From the Center for Watershed Protection in Ellicott City, Maryland:
The Center has released the Latest Manual in the Urban Subwatershed Restoration Manual Series.
Until now, no definitive guidance has been available on the
art and science of urban retrofitting. The Center for Watershed Protection's new manual reflects over two
decades of Center experience in retrofitting more than 25 urban watersheds
across the country.
As a country, we have degraded many
of our small urban watersheds. Nearly 80% of them were developed without
effective stormwater practices. The key to restoring these watersheds lies in
the practice of stormwater retrofitting,
which involves subwatershed detective work, storm drain forensics and
imaginative design.
This manual outlines the basics of retrofits, describes the 13 unique locations where they can be found, and presents rapid methods to find, design and deliver retrofits to meet a wide range of subwatershed objectives.
The concepts of retrofitting are illustrated in more than 75
figures, 150 photos, 60 tables and nine appendices. The manual contains
- updated costs for retrofit practices,
- updated pollutant removal data for stormwater treatment options,
- a design point method to estimate individual retrofit removal rates, and
- practical tips to support the design, permitting and construction of retrofit projects.
In short, the manual provides all the resources needed to develop an effective local retrofit
program. This 400+ page guidance is
available as a free download on the Center website. A hard copy of this manual will soon be
made available.
Download Manual 3: Urban Stormwater Retrofit Practices