About Wet Weather Flow and Urban Stormwater

Green + Gray

The trends of a booming urban populations, a declining number of porous surfaces, increased major wet weather events, and antiquated infrastructure have resulted in stormwater runoff often overburdening many city’s sewer systems. At stake is not just compliance with increasingly stringent regulations, but also the quality of a community’s drinking water, an increase in costly flood damage for residents and business owners, and the degradation of the very lakes, rivers, and streams from which our water supply is often sourced.

We believe the best time to manage stormwater is before it enters separate or combined sewer systems. Redesigning the urban environment to better handle wet weather is more sustainable, less expensive, and easier to manage in the long term. That's why we focus on first understanding what a community's existing system can handle, how it can be optimized, what users can afford, and where money is best spent.

But with larger storms and more urbanization comes increased flows that bring with them significant flooding and pollution concerns that must be proactively addressed. This is where our experience managing and delivering some of the world’s largest stormwater management programs and projects lets us find the best solution for each situation – whether that’s a local bio-swale or miles of storage tunnels.

Our expertise:

  • Capacity, Management, Operations, and Maintenance (CMOM)
  • Combined Sewer Overflows (CSO)
  • Detention & Retention Basins & Tanks
  • Green Infrastructure & Low Impact Development (LID)
  • Infiltration & Inflow Reduction
  • Sewer Inspection and/or Evaluation Surveys (SSES)
  • Separate Sewer Overflows (SSO)
  • Stormwater Management & MS4 Services
  • Urban Flooding Risk Reduction
  • Wet Weather Flow Treatment


Lexington Wet Weather and SSO Elimination Program

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