Birth and death of ''The Rogue'': a history of Drillhole 204, Wairakei

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Thompson, G.E.K. 1976 Birth and death of ''The Rogue'': a history of Drillhole 204, Wairakei. : . Report / Geophysics Division 117 19 p.

Abstract: Investigational drillhole No. 204 was one of a series at Wairakei, sited with the object of defining the western boundary of the Geothermal Field. Problems during the initial and early stages of drilling in 1960, followed by an uncontrollable steam eruption adjacent to the site, forced the abandonment of the hole after reaching a depth of 374 m. Erosion of the wellhead surroundings was so rapid, that within a week, the discharge was issuing vertically from the drill casing at the bottom of a crater approximately 15 m diameter and 30 m deep. After some months of relatively stable, dry steam discharge, ground water invaded the crater eventually formed a boiling muddy lake which commenced discharging intermittently over the crater rim. Ground vibrations became pronounced and periodic geysering developed. This state of activity continued until late 1963, when an unsuccessful attempt to control the feature by damming the overflow and flooding, was made. Tourists visited the area, then known as ''The Rogue'', from 1968 for more than 5 years until after a period of declining intensity, all activity at the site ceased in October 1973.