Sewer tunnels in Cobb and Gwinnett counties are among $91.5 million in water and sewer projects statewide that the Georgia Environmental Facilities Authority approved at its board meeting Tuesday. Of the 11 projects, five are at least partially backed by $40.5 million in federal stimulus money. Gov. Sonny Perdue's office said late Tuesday. The 11 projects are to help pay for water and sewer infrastructure projects in Cobb and Gwinnett counties as well as Colquitt County. Cities receiving the money are Camilla, Hiawassee, Port Wentworth, Portal, Sparta, Stillmore, Valdosta and West Point.