This project involved the construction of a slipform concrete headframe for a gold mine shaft located in Red Lake, Ontario. The headframe structure measured approximately 30 feet by 40 feet at the base and soared to a height of 208 feet. The project presented significant environmental challenges due to extreme cold weather conditions, with construction taking place during winter months where temperatures regularly fell below freezing.

The main objectives were to safely and efficiently construct a durable, high-capacity headframe that would serve as a critical structural component for the mine shaft operations. The project required overcoming the challenges associated with winter concrete pours in subzero temperatures to ensure structural integrity and longevity while adhering to strict safety and quality standards.

To address the challenges of cold-weather construction, an innovative glycol heating system was designed and implemented to maintain optimal concrete curing temperatures during the slipforming process. This system ensured continuous heat application to the freshly poured concrete, preventing freeze damage and enabling steady progress despite harsh environmental conditions. The slipform technique allowed for a continuous, vertical pour, creating a monolithic, robust structure capable of withstanding operational stresses.

The headframe was successfully completed on schedule with no significant delays despite the adverse weather. The glycol heating system proved effective in maintaining concrete curing quality, ensuring the structural durability required for mining operations. The final structure met all design specifications and safety requirements, providing a reliable and long-lasting support for the gold mine shaft.