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Over the last 20 years of site-civil design, it has been interesting to see stormwater trends come and go.  Some design methodologies have disappeared, only to return later or in a nearby geography as the “new” approach.  Agency directives can shift based on new leadership or the prevalent regional concerns at the time.  As the construction

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Months of design, pages of specifications, and tens or even hundreds of thousands of dollars may go into the design of a single bioswale, filtration basin, or other stormwater treatment system. So why do we spend so little time thinking about the flow control devices that make them work? This article is part one of a two-part series on bypass

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Oh stormwater treatment performance lab testing, your time-consuming, methodical steps make me want to pull my hair out. You often leave me with more questions than answers. However, the benefits often counterbalance the challenges. Thank you for answering my questions, even if I must endure the tedious steps of the scientific method; a method that

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I had an interesting sequence of thoughts after watching my 12-year old daughter chat with a friend on her cell phone about a music video they were simultaneously streaming on their laptops.  It’s easy to marvel at a kid’s fluidity with technology that didn’t exist when they were born, but I realized that I, too, experienced this rapid adoption of

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Read Part 1: Frustration is a Two-Way Street The initial wave of manufactured treatment devices (MTDs) were generally simpler than options available today.  With few exceptions, early MTDs were comprised predominantly of swirl/vortex and other types of gravity separators that targeted solids and floating pollutants.  State and local stormwater

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Having spent the last sixteen years immersed in the world of stormwater best management practices (BMPs), with particular emphasis on manufactured treatment devices (MTDs), I’ve repeatedly borne witness to the frustrations, misperceptions, and concerns raised by all walks of stormwater professionals relative to MTDs.  They’re too complicated, you

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This month’s blog post comes from Janice Kaspersen, editor of Stormwater magazine. Did you drive to work this morning? Was a parking space waiting for you when you arrived? Many cities require developers to provide a minimum number of parking spaces for office, retail, and residential buildings; sometimes the number is based on the square footage

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Given the number of conversations I’ve had in recent months with other stormwater professionals that don’t entirely understand the value of incorporating the sediment mass load capacity of a filtration BMP into the design process, I feel it’s time to revisit the subject.  We tend to think about BMP design in terms of treatment capacity which is

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There are several factors to consider when selecting the most appropriate stormwater filtration solution for a specific site.  Several of these factors easily come to mind, such as: state or jurisdiction regulations, hydraulic grade line limitations, footprint constraints, and other site restrictions.  One variable that is often overlooked when

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Why we need risers?If you’ve ever walked down a city street and stepped over a manhole with the label “STORMWATER” nestled in the pavement, chances are you’ve skimmed the surface of a detention system. If you were to lift up that manhole lid and peer down into its’ depths, you might be surprised to find a whole underground network of pipes and

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