural Gas Pipeline.  The construction of the natural gas pipeline lateral does not form part of the proposal.  The proposal will require approximately 100 hectares of vegetation to be cleared. 

What happens next

Following the seven day public comment period and consideration of any comments received, the EPA will decide whether or not this proposal requires environmental impact assessment and, if so, what level of assessment will be applied.

The Chairman's decisions on level of assessment are released each Monday on the EPA's website.