Midtre Romerike Avløpsselskap IKS (MIRA) is building a new waste water treatment plant at Tangen. The plant will serve Gjerdrum, Fet and Sørum municipalities. Sweco is responsible as design manager and consultant for the transfer plant from Gjerdrum and Sørum municipalities.
MIRA treatment plant
Midtre Romerike avløpsselskap IKS
Sørum and Gjerdrum municipalities
Completed in 2016
Pipeline engineering, hydraulic modelling of mains water and sewerage pipeline network, roads and streets, RAV analysis, risk assessment, environmental impact assessment, third party control geosciences, responsible applicant
This is a sustainable environmental measure which, in accordance with the EU Water Framework Directive, conserves, protects and improves the environmental status of rivers.
Varied terrain and ground conditions
The new transfer plant will channel all waste water from Gjerdrum and Sørum municipalities to MIRA IKS. The plants extends across natural and built-up areas and covers 17 km of transfer pipeline for waste water, four pump stations and three pressure basins. Horizontal directional boring and auger boring had to be planned on a long stretch of the pipeline. Pipeline dimensions vary from ø315mm to ø710mm PE pipe. Geotechnical challenges throughout the whole system have been resolved through directional boring and stabilising measures in the terrain.
Long-term environmental considerations
To ensure that environmental requirements stipulated in acts and regulations are complied with, an environmental follow-up plan for the project has been established. This ensures that environmental considerations are addressed in the implementation phase and during operation of the completed plant.