The plan will run lines from the site of the proposed Borumba Dam pumped hydro plant in the Mary Valley to substations at Woolooga, about 35km west of Gympie, and Halys in the South Burnett.

A total of seven dams would be required for the project on the Mary River system, including an "upper reservoir" 1.5 times the size of the existing Borumba Dam. The proposal has one main reservoir ...