West Knox Utility District Basins 1 – 6 Sanitary Sewer Rehabilitation

Our team developed and implemented a sanitary sewer inspection and rehabilitation program to address ongoing infiltration and inflow (I/I).

S&ME performed 2,609 manhole inspections and over 495,099 LF of smoke testing in a priority sanitary sewer basin. Services also included preconditioning and CCTV inspection of 495,099 LF of 8-inch to 24-inch pipeline. Inspection results were captured integrated back into the client’s geographic information system (GIS). After integration, the project team performed extensive analysis and evaluation of inspection results. The team then prioritized areas for rehabilitation based on the extent and severity of defects within pipelines and manholes. Rehabilitation projects included mainline cured-in-place-pipe (CIPP), service connection repairs, pipe bursting, mainline open-cut replacement, manhole lining, and partial lateral replacement.

The first rehabilitation project, started in 2012, consisting of 20,783 LF of 8” CIPP, 1,869 LF of 12” CIPP, 2,437 LF of 15” CIPP, 4,604 LF of 18” CIPP, 822 LF of 21” CIPP and 415 LF of 24” CIPP. This project also included 1,961 vertical feet of manhole lining and 547 LF of open cut replacement of 8” pipelines and 398 LF of pipe bursting 8” lines to 12”. The total construction cost was $2,796,689.

The second construction project began in early 2014 and consisted of 22,949 LF of 8” CIPP, 7,087 LF of 12” CIPP, 560 LF of 15” CIPP, 1,185 LF of 21” CIPP and 1,537 LF of 24” CIPP. This project also included 1,346 VF of manhole lining. The total construction cost was $3,102,227.

The final construction project was initiated in 2014, and consisted of 12,585 LF of 8” CIPP and 1,289 LF of 18” CIPP and 1,457 VF of manhole lining. S&ME prepared all contract documents, specifications and plans, and drawings and performed Construction Administration and Resident Project Representation for all of these projects. The results of these combined projects reduced the quantity of infiltration and inflow entering the collection system by 83%.


  • Preliminary Engineering
  • SSES Field Services
  • Engineering Design, CA/ RPR