Paterson, B.R. 1977 Geological reconnaissance of proposed Buller thermal power station sites. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 279 13 p.
Abstract: Geological appraisals of 3 proposed thermal power station sites are outlined in this report as well as general geological data for an area of 3 additional sites. Sound hard rock foundations are expected on the coal plateau at the proposed Repo Stream and Mt Stockton thermal power station sites. The supply of construction materials for both sites and in particular for the Repo Stream dam may be critical. Active coastal erosion could place severe limitations on any power station site, including the one at Birchfield, located on the coast north-east of Westport. Inadequate foundations could also be critical at these sites. Sites located on the flats south-west of Westport may have adequate foundations at shallow depth. No active faults have been mapped near the sites investigated. Because the area is tectonically active and is subject to high seismic risk the design of the structure and the nature of the foundations will be critical.