Sewer mains Haapajärvi-Nivala

Sewer mains construction contract

  • Sewer mains 28 km
  • Air extraction and service wells with shut-off valves 20
  • Cottage pumping stations 3
  • Waterway undershoots 2
  • Branches to houses 70

Customer: Vesikolmio Oy (a wholesale water company owned by the Northern Ostrobothnian Centre for Economic Development, Transport and the Environment and the municipalities of Kalajokilaakso)

Contract time: 2011–2012