The Work includes furnishing products, labor, tools, transportation, and services to: 1. Maintain water service and pressure to water system throughout construction. 2. Follow City-approved traffic control plans. Set up and maintain traffic control devices throughout potholing and construction. 3. Perform potholing operations to verify location of existing underground utilities and to measure outside diameter of existing large diameter pipelines (wherever tapping sleeves and couplings are proposed). 4. Protect in place existing utilities. 5. Excavate to expose existing pipelines, large valves, and small valves. Work will include exposing existing waterlines at linestop locations. 6. Construct linestop assemblies and anchor blocks. 7. Isolate segments of existing waterlines. a. Remove two existing 20-inch gate valves and replace with 20-inch butterfly valves, b. Remove and replace four small diameter gate valves, c. Remove approximately 40 lineal feet of 20-inch cast iron waterline and replace with 20-inch ductile iron waterline, d. Abandon approximately 147 lineal feet of 12-inch cast iron waterline, and replace with 12-inch ductile iron waterline, and e. Remove approximately 32 lineal feet of 6-inch cast iron waterline and replace with 6-inch ductile iron waterline.