After receiving his degree in civil engineering at the Technical University in Arnhem, Koos Spelt started at Baggermij Boskalis b.v., becoming chief surveyor and superintendent on several sandfill and dry-earth moving jobs near Rotterdam. He has worked in Nigeria (Port Harcourt), in Singapore, and was project manager in Kota Bahru, Malaysia. In 1992 he became project manager on several riverbed protection projects in Germany. In 1994 he was project manager on a pilot project to do environmental dredging with backhoes within 10 cm accuracy to clean up sand out of polluted sludge, using new dredging techniques with the environmental dredger Vecht on the highly polluted Ketelmeer. At the moment he is project manager on the Naviduct project in Enkhuizen, The Netherlands.
Articles By Koos Spelt
Compacting sand into tubes made from geotextiles is an important innovation in hydraulic engineering techniques for sustainable construction work.
Private dredging companies and government have joined forces to develop environmentally sound techniques for dredging thin layers in the highly contaminated Lake Ketelmeer, The Netherlands.