Project at a Glance
Key features:
  • Alternative solution analysis including life cycle costing
  • Reconstruction of 1200 mm diameter feedermain
  • Tunnelling under the existing Transitway (13m deep shafts)
  • Pipe material selection and corrosion protection
  • Fast tracked schedule
  • Groundwater management system
  • Traffic management & construction staging
Construction value:
$6,500,000.00
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Woodroffe Avenue Feedermain Relocation
CITY OF OTTAWA

The expansion of the Southwest Transitway and expansion of Algonquin College required the replacement and relocation of an existing 1200mm diameter feedermain.  Robinson Consultants undertook the preliminary and detail design for approximately 480 m of the 1200mm diameterwatermain relocation in the Woodroffe Avenue and Baseline Road area. Detailed modeling, analysis, coordination and mitigative measures were undertaken to ensure that this watermain, which feeds a wide area including Kanata and Barrhaven, continued to provide service during the construction. The design incorporated modifications to the existing distribution system under ‘live’ conditions in preparation for the watermain connections. The project had a fast track design schedule as the relocation work was required prior to the expansion of the Southwest Transitway and Algonquin College. The design was completed within 2.5 months in order to allow the City to commence construction in the summer of 2009. The project included the abandonment of the existing watermain, reconstruction of sewer crossings, feedermain connection details, detailed staging plans to minimize impacts to motorists, coordination with City departments for fast tracking the design, coordination with adjacent contracts and a permanent road widening in southbound Woodroffe Avenue lanes.