UFC 3-210-10
25 October 2004
10-1.4
LID DESIGN. Four types of LID components were selected: bioretention,
permeable pavers, tree box filters, and a vegetated roof. Because of the poor infiltration
capacity of the soil, these features will not be capable of infiltrating stormwater into the
ground. Instead, they will be equipped with underdrains and used to control water
quality and provide detention storage. Site drainage areas were delineated, and LID
features were located in places both appropriate to the technology and to the runoff
patterns and volumes. Figure 10-3 shows the site drainage patterns and Figure 10-4
shows the locations of the LID features.
Figure 10-3 Drainage Areas of Proposed Practices
The description of the practices and their locations is as follows:
Drainage Areas One through Three: Several LID components will be
installed in the large vegetated island behind the parking areas along the
access road. The design includes three bioretention cells, a bioretention
swale, and a footpath constructed using permeable pavers. Installation
will require that the existing curb be removed and replaced with wheel
stops. These LID components can then treat the sheet flow from the
access road and adjacent parking area and the parking lot to the south. A
slight regrading of the drive area around the access road to the building
will be required in order to direct runoff from the parking lot to the
bioretention cells.
Drainage Area Four: A tree box filter is designated for this area. This
structure is appropriate because of space limitations.
Drainage Area Five: Permeable pavers will be constructed in the existing
valley between the access road and the parking area. This will require
reconstruction of the inlet tops and some regrading. The curb in the back
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