CzSTT was formed in 1993 and affiliated on 19.10. 1994.CzSTT has now 73 members, out of which 54 corporate. Every year the Society organises national conferences with international attendance. In 2001, the CzSTT organised a successful 19th International Conference and Exhibition NO-DIG Prague 2001. For its members the Society issues the "NODIG Bulletin" four times a year in which there is a space for publishing available to all those interested in the trenchless technologies.