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Vorderberg separate sewer system

Municipality of Oberwil (Canton of Baselland), 2009–2015

Utility mains trench in Blauenstrasse

Preliminary and main design, construction.
Highway and utility engineering, hydraulic engineering, phased construction
Uncovering and renaturalization of Fraumattbach stream (600 m), new clean water sewer (2 000 m), measures to reduce infiltration into sewer system, refurbishment of combined sewer, utility lines map.