19thC Goldmine excavations in New Zealand unearth Victorian era treasures - The Martha Goldmine at Waihi in the North Island of New Zealand was a major producer of gold and silver between 1888 when mining commenced and 1952 when the mine closed. The Pumphouse structure was classified as a building of national significance by the New Zealand Historic Places Trust in the 1970s. Due to land instability, the Cornish Pumphouse was in danger of catastrophic collapse and it was leaning 2 feet out of perpendicular and increasing. The decision was taken in late 2005 to shift the Pumphouse to a safe location by cutting off the Pumphouse some 4 meters (13ft) below the ground surface.Using concrete slider beams capped with steel and stainless steel sheeting, the 1,800 tons was suspended using hydraulic flat jacks sitting on Teflon pads with lots of lubricant, then pulled with horizontal hydraulic rams.