Technischer Bericht NTB 86-10
Sondierbohrung Leuggern Bau- und Umweltaspekte Bohrtechnik
The exploration well at Leuggern was realized as the sixth well within the Nagra Deep Drilling Program in Northern Switzerland.
The drilling work was started July 9, 1984. Having reached the final depth of 1688.9 m on February 19, 1985 the test phase was then initiated and completed by May 24, 1985.
In summer 1987 the installation of the long-term monitoring system for five zones was executed. The installation was finished on the day of October 2, 1987.
The present report presents the drilling activities, civil construction work related to the site and precautions taken to account for environmental protection aspects.
A chapter dealing with the commission representing members of the federal, cantonal and local authorities and reporting is given at the end of this report.