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.
Phase 1: 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.
Phase 2: 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. The approximately 7,000 feet of pipe to be replaced has experienced 12 breaks since 1990, with 4 of those breaks occurring within the last 5 years.
Phase 1 Construction start: May 2018
Construction complete: July 2018
Construction start:January 2019
Phase 2 Construction complete (estimate): September 2019