The Public Works Department is responsible for the maintenance and upgrade of approximately 646 kilometres of roads and 190 bridges and culverts. The County has a fleet of equipment operating out of two main locations, Petrolia and Forest. Former Ministry of Transportation (MTO) patrol yards located at Oil City and Warwick are used mainly for winter operations.
The County owns, operates and manages six former lower tier municipal landfill sites in Brooke-Alvinston, Dawn-Euphemia, Lambton Shores, St. Clair and Sarnia. Additionally, the County contracts with two private landfills (Canadian Waste Services: Petrolia and Warwick) for additional disposal capacity in order to fulfill the County's mandate with respect to disposal of municipal solid waste.
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