Page 91 THE GLOB AL LEADER IN COVER SOLUTIONS Dry Bulk Storage Solutions • All-aluminum clear -span structures • High strength-to-weight ratio • Maintenance free - never rusts, rots, chips or solar degrades Superior Construction & Service • Economical installation - light weight translates to faster construction times and reduced construction costs • Project support around the world SINCE 1964 · OVER 16,000 INST ALLED · OVER 90 COUNTRIES w w w .cstcovers.com Source: Detour Gold Corporation, Photography by Graeme Oxby . ©2013 CST Industries, Inc. 715647 County Road #4 Innerkip, ON NOJ 1MO info@greatario.com www .Greatario.com T el: 519-469-8169 GREA T ARI O Engineered Storage System s Page 90 By Gregory Reynolds The challenge was immense, build a covered dome under time constraints in the Northern Ontario wilderness 185 km northeast of the T own of Co - chrane. The clie nt was Detour Gold Corpora - tion and the storage dome was to be a key part of the $1.5 billion Detour Lake Gold Mine. Greatario Engineered Storage Sys - tems, based in Innerkip Ontario, has been designing and building storage systems for municipal and industrial markets since 1986. Leading edge technology , engineering support and sound construction methods, along with innovative designs and expertise, have allowed Greatario to become one of the lar gest feld erected tank builders in Canada. It knew it could do the Detour Lake Project but frst it had to win the con - tract. Detour Gold continually strives to go above and beyond the existing health and safety and environmental stan - dards of the mining industry . Con - structing a covered structure for its operation to house a conveyor needed to be done in a safe, environmentally responsible, timely and cost ef fective manner . The company’ s requests were threefold: frst, to ensure worker safe - ty by minimizing the amount of dust created by the stockpile; second, to minimize the release of dust into the environment and third, to manage the amount of material awaiting transport to the mine’ s ore processing facility . In early 201 1, Greatario Engineered Storage Systems president Scott Burn responded to a bid request by Detour Gold for its stockpile containment solution. As part of the bid process, Burn met with BBA ’ s structural en - gineers, Detour Gold’ s engineering team, AMEC, Greatario and CST Covers met to discuss the specifca - tions of the bid. By partnering with its parent compa - ny , CST Covers, Greatario was able to of fer a customized ‘turnkey’ contain - ment solution for the mine. Following review of the proposal and site visits to other CST bulk storage domes, Detour Gold felt confdent that Greatario could handle the proj - ect. Greatario assumed the role of general contractor and installer of the dome with CST Covers providing engineer - ing, and manufacturing and supply of the dome. Construction began in July 2012. Burn and construction manager Ken Connell met with AMEC project manager , BBA structural engineers, and a CST consultant to determine fnal construction methods and time frames. “Detour Gold had a very specifc timeline for us to complete our por - tion of their project,” Connell recalls. A typica l design-build would be ‘tow - er build technology’ in which a tower is built 150 feet high and the dome is built from the inside-out, in which in - ner frames and poles are constructed and raised by a pole crane. However , as the existing conveyor eliminated the opportunity to use the tower build technology , an outside-in cover construction method was used. The outside frames and panels were constructed on the walls of the struc - ture. The frames and panels were then con - structed inward until the dome was complete. Man lifts and cranes were used as the dome rings were com - pleted. The construction team built one complete ring at a time and then moved up to the next ring. A total of 25 rings were assembled. In total, 3,363 beams were construct - ed to slide into aluminum gussets to form the structure. Greatario’ s con - struction team built the dome as de - liveries from CST Covers arrived on site. As the prefabricated beams slid easily into aluminum gussets and held securely , the assembly process re - quired no welding of the dome itself. This was a huge advantage. This precise assembly process al - lowed the construction team to assem - ble the dome during dif ferent weather conditions. The fnished frame was then cla d with aluminum sheets. Over 2,240 sheets were installed. In November , the stockpile contain - ment structure was completed . It is a dome 97.5m in diameter and 52m in height – the lar gest dome that Grea - tario has built and the lar gest alumi - num geodesic dome in Canada. The dome is designed to withstand snow loads and wind speeds typical for the Far North. Material is trans - ported from the dome to the mine’ s ore processing plant via an existing under ground tunnel. Burn is very proud of the success - ful design-buil d project his team has completed. “It is by far the lar gest dome we have built. While we had our challenges along the way , we were able to devel - op solutions and move forward. The workmanship and ambition put forth by our team of project manag ers, con - sultants and building crew is obvi - ous when you look at the completed dome. It is impressive.” Challenge of building storage dome at Detour Lake met by Greatario THE GLOB AL LEADER IN COVER SOLUTIONS Dry Bulk Storage Solutions • All-aluminum clear -span structures • High strength-to-weight ratio • Maintenance free - never rusts, rots, chips or solar degrades Superior Construction & Service • Economical installation - light weight translates to faster construction times and reduced construction costs • Project support around the world SINCE 1964 · OVER 16,000 INST ALLED · OVER 90 COUNTRIES w w w .cstcovers.com Source: Detour Gold Corporation, Photography by Graeme Oxby . ©2013 CST Industries, Inc. 715647 County Road #4 Innerkip, ON NOJ 1MO info@greatario.com www .Greatario.com T el: 519-469-8169 GREA T ARI O Engineered Storage System s