Grand Trunk Rr is a superfund site located at Griswold & Michigan, Port Huron, MI 48060. The Environmental Protection Agency (EPA) identifies sites such as Grand Trunk Rr because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Grand Trunk Rr is currently registered as an Archived superfund site by the EPA and does not require any clean up action or further investigation at this time.