Location: Lawrence, Indiana
Client: City of Lawrence
Services Provided: Environmental Engineering and Sanitary Sewer
A city-wide sanitary sewer evaluation study (SSES) is being conducted to address wet weather capacity issues. Lawrence’s collection system contains over 800,000 feet of sewer. As part of the ongoing SSES, over 150 miles of sanitary collection system is being evaluated, including the flow monitoring inspections; smoke testing; and sewer cleaning, televising, and dyed water testing services. The SSES included flow monitoring and analysis of 54 basins to determine the areas that have the highest rain derived inflow and infiltration. The fieldwork is nearly complete and the team is now working on evaluation of the filed data, creation of a sewer system model, evaluation of hydraulic capacity issues, determination of rehabilitation or replacement options to correct issues and development of a 20-year master plan. Preparation of a sanitary sewer overflow response plan and CMON has also been completed. The study also includes review of operation and maintenance records for 23 pump stations located throughout the city in order to develop a plan to eliminate SSOs and provide a comprehensive capital improvement plan for the sanitary collection system.