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Inflow & Infiltration

Since 1972, we have provided hands-on technical expertise for municipal inflow/infiltration (I/I) studies, sewer system evaluation studies (SSES), and the design of cost-effective sewer rehabilitation programs for more than 50 municipalities. Whether achieving municipal compliance with regulatory requirements or proactively implementing local initiatives, designed to reduce pumping and treatment costs, sanitary sewer overflows and basement backups, our experience assisting municipalities with sewer rehabilitation programs is unmatched.

Our in-house investigative capabilities include flow monitoring and data analysis, manhole inspections, smoke testing, dyed water flood testing, sewer televising video analysis, and building inspections. We have multiple staff members that are certified through the National Association of Sewer Service Companies (NASSCO). Our sophisticated data processing capabilities allow inspection data to be seamlessly integrated into Geographic Information System (GIS) platforms, which can provide powerful information management for community staff members responsible for utility system operations and maintenance. We have been a pioneer in the evaluation and use of innovative trenchless technologies to rehabilitate structurally deficient sewers, manholes, and lift station components contributing I/I to sanitary sewer systems. While traditional excavation and replacement techniques remain in our design toolbox, the cost-effectiveness and efficiencies of trenchless technologies have proven advantages.

Key Services

  • Sewer System Evaluation Studies (SSES)

  • Flow Monitoring

  • Manhole Inspections

  • Smoke Testing

  • Dyed Water Flood Testing

  • Sewer Televising

  • Internal and External Property Inspections

  • Sewer System Modeling

  • Cost-Effectiveness Analysis

  • Mainline, Manhole, and Lateral Sewer Rehabilitation Design and Construction

  • Emergency Response Projects

  • Annual Operation and Maintenance Programs

  • Private Sector Programs

  • Regulatory Compliance

  • GIS Database Management

  • GPS Locating

  • New Product Evaluation