Ledcor was contracted to build a wastewater treatment plant and cofferdam in Fort Hills. For the plant, we installed 469 12-inch H-piles. To achieve the required length for the piles, Ledcor’s welders spliced approximately 50 percent of them.

The cofferdam design involved multiple sheet pile cells, which required 28,000 m³ (989,000 ft³) of excavation and 33,000 m³ (1.2 million ft³) of concrete placement. Ledcor’s scope also included 16,000 lineal meters of pre-drilling, which assisted in the advancement of the sheet piles into Fort McMurray’s geological terrain.  

Equipment Used:

• 1 165- ton crawler crane
• 1 150-ton crawler crane
• 2 110-ton crawler cranes
• 1 RT 65 crane
• 1 APE 200
• ICE Vibro hammers
• 2 SR30 Soilmec drills for pre-drilling the land-based cells
• 1 Watson crane mounted drill for the cells that required pre-drilling from the work bridge
• 1 Komatsu PC400 excavator
• 1 45-ton longstick excavator
• Medium-sized loaders
• Komatsu HM400 articulated trucks