CBM Aggregates (Sunderland Pit)
CBM (Canada Building Materials), a division of St. Marys Cement, operates the Sunderland Pit as a sand and gravel quarry in Brock Township. The pit supplies stone and sand to the Greater Toronto Area east market, with materials including asphalt stone, concrete stone, Granular A and B, limestone screenings and crusher run, round stone, pit run and a full range of sands such as concrete sand, sand fill, brick sand and cable sand. A Durham Region planning report confirms the licensed pit operation sits on Regional Road 13 in the Township of Brock and has operated for decades.
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