URANNAH DAM & PIPELINES PROJECT

Construction of a new dam on the Broken River at Urannah in Central Queensland, with additional components that include a water distribution network, comprising 200km of connecting water pipelines & instream distribution & storage of water. The project components, together with supporting ancillary infrastructure & associated works, are as follows: Urannah Dam – a new gravity fed dam at Urannah storing up to 970 gigalitres of water. Water distribution (pipeline) networks from Urannah Dam north to Peter Faust Dam & on to Bowen & Abbot Point, south to Eungella Dam & Moranbah, & in-stream flow within the Broken River & Bowen River, & associated ancillary works, such as pump stations & power supply infrastructure. Ancillary works & infrastructure such as quarries & borrows, road & access development & upgrades, site establishment areas, laydowns, site amenities & accommodation, services & utilities (including electricity, telecommunications). The dam will have a full supply level at RL 290 m Australian height datum & a full supply volume of 1,500,000 ML, with an annual yield of 150,000 ML. The associated storage area will inundate an estimated 10,500 ha. Dam crest length is expected to be in the order of 700m & 7m in width at an elevation of up to 301 m AHD. The dam height is expected to be in the order of 80m from the river bed (RL 218 m) to the maximum non-overflow section. The spillway will comprise a crest (up to 300 m long) & concrete channels or shutes together with dissipating infrastructure (plunge pools, stilling basins, etc.) to reduce the energy flow. Outlets will be required to facilitate flows downstream to meet environmental flow requirements as well as water supply demand. A multi-level intake tower will be used to selectively draw water from the reservoir storage. Fish passage infrastructure considered feasible includes a fish lock – fully manual system (trap & haul). The proposed water distribution network encompasses 4 main components: A northern distribution pipeline to Peter Faust Dam, approximately 67 km in length & with a capacity to supply 20,000 ML/annum to industrial, urban & agricultural users to the north, within the surrounding Proserpine area. Southern distribution pipeline network connecting Eungella Dam (with a capacity to supply 20,000 ML/annum to primarily industrial users within the surrounding Eungella area) & extending south approximately 150 km to Moranbah (with a capacity to supply 20,000 ML/annum to industrial users). Instream distribution which follows the natural course of the river and supplies 90,000 ML/annum to primarily mining customers at Collinsville & Newlands, & to supply a proposed irrigation precinct (Collinsville Irrigation Scheme) along the Bowen River.The instream distribution network would involve instream delivery from Urannah Dam to Bowen Weir via the Broken & Bowen Rivers. New pump sets would be required to lift water from the Bowen Weir pool to piped distribution networks on the right and left banks. Works would involve: River pump stations on both sides of the river banks at Bowen Weir, sourcing electricity to the site, adding an outlet structure to the existing GOSS. The precise location of water distribution pipelines is yet to be determined following additional studies which will seek to optimise suitable northern and southern alignments in consideration of environmental and social values, including landholdings, together with technical feasibility & engineering design considerations & cost efficiencies.