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Calgary's Green Line storage barn will be so big it may need federal environmental assessment

Calgary already has several storage facilities for its light rail cars, but the soon-to-be-built Green Line maintenance and storage yard is the first to draw federal interest.

The Canadian Environmental Assessment Agency is taking comments from the public and Indigenous groups to decide whether or not an environmental assessment is required for the facility.

It's weighing an assessment because of the proposed facility's size — 17.5 kilometres of track for heavy and light duty maintenance bays. It will cover a 226,700-square-metre area, approximately double the size of Southcentre Mall.