Sanitary Sewer Infiltration and Inflow (I&I) – Villages of Fox Point and Bayside

Municipal | Wisconsin | Back


The villages of Fox Point and Bayside experience some of the most I&I in the Milwaukee Metropolitan Sewerage District (MMSD) service area. Defects in pipes, joints, manholes, and unauthorized connections from sump pumps or downspouts to the sanitary system contribute to sanitary sewer flows.


Kapur provided planning, engineering design, bidding, and construction support services to investigate the I&I challenges in these communities. Investigation included door-to-door inspection, smoke testing, dye testing, televising, and review of sewers, as well as research of as-builts, system maps, and construction observation notes. Data from these investigations was compiled into a report with specific recommendations for rehabilitation, such as cured-in-place pipe (CIPP) lining, joint sealing, manhole rehabilitation, and spot repairs.

In most cases, Kapur recommended trenchless technologies for the installation of rehabilitation of sewers. This technology for improving underground infrastructure is a more efficient and cost-effective method than open-cut excavation and is used to rehabilitate sewer mains and laterals, manholes, water main and water laterals, storm sewer pipes, and large interceptor sewers.

Investigations were followed by comprehensive engineering and construction services performed by Kapur staff. Both design and construction were performed in strict compliance with the Pipeline and Manhole Assessment and Certification Program established by the National Association of Sewer Service Companies (NASSCO).

Services Provided

  • Flow monitoring
  • Manhole inspections
  • Smoke testing
  • Dye water testing
  • Sanitary main internal closed-circuit television inspection
  • House to house inspections
  • Sanitary sewer lateral televising

Industries Covered



Based on Kapur’s investigations, the Villages of Fox Point and Bayside have rehabilitated over 15 miles of deteriorated sanitary sewer. These investigation and rehabilitation programs significantly reduced overall system flows as well as peak flows during rain events, which decreased wastewater treatment costs. In addition, these programs lowered the risk of basement backups that can be costly and distressing for property owners.

We have a 15-year history of successfully reducing inflow and infiltration for communities. We have improved more than 100,000 feet of sanitary sewer main, 50,000 feet of sanitary sewer laterals, and over 250 sanitary manholes in various basins.