Wassara at the conference Dam Safety 2013 in USA

In September 8-12, the Association of State Dam Safety Officials (ASDSO) hosted a conference about dam safety. It claims to be one of the leading conferences in the United States, dedicated to dam safety engineering and technology transfer.

In conjunction with the conference, Dr. Donald Bruce released a white paper called ”THE HISTORY OF DOWN-THE-HOLE DRILLING AND THE USE OF WATER-POWERED HAMMERS”.

Wassaras Peter Johansson during the presentation of the white paper