Sanitary Sewer Evaluation Study and Facility Plan
Bowling Green, MO
McClure engaged in a project with the City to develop a holistic approach to solving the excess extraneous water entering the sanitary collection system. Alongside the City Staff, McClure developed a phased approach to field investigations to identify the worst areas of extraneous water entering the system. The first step was to place seven strategic flow monitors throughout the City to monitor flow from the sanitary drainage basins for 13 weeks during spring and summer of 2019. In conjunction with this data, lift station data from the eight lift stations was compared to the observed flow monitoring data to develop hydrographs for each sanitary basin. The data collected was converted to a one-hour rain event for comparison across the board and then compared to rainfall data for the given flow rate observed in the sanitary collection system.
McClure created design year, or 10-year storm events, as the target to be able to handle in the sanitary collection system. Topside manhole inspections were performed as the second step in the first phase of field investigations for the City of Bowling Green. Defects in the manholes were recorded and categorized per drainage basin. Defects were correlated to gallons per minute entering the manhole. Lastly in the first phase, lift station evaluations were also performed as part of the overall sanitary sewer evaluation study. Undersized lift stations were noted along with aging infrastructure defects that resulted in identified rehabilitation projects for select lift stations in Bowling Green.
Following completion of the SSES, McClure developed a facility plan and anti-degradation study focused on evaluating the City’s existing Sequencing Batch Reactor (SBR) treatment facility. Analysis concluded that the facility's permitted flow could be increased from 850,000 gallons per day to 994,000 gallons per day without requiring major upgrades. However, the study did identify the need for targeted improvements, including repairs to a lift station and the reconstruction of the deteriorated headworks, to support long-term system reliability and compliance.
McClure created design year, or 10-year storm events, as the target to be able to handle in the sanitary collection system. Topside manhole inspections were performed as the second step in the first phase of field investigations for the City of Bowling Green. Defects in the manholes were recorded and categorized per drainage basin. Defects were correlated to gallons per minute entering the manhole. Lastly in the first phase, lift station evaluations were also performed as part of the overall sanitary sewer evaluation study. Undersized lift stations were noted along with aging infrastructure defects that resulted in identified rehabilitation projects for select lift stations in Bowling Green.
Following completion of the SSES, McClure developed a facility plan and anti-degradation study focused on evaluating the City’s existing Sequencing Batch Reactor (SBR) treatment facility. Analysis concluded that the facility's permitted flow could be increased from 850,000 gallons per day to 994,000 gallons per day without requiring major upgrades. However, the study did identify the need for targeted improvements, including repairs to a lift station and the reconstruction of the deteriorated headworks, to support long-term system reliability and compliance.
Highlights
- Installed and analyzed flow monitors across seven drainage basins to quantify inflow and infiltration (I/I) and develop basin-specific hydrographs
- Conducted manhole inspections and lift station evaluations to identify system defects, capacity limitations, and infrastructure rehabilitation needs
- Provided cost-per-gallon estimates of extraneous water removed, enabling data-driven prioritization of system repairs
- Developed a facility plan and anti-degradation study that increased the permitted flow of the SBR treatment facility from 850,000 to 994,000 gallons per day without major upgrades
- Identified and recommended critical improvements, including lift station repairs and reconstruction of the deteriorated headworks, to enhance long-term system performance
Discipline
Water
Project Type
Wastewater Treatment Plant
Client
City of Bowling Green, MO
