Tag: stormwater structures

A stormwater detention vault is an underground structure designed to manage excess stormwater runoff on a developed site, often in an urban setting. This type of best management practice may be selected when there is insufficient space on the site to infiltrate the runoff or build a surface facility such as a detention basin or retention basin.

Editor’s Comments: A Question of Responsibility

Editor’s Comments: A Question of Responsibility

Here’s the kind of situation we don’t like to think about but probably should. In October, a Pennsylvania family filed a lawsuit against Radnor Township because of injuries their son suffered after falling into a pool of water formed by an undersized stormwater culvert. I mentioned the lawsuit in a

Editor’s Comments: On the Front Lines

Just when we think we’ve got one problem solved, it can come back with a vengeance. In the US, most of us rarely worry about vector-borne diseases like malaria. But now the Zika virus—also spread by mosquitoes—is causing alarm throughout the Western Hemisphere; the World Health Organization a few weeks

Flood Warning Systems

Flood Warning Systems

Editor’s note: This article originally appeared in Stormwater Magazine in June 2009.

When it comes to addressing stormwater management problems and dealing with the permitting process of the National Pollutant Discharge Elimination System (NPDES), stormwater managers and hydrologists have more tools in the toolbox these days than ever before. Software programs can

Village of the Dammed?

Village of the Dammed?

William Mulholland, the man who oversaw construction of the Los Angeles Aqueduct, occupies a huge place in the history of water use in California—not all of it good. The aqueduct, completed in 1913, conveyed much-needed water to Los Angeles from Owens Valley, but it virtually ended agricultural production there and



Flooding can be caused by heavy rain falling for an unusually long time. It can be caused by an unusually large snowpack followed by a sudden thaw. It can be caused by unusually high tides, tsunamis, dam failures, deforestation, poor drainage, or a high proportion of impervious land, or by

Stormwater Good Housekeeping: Prevention Worth a Pound of Cure

Of the six minimum control measures required under National Pollutant Discharge Elimination System (NPDES) Phase II permits, one, pollution prevention and good housekeeping, is intended to ensure municipal operations aren’t themselves contributing to nonpoint-source pollution. In addition to ensuring city vehicles, buildings, and storage and disposal areas–such as those for

Protecting the Public – and Limiting Your Liability

It’s not enough that your stormwater infrastructure does the job it’s supposed to, or even that it’s well maintained. You also need to consider how it looks to those who have no interest at all in stormwater but great affinity for mischief and adventure–namely, young children–and anticipate how a pond,


“The most exciting phrase to hear in science, the one that heralds new discoveries, is not ‘Eureka!’ but ‘That’s funny’….” -Isaac Asimov.

We are in a time of transition from a pollution reduction approach to stormwater quality management to one of volume-reduction. The volume of runoff itself is the

Open Channelization of a Roadway Culvert System

Anthropogenic land-use changes to riparian wetlands in urban settings result in scale-specific animal responses (Mensing et al. 1998; Nerbonne and Vondracek 2001). This includes disturbances to natural streambeds and engineered stormwater structures (e.g., culverts and open channels) intended to divert or change water flow velocity with the construction of roadways

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