Sewer manhole cleaning services

Summary

The tender concerns cleaning and emptying the manholes for the municipality of Diemen. There are 8,900 manholes in total, of which 7,500 can be cleaned mechanically and 1,400 must be cleaned manually because a truck cannot reach them. The work must be carried out twice a year: once in spring (April/May) and once in autumn (October/November). The tasks include removing dirt such as sand and leaves, cleaning the manholes, and checking and keeping the drainage clear.