Principle 16
Principle 7
Direct rooftop runoff to pervious areas such as yards,
Parking codes should be revised to lower parking
open channels, or vegetated areas and avoid routing
requirements where mass transit is available or
rooftop runoff to the roadway and the storm-water
enforceable shared parking arrangements are made.
conveyance system.
Principle 8
Principle 17
Reduce the overall imperviousness associated with
Create a variable width, naturally vegetated buffer
parking lots by providing compact car spaces, minimiz-
system along all perennial streams that also encom-
ing stall dimensions, incorporating efficient parking
passes critical environmental features such as the 100-
lanes, and using pervious materials in the spillover
year floodplain, steep slopes and freshwater wetlands.
parking areas where possible.
Principle 18
Principle 9
The riparian stream buffer should be preserved or
Provide meaningful incentives to encourage structured
restored with native vegetation.  The buffer system
and shared parking to make it more economically
should be maintained through the plan review
delineation, construction, and post-development
stages of development.
Principle 10
Wherever possible, provide storm-water treatment for
Principle 19
parking lot runoff using bioretention areas, filter strips,
Clearing and grading of forests and native vegetation at
and/or other practices that can be integrated into
a site should be limited to the minimum amount
required landscaping areas and traffic islands.
needed to build lots, allow access, and provide fire
protection.  A fixed portion of any community open
Principle 11
space should be managed as protected green space in
Advocate open space design development incorporates
a consolidated manner.
smaller lot sizes to minimize total impervious area,
reduce total construction costs, conserve natural areas,
Principle 20
provide community recreational space, and promote
Conserve trees and other vegetation at each site by
watershed protection.
planting additional vegetation, clustering tree areas,
and promoting the use of native plants.  Wherever
Principle 12
practical, manage community open space, street rights-
Relax side yard setbacks and allow narrower frontages
of-way, parking lot islands, and other landscaped areas
to reduce total road length in the community and
to promote natural vegetation.
overall site imperviousness.  Relax front setback
requirements to minimize driveway lengths and
Principle 21
reduce overall lot imperviousness.
Incentives and flexibility in the form of density
compensation, buffer averaging, property tax reduc-
Principle 13
tion, storm-water credits, and by-right open space
Promote more flexible design standards for residential
development should be encouraged to promote
subdivision sidewalks.  Where practical, consider
conservation of stream buffers, forests, meadows, and
locating sidewalks on only one side of the street and
other areas of environmental value.  In addition, off-
provide common walkways linking pedestrian areas.
site mitigation consistent with locally adopted water-
shed plans should be encouraged.
Principle 14
Reduce overall lot imperviousness by promoting
Principle 22
alternative driveway surfaces and shared driveways that
New storm-water outfalls should not discharge
connect two or more homes together.
unmanaged storm water into jurisdictional wetlands,
sole-source aquifers, or sensitive areas.
Principle 15
Clearly specify how community open space will be
managed and designate a sustainable legal entity
responsible for managing both natural and recre-
ational open space.