While the process of paving over underground repairs and refilling the feeder main line brought a collective sigh of relief in Calgary, critical water quality tests loomed as workers focused on the finish line in the dwindling days of June.

The more than three-week ordeal of repairing the nearly 50-year-old, 11 kilometre-long, two-metre diameter feeder main was a significant challenge for Calgary’s Water Services Director, Nancy Mackay, her team, and other municipal departments, not to mention the city’s 1.6 million residents.