Cleveland Utilities Basin 31-45 SSES & Rehabilitation
Our team developed a detailed plan to inspect, assess and rehabilitate a sanitary sewer basin for Cleveland, Tennessee. The basin was the source of significant infiltration and inflow (I/I). The sanitary sewer evaluation study (SSES) consisted of conducting field inspections. Services included smoke testing, manhole inspections and closed circuit television inspection of the pipelines to identify sources of I/I. The team also developed a preliminary engineering report outlining design alternatives for rehabilitating or replacement of existing manholes and pipelines.
S&ME professionals performed:
- 838 manhole inspections
- 181,000 LF of smoke testing within the sanitary sewer basin
- Preconditioning and CCTV inspection of 105,000 LF (8 to 12-inch) pipelines and 6,000 LF (12 to 18-inch) pipeline
- Inspection of 20,000 LF (21 to 24-inch) interceptor
- Integrated Sonar and CCTV (TISCIT) inspection of 6,800 LF (30 to 36-inch) interceptor
After integrating the results into the client’s geographic information system (GIS), the project team performed extensive analysis and evaluation. The team prioritized areas for rehabilitation based on the extent and severity of the defects within the pipelines and manholes. The team then developed corrective action plans to reduce I/I and eliminate chronic sanitary sewer overflows.
The field personnel completed all manhole inspections and smoke testing field inspections within 4 months of notice to proceed. By utilizing dye water flooding studies to determine specific sewer reaches within the basin, the client achieved significant cost savings. The rehabilitation project design was completed within 30 days of receiving approval from the client in preparing the design. Project bids were below the Engineer’s opinion of probable cost.
Highlights
- Preliminary Engineering
- SSES Field Services
- Engineering Design, CA/ RPR