Prefabricated system enhances drainage and venting. In April 2009, the City of St. Albert opened the first phase of the Riel Recreation Park Redevelopment which included a new high-end artificial turf multipurpose field. Challenge The recreation park was formerly a dry waste landfill site from 1976 to 1986. A system was needed to allow for quick drainage under heavy rainfall conditions, while at the same time allowing for unobstructed v

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