UFC 3-210-10
25 October 2004
structures, such as permeable paving systems with underdrains, may require more
specialized maintenance.
7-5
OPERATION AND MAINTENANCE. Regular inspections of conventional
stormwater management facilities are required to ensure that the storage volume has
not been reduced by sediment, outlets are not clogged by debris, and structural features
maintain their integrity. For a site designed using an LID approach, runoff management
features will tend to be higher in number and several types of features (e.g., bioretention
areas) need to be maintained by the property owner. The maintenance of these LID
features is straightforward and can easily be performed as part of regular landscaping.
Other LID features typically employed along public streets (such as tree filters) require
more specialized maintenance to ensure that the filter media are not clogged and toxic
materials such as heavy metals do not accumulate to a level at which they become a
health hazard.
7-6
RETROFIT POTENTIAL. Retrofitting an already developed area with a
conventional stormwater management system requires a considerable amount of space
and is likely to involve extensive site disturbance. The LID micro-scale systems listed in
the previous chapter require less site disturbance for each installment. LID retrofits may
be much easier than conventional retrofits on sites where intensive development has
already occurred. Locating sites for installing small devices is far easier than finding a
large site for a stormwater management facility. LID retrofits can be customized to
pollutant loads, allowing more complete control over pollutant removal.
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