Page 15 - TN Public Works May-June Vol. 32 No.1
P. 15
Johnson Street in Chattanooga sometimes detrimental, manner. By doing bays and other devices to up the ante in
is a progressive collaboration so, the pond eked out some pollution re- the urban pollution removal business.
between the public and private duction. It acted as a sump to collect sedi- While grey infrastructure has slowly
sectors, where a new urban ment and pollutants for nutrient uptake evolved to become less grey, green infra-
development is improving
Chattanooga’s stormwater or later removal. It slowed the velocity structure takes it a step beyond. Whereas
and flood management. City of runoff and at least over the last fifteen grey infrastructure was about simple
hardscapes don’t have to be years, better designed water quality ponds conveyance of stormwater from separate
part of the problem; they can and swales incorporated some plant life, sources to a centralized pond, green infra-
be part of the solution. extended detention, filtration berms, fore- structure proposes collecting and treating
urban runoff “where it lands.” It’s decen-
Water Quality Lab Design tralized. It incorporates infiltration and
reuse. Erosive velocities aren’t designed into
The design of the water quality lab design calls for a green the equation because long runs of pipe are
roof and a rainwater-harvesting tank. The tank will serve as avoided in favor of pocket treatment prac-
a source of irrigation for the green roof in times of little or no tices dispersed throughout a development.
Thanks to public input, guidance
rain. Municipal water will also be supplemented as necessary. from business owners, assistance from
This lab is designed to maximize the stay on volume (SOV) and partner agencies, staff’s hard work and
increase the quality of water that might leave the site. The some very descriptive and user friendly
water quality lab is design manuals and guidance documents
scheduled for prepared by ARCADIS with assistance
completion from Andropogon Associates and Meliora
Design, the city is now prepared to pro-
in house pose green infrastructure programs and
in the next design tools to Administrative Staff and
six months. City Council in plenty of time to meet the
State’s implementation deadlines.
A green roof already
exists on the City Reprinted with permission from The Voice,
Council building. a publication of the American Council of
Engineering Companies of TN.
TPW May/June 2014 15
is a progressive collaboration so, the pond eked out some pollution re- the urban pollution removal business.
between the public and private duction. It acted as a sump to collect sedi- While grey infrastructure has slowly
sectors, where a new urban ment and pollutants for nutrient uptake evolved to become less grey, green infra-
development is improving
Chattanooga’s stormwater or later removal. It slowed the velocity structure takes it a step beyond. Whereas
and flood management. City of runoff and at least over the last fifteen grey infrastructure was about simple
hardscapes don’t have to be years, better designed water quality ponds conveyance of stormwater from separate
part of the problem; they can and swales incorporated some plant life, sources to a centralized pond, green infra-
be part of the solution. extended detention, filtration berms, fore- structure proposes collecting and treating
urban runoff “where it lands.” It’s decen-
Water Quality Lab Design tralized. It incorporates infiltration and
reuse. Erosive velocities aren’t designed into
The design of the water quality lab design calls for a green the equation because long runs of pipe are
roof and a rainwater-harvesting tank. The tank will serve as avoided in favor of pocket treatment prac-
a source of irrigation for the green roof in times of little or no tices dispersed throughout a development.
Thanks to public input, guidance
rain. Municipal water will also be supplemented as necessary. from business owners, assistance from
This lab is designed to maximize the stay on volume (SOV) and partner agencies, staff’s hard work and
increase the quality of water that might leave the site. The some very descriptive and user friendly
water quality lab is design manuals and guidance documents
scheduled for prepared by ARCADIS with assistance
completion from Andropogon Associates and Meliora
Design, the city is now prepared to pro-
in house pose green infrastructure programs and
in the next design tools to Administrative Staff and
six months. City Council in plenty of time to meet the
State’s implementation deadlines.
A green roof already
exists on the City Reprinted with permission from The Voice,
Council building. a publication of the American Council of
Engineering Companies of TN.
TPW May/June 2014 15
