Summary Major long-term water main replacements projects are in the works in Baltimore County, the Baltimore County Department of Public Works and Transportation (DPWT) told WBAL-TV 11 News on Wednesday. Major long-term water main replacements projects are in the works in Baltimore County, the Baltimore County Department of Public Works and Transportation (DPWT) told WBAL-TV 11 News on Wednesday. Gray Manor Water Main Replacement ProjectOne of the largest water infrastructure investments in the area will be the Gray Manor Water Main Replacement project. Fairgreen Road & Baybriar Road Water Main ReplacementThe Fairgreen Road and Baybriar Road water main replacement will replace 6,900 feet of water mains across Baybriar Road, Fairgreen Road, Meath Road and Louth Road. Cost: $340,000The county DPW handles the installment and capital projects for the water infrastructure, while the city DPW handles the upkeep and water main breaks.