Typically, water mains at the end of their life span, like Eastern Parkway, are replaced. This involves large, open construction pits along the entire route of the main, removing the old cast iron main and replacing with new material. Since this main runs along a historic, heavily traveled road, we knew this wasn't an option. Our alternative approach involves rehabilitating and/or replacing 6.6 miles of the pipe by inserting a new 42-inch diameter steel pipeline inside the existing 48-inch main. This approach is known as slip lining. We'll still dig trenches to install the new pipe and in some cases we'll have to remove some of the old pipe, but this approach minimizes traffic detours and preserves the beauty of Eastern Parkway. And best of all, customers won't lose water as we make repairs!
Watch a drone video of the slip lining process, courtesy of Garney Construction.