1970 – 1979

By the early ’70s, society was becoming environmentally conscious. We responded by retrofitting boilers with electrostatic precipitators which removed 99.5 per cent of the fly ash from emissions. While interest rates rose, we continued to expand to keep up with the needs of a growing province.

In 1970, Calgary Power commissioned the first coal-fired unit at the Sundance Generating Plant, with 286 megawatts of capacity. In 1972, the construction of the Bighorn Dam on the North Saskatchewan River was completed. Its reservoir was named Lake Abraham, after a long-time Aboriginal resident of the area, Silas Abraham.

Meanwhile, land reclamation at the company’s Whitewood Mine, near our Wabamun Plant, was well underway and setting a pattern for ongoing reclamation activities that continue to this day.

In 1974, Calgary Power acquired Lethbridge’s generating plant and the company’s Sundance plant expanded, with Units Four and Five coming online in 1977 and 1978.

Our Sundance plant, pictured here, first came on line in 1970. It is now our largest plant and can generate in excess of 2,000 MW.