“Someday a real rain will come and wash all
this scum off the streets.” That’s what
Travis Bickle, the Taxi Driver, said in the 1976 Martin Scorsese movie of the same
name. Bickle, played by Robert DeNiro, was referring to vigilante justice as
the rain and some of New York City’s shadiest characters as the scum that would
be washed away.
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| photo by the author |
But this post isn’t about violence or
criminals. It’s about the inanimate scum
that gets washed from streets, sidewalks, and everywhere by actual rain
storms. You can call it stormwater,
runoff, or the more technical “overland flow.”
But the effect is the same. Trash,
sediment, and chemicals get washed from the land’s surface into the nearest body of
surface water. Even in the absence of
trash and chemicals, many streams become degraded by sediment washing off of
sparsely vegetated areas and by stormwater that gets heated up by washing over
hot asphalt surfaces during summer thunderstorms (trout cannot tolerate warm water).
I read a post this weekend on the American
Rivers blog about some big strides that the city of Atlanta is taking to
make their stormwater infrastructure greener and thereby easing the effects of
urban runoff on the rivers and streams that receive their stormwater. Atlanta recently updated their stormwater
ordinances to encourage implementing green infrastructure, recognizing that,
“The use
of green infrastructure and runoff reduction practices improves water quality
in our streams and reduces the magnitude and frequency of flooding and combined
sewer overflow events through the infiltration, evapotranspiration, and reuse
of stormwater runoff…”
The City of Philadelphia has been proactive
with its stormwater management for a number of years. The Philadelphia Water Department is in charge of managing the stormwater runoff and has a
system in place to charge property owners based on the volume of stormwater
they discharge to the city’s storm sewer system. Philadelphia is approaching the runoff
problem the right way by getting property owners to pay for their stormwater
runoff in proportion to the volume they discharge. Therefore, a 30-year old big-box store surrounded by a
sea of asphalt does not get away with discharging their stormwater, untreated,
to the city stormwater system. They
pay. So they have an incentive
to treat as much of their stormwater on-site as they can.
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| Little Lehigh Creek. Sedimentation and elevated temperatures are the most significant stressors in this segment of this spring-fed stream (photo by the author). |
Ironically, many U.S. cities understand the big
picture of stormwater management better than some medium-sized municipalities
that still have delusions of being a semi-rural bedroom communities as opposed
to the suburban wastelands they are allowing themselves to become. With
increasing suburbanization and urbanization, the stormwater runoff problems
become more acute. EPA regulations
governing Municipal Separate Storm Sewer Systems (abbreviated as MS4) are
requiring municipalities to take responsibility for the stormwater that their
storm sewer systems discharge into surface water bodies. And here in Pennsylvania, our Department of
Environmental Protection’s newer stormwater regulations are requiring new
construction projects to manage their stormwater on site using either
old-fashioned, ugly retention basins or, preferably, naturalized stormwaterbasins, pervious pavement, or other green infrastructure.
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| photo credit: LowerMacungiePatch.com |
In my township, however, we still have voluminous
problems with the stormwater runoff from all of the recklessly approved new
construction from the early 1990s up through the middle of the last decade. We have serious, recurring flooding problems
because of the stormwater runoff entering the stream that runs the length of
our township – stormwater coming from a Walmart shopping center with inadequate
on-site stormwater management facilities, and stormwater coming from hundreds
upon hundreds of acres of warehouse facilities built in a neighboring township.
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| photo credit: LowerMacungiePatch.com |
I’m sure my local stormwater runoff problem is also happening in many other municipalities that have experienced unchecked
suburbanization in the past 20-30 years. This problem cannot be solved by simply requiring all future development to manage its stormwater on-site. It’s time to make all property owners pay for the burden of their
stormwater on the public. Stormwater
runoff should be managed by a municipal authority in the same manner that
sanitary sewer services are managed.
Pennsylvania’s municipal code allows for creation of a municipal
authority to manage a utility, and stormwater management is a utility that has
been ignored for too long in many areas.
Unlike sanitary sewer service, which can be apportioned based on
political subdivision boundaries, however, stormwater management authorities
would function more practically if they are based on watershed boundaries. All dischargers should pay their fair share to manage their runoff so that it does not exacerbate flooding or impair water quality in the receiving streams.
There should be no free lunch when it comes to
discharging large volumes of stormwater that can cause localized flooding and seriously impair high-quality
streams.
