Renovation of the Schwarzbach combined wastewater sewer

Summary

The tender covers renovation of the existing Schwarzbach combined wastewater sewer in Essen, between Beekerwerth and Auf’m Berg, and construction of a new junction manhole on Kellinghausstraße. Glass-fibre reinforced plastic liners with diameters of 924 mm and 1,434 mm are to be installed in different sections. The works include temporary wastewater bypasses, excavation and manhole construction, cleaning and inspection of the existing sewer, liner installation and annular-space filling, lateral connections, manhole repairs, watertightness testing, and reinstatement of roads, paths and green areas. Work must start no later than 12 working days after receipt of the award letter and be completed within 150 working days. Working hours are restricted to weekdays from 07:00 to 20:00; night, Sunday and public-holiday work is not permitted under the ordinary arrangements. Bidders must account for traffic management, excavation safety, protection of existing utilities, ground conditions and possible unexploded ordnance, and the proper handling and documentation of waste. Proof of business liability insurance and compliance with data-protection obligations are required. The provided documents do not specify turnover, reference-project or staff-qualification thresholds.