INNOVATION May-June 2018

SUSPENSION CONVEYOR BRIDGE The project comprises the design and construction of a 302.4 metre span suspension bridge carrying an iron ore conveyor across a deep valley near Mariana, Brazil. The bridge is part of a 14 kilometre-long conveyor system that transports ore from the source mine to a nearby mine for further processing. The bridge consists of a slender steel deck supported vertically and transversally by spiral strand main cables and wind cables. The cable arrangement and construction method addressed the complex site topography and allowed VALE to meet environmental requirements and avoid tree removal, and to construct the bridge without accessing the valley below. COWI developed the bridge concept and completed wind engineering (with subconsultant RWDI Inc.), structural analysis and erection engineering, and detailed design of the deck and cable system. Owner: VALE S.A. COWI: Christopher Scollard, P.Eng., Fran ç ois Pepin, P.Eng., Tom Surtees, P.Eng., Mark Steunenberg, P.Eng., Serguei Kouznetsov, P.Eng., Ling Zhu, P.Eng., Zhigang Liu, P.Eng. LARGE LANDFILL CLOSURE PROJECT Sperling Hansen Associates is working with the City of Vancouver on the largest progressive closure project ever undertaken in BC, covering over 36 hectares at Vancouver Landfill in Delta. Due to the scale, construction is occurring over three years (2017–2019). Final grades are being established by the City’s operations staff using construction and demolition waste in advance of closure to achieve a natural, park-like setting. Unique features of this project include use of drones for survey control, recycled concrete to replace sand and gravel, white geomembrane that minimizes thermal contraction, and advanced condensate control with numerous strategically placed submersible wells and condensate sumps. Wetlands and stormwater ponds will retain runoff and achieve biodiversity. Owner: City of Vancouver (Lynn Belanger, P.Eng., Jerry Sobejko, P.Eng.). Prime engineering consultant: SHA (Dr. Tony Sperling, P.Eng., Cris Ciuperca, P.Eng.). LFG consultant: SCS Engineers (John Richards). R.F. Binnie: Adam Stubbs, EIT, Rebeka Brykajlo, EIT. P hoto : dronex uav photogrammetry

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