The skyline of the Darlington Nuclear Generating Station has been transformed by the arrival and operation of the Darlington SMR Crawler Crane 2026, the most powerful machine of its kind in Canada. This week, Ontario Power Generation (OPG) and project partner Sarens confirmed the successful completion of a “colossal” engineering feat: the lifting and placement of the nearly 2.1-million-pound Basemat foundation module. This massive steel-and-concrete structure now sits 35 metres below ground in the excavated reactor shaft, serving as the common foundation for the G7’s first-ever grid-scale Small Modular Reactor (SMR).
Engineering the “Big Beast”: The LR 12500-1.0
The Darlington SMR Crawler Crane 2026, a Liebherr LR 12500-1.0, is a marvel of modern heavy-lifting technology. Designed specifically for massive infrastructure projects, the crane’s capabilities include:
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Lifting Capacity: Up to 2,500 tons (5.5 million pounds), roughly equivalent to the weight of 525 adult elephants.
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Reach: A vertical reach of over 200 metres, comparable to the height of two stacked soccer fields or a 60-storey skyscraper.
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Site Prep: Because of the crane’s immense weight, the project team had to construct specialized pile-supported concrete foundations to provide a stable working platform.
The Basemat Milestone
The placement of the Basemat module is a critical path milestone for the Darlington SMR Crawler Crane 2026. With a diameter of 37 metres, the Basemat provides the integrated foundation for both the reactor building and the containment structure. By lowering this module into the 35-metre-deep shaft, crews have officially moved the project from the “excavation” phase to the “vertical construction” phase. This unit is the first of four planned SMRs at the site, which will eventually provide enough carbon-free electricity to power roughly 1.2 million homes.
Support Infrastructure and Licensing
Beyond the record-breaking lift, the Darlington SMR Crawler Crane 2026 project has seen several other infrastructure completions this spring:
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Storage Facilities: Two new warehouse facilities have been finalized, providing 1.5 soccer fields worth of laydown space for reactor components.
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Intake Shafts: Two specialized shafts have been excavated to support the deep-water intake system that will cool the SMR units.
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Regulatory Progress: In late March, OPG officially submitted its Licence to Operate application to the Canadian Nuclear Safety Commission (CNSC), a legal requirement that keeps the first unit on track for completion by the end of the decade.
Impact on Clarington and Durham
The Darlington SMR Crawler Crane 2026 is a visible symbol of Clarington’s role as a global hub for nuclear innovation. The project is expected to create over 2,000 jobs during the peak of construction and contribute billions to the provincial GDP. As the LR 12500-1.0 continues to hoist heavy components over the coming months, residents can expect to see the reactor building rise from the shaft, marking a new era for Ontario’s energy grid.
