Stormwater projects often grow from nuisance calls from residents, but the solutions typically reach beyond a couple of neighbors’ yards. Our approach to managing stormwater looks at the larger picture – not just the specific problem at hand. This helps us deliver quality design products that are constructible, maintainable, and budget conscious. We take our role to help our clients move their communities forward seriously by providing services that make lasting impacts to their investments.

We have experience retrofitting systems to fix an existing issue and designing new improvements to replace aging infrastructure. Our work reduces flooding, improves water quality, and boosts aesthetics. Partnering closely with municipalities, counties, and the United States Army Corps of Engineers, we help each entity protect their stakeholders by designing reliable solutions.


  • Preliminary stormwater engineering and concept studies
  • Hydrologic and hydraulic analysis and design – enclosed and open channel systems
  • Pipe rehabilitation and replacement
  • Floodplain analysis
  • Environmental Permitting
  • Detention/retention basin design
  • Capital improvement planning
  • Dam and levee design
  • Stormwater quality BMP’s
  • BMP inspections
  • Stream restoration

We have been very happy with both the speed and thoroughness of their work on projects ranging in scale and scope from quick plans for our public work crews to construct, to stormwater projects released for contracting through competitive bidding, to roadway repairs, and to Preliminary Engineering Studies. Their deliverables have always met or exceeded expectations, and their professionalism in dealing with any issue we encounter is crucial to the success of our projects. I look forward to continuing our relationship with Affinis.

Neil Meredith
PE, Project Manager, City of Olathe, Kansas