GFWAust constructed a grout curtain around the No 3 Vent Shaft to limit water ingress into the shaft.

Resource Pacific Limited owns and operates the Newpac No.1 Colliery, which is the largest remaining semi-soft coking coal reserve in the region. 4.0 Mtpa longwall operations commenced in January 2007. No.3 ventialtion shaft is part of the mine development program.

The 145m deep, 5m diameter shaft was excavated by Raisebore Australia. Large intakes of water in excess of 2 l/s were encountered during drilling of the pilot hole. Grouting and Foundation Works Australia provided grouting expertise to identify and treat this groundwater ingress. This included watertesting to investigate permeability in the 330mm diameter pilot hole and design and installation of a grout curtain around the proposed shaft.