Dimiter Dimitrov remembers his toughest cleaning job ever. The tool that saved the day was a waterjetter.Dimitrov heads Double D Engineering Ltd. in Bulgaria, part of Russia-based Zevs Technology. He and his crew have been in the industrial drain-cleaning business since 1998, but they had never received a call like this.The job involved blockage of a critical drainline beneath a large artificial lake at Dospat Dam in Bulgaria. The clogged conduit posed extreme danger to the dam wall’s integrity – and to local residents.A crew from Double D used a portable waterjetter in a slow, methodical process to clear the
