Urban Subwatershed Restoration Manual 3: Urban Stormwater Retrofit Practices

Urban Stormwater Retrofit Practices (August 2007) is Manual 3 in the Urban Subwatershed Restoration Manual (USRM) Series. Developed by the Center for Watershed Protection, it focuses on
stormwater retrofit practices that can capture and
treat stormwater runoff before it is delivered to
the stream. The manual describes both off-site
storage and on-site retrofit techniques that can
be used to remove stormwater pollutants,
minimize channel erosion, and help restore
stream hydrology. Guidance on choosing the
best locations in a subwatershed for retrofitting
is provided in a series of 13 profile sheets. The
manual then presents a method to assess retrofit
potential at the subwatershed level, including
methods to conduct a retrofit inventory, assess
candidate sites, screen for priority projects, and
evaluate their expected cumulative benefit. The
manual concludes by offering tips on retrofit
design, permitting, construction, and
maintenance considerations.