The overall design goal for the LID subdivision was to use a cluster
layout to reduce overall site imperviousness and preserve open space.
In addition, stormwater infiltration was used wherever possible to
preserve the predevelopment hydrologic function of the site. A number
of waivers to the Waterford town subdivision regulations were required
for local approval of this project. Waivers needed to be obtained
for the following items:
| Reduced Road Width |
 Click to enlarge photo. |
The 28 foot minimum width requirement was
waived for both the traditional and LID subdivisions,
where road widths were reduced to 24 feet, and 20 feet,
respectively. The
reason for this change was to reduce the overall impervious
footprint of the LID subdivision.
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| Elimination of Curb and Gutter |
 Click to enlarge photo. |
The typical catch basins and concrete
pipe stormwater conveyance system was waived to allow
grassed swales in the LID subdivision. Grassed
swales encourage local infiltration and recharge of
groundwater. |
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| Alternative Pavement Surface |
 Click to enlarge photo. |
Ecostone® concrete block pavers
were used in place of traditional asphalt. Porous
surfaces provide for infiltration of stormwater runoff. |
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| One-way Cul-de-sac with Depressed Bioretention Island |
 Click to enlarge photo. |
The traditional paved 50 foot cul-de-sac was replaced
with a one-way cul-de-sac with a bioretention area
in the middle. The goals were to reduce the impervious
footprint, and provide infiltration for excess runoff.
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| Cluster Design |
 Click to enlarge photo.
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Houses were clustered together, which differs
from traditional subdivision design. The cluster design
allowed for different options in regards to lot lines
and setbacks. These options include:
Zero lot line setback: Homes
were put closer to property lines, so that other
parts of the subdivision could be preserved in open
space.
Reduced front setback: Homes
were put closer to the road, which created more
open land behind the house. A reduced front setback also reduced driveway length.
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| Shared Driveways |
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| Grassed Swales in the Town
Right-of-way |
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| Elimination of Sidewalk |
 Click to enlarge photo. |
Sidewalks were eliminated to reduce the
overall impervious footprint of the LID subdivision. |
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