Cleaning of gravity sewers, including special structures and road inlets, as a framework agreement

The framework agreement covers the maintenance cleaning of 112 km of sewers, 98 km of storm sewers and 35 km of combined sewers as well as shaft structures using the high-pressure flushing process. Other components include the cleaning of pumping stations, sand traps, culverts, box gutters, wet and dry sludge road drains as well as road drains with Rovalipua inserts. The contractor is not entitled to complete commissioning of the total scope of services in each year.