SCH Number 2021040469
- Interceptor Force Trunk Main Rehabilitation Project
- The City of Mountain View is proposing a project to rehabilitate a 42-inch interceptor force trunk main that is the City's major sewer discharge line to the Palo Alto Regional Water Quality Control Plant (PARWQCP) and serves as a critical link in the City's sewer collection system. Upon routine inspection in December 2014, the interceptor trunk main leaving the sewer pump station (SPS) was found severely deteriorated. Emergency repairs were made at the time to the most critically affected section of trunk main, an approximately 50 linear foot section immediately downstream of the SPS which was repaired with a 36-inch Vylon liner. Further inspection of the entire interceptor trunk main was completed in September 2015. The results revealed 600 feet of the trunk main interior, downstream of the flanged outlet manhole is severely degraded, characterized by exposed and corroding reinforcing steel. The currently proposed project will repair (through rehabilitation or replacement) approximately 1,083 linear feet of the interceptor trunk main between manhole 3 (#B3-022) and the end of the Vylon liner. The project also includes the installation of an additional manhole, manhole 4 (MH4), and rehabilitation of the flanged manhole outlet (#B4-030).
2 documents in project