The city of Hamm (client) is putting out to tender the framework agreement for the desilting of the spa park ponds throughout Europe.

The bidder must provide the desilting of the spa park ponds.

The desilting of the filled ponds was carried out by means of a boat, suction pipe, treatment of the sediments and water recirculation. For this purpose, the sludge must be sedimented into coarse material, sand and sludge and dewatered before removal and disposal.

In order to keep the impact on the ponds and the spa gardens as low as possible, the sediments from the pond must be removed using floating technology with water recovery, mechanical dredging (e.g. long-arm dredging) is not permitted.