Challenges
• Exact line and grade required three gravity flow sewers:
• 90 m, 315mm, -1.0% (1, 90m drive)
• 120 m, 315mm, +1.4% (1, 120m drive)
• 300 m, 225mm, +1.0% (3, 100m drives)
• Open-cut excavation was not a viable or safe option
• Existing water, sewer, drainage, communication and electricity underground infrastructure at different depths up to 6.5 m (21-ft.)
• Owner required continued 24/7 traffic during construction
• New road constructed near the excavation route
• Collaboration with all municipalities
Outcome
• Accurately executed sewer installations
• Minimal construction disturbance to traffic and businesses
• Safer construction zone
• Camera slope check verified accuracy on all three bores