To replace 1946-54 era 12-inch cast iron pipe that is subject to high break frequency and/or high risk for damages from breaks.
Replace about 3,200 feet of aging 12-inch cast iron pipe in 35th Street between Federal Avenue and Lombard Avenue with new 12-inch diameter earthquake resistant ductile iron pipe and replace about 3,800 feet of aging 3-inch & 6-inch diameter cast iron pipe water main in Rainier Avenue between 19th and 23rd streets with 1,900 linear feet of new 8-inch diameter ductile iron pipe.
The 3-inch main is located on the west side, while the 6-inch main is located along the east side of Rainier Avenue. Those will be abandoned in-place. The approximately 7,000 feet of pipe to be replaced has experienced 12 breaks since 1990, with four of those breaks occurring within the last five years.
Construction start (tentative): May 2018
Construction complete (tentative): September 2018