The Antrim Township Board of Supervisors finds that:
A. Inadequate management of accelerated stormwater runoff
resulting from development throughout a watershed increases flood flows and
velocities, contributes to erosion and sedimentation, overtaxes the carrying
capacity of existing streams and storm sewers, greatly increases the cost
of public facilities to convey and manage stormwater, undermines floodplain
management and flood reduction efforts in upstream and downstream communities,
reduces groundwater recharge, and threatens public health and safety.
B. A comprehensive program of stormwater management, including
reasonable regulation of development and activities causing accelerated erosion,
is fundamental to the public health, safety, welfare and the protection of
the people of the municipality and all the people of the commonwealth, their
resources, and the environment.
The purpose of this chapter is to promote the public health, safety
and welfare by minimizing damages described in the previous section of this
chapter through provisions designed to:
A. Manage accelerated runoff and erosion and sedimentation
problems at their source by regulating activities that cause such problems.
B. Utilize and preserve the existing natural drainage systems.
C. Encourage recharge of groundwater where appropriate and
prevent degradation of groundwater quality.
D. Maintain existing flows and quality of streams and watercourses
in Antrim Township and the existing regional watersheds.
E. Preserve the flood-carrying capacity of streams.
F. Provide proper maintenance of all permanent stormwater
management facilities that are constructed in Antrim Township and existing
regional watersheds.
G. Provide performance standards and design criteria for
stormwater management and planning within Antrim Township and the existing
regional watersheds.
The following activities are defined as "regulated activities" and shall
be regulated by this chapter:
C. Construction of new or additional impervious or semipervious
surfaces (driveways, parking lots, etc.)
D. Construction of new buildings or additions to existing
buildings.
E. Diversion or piping of any natural or man-made stream
channel.
F. Installation of stormwater management facilities or appurtenances
thereto.
G. Any activity requiring that a land development or subdivision
plan (as defined in Chapter
125) be filed as required by Chapter
125.