[HISTORY: Adopted by the Borough Council of the Borough of
Collingdale 7-1-1991 by Ord. No. 585 (Ch. 9, Part 2, of the 1987 Code of
Ordinances). Amendments noted where applicable.]
In the interest of the public health, safety and welfare, the
provisions of this chapter are intended:
A.
To minimize runoff and soil erosion which is caused by inappropriate
development of steep slope land areas.
B.
To protect the Borough of Collingdale from development of steep slopes
of land which may cause a subsequent expenditure for public works
and disaster relief which affects the economic well-being of the Borough
and its residents.
C.
To protect residents from property damage and personal injury due
to runoff and erosion and landslides attributable to nearby development
on steeply sloping land.
D.
To relate the intensity of development to the steepness of terrain
in order to minimize grading, the removal of vegetation, runoff and
erosion and to help ensure the utilization of land in accordance with
its natural capabilities to support development.
E.
To restrict sedimentation and the alteration of natural drainage
patterns which may aggravate flooding both in the immediate area and
in downstream areas.
The requirements of all zoning districts shall be modified in
accordance with the provisions of this chapter on all land having
a slope of 10% or more as delineated on a plan which meets the requirements
of a preliminary plan as specified in the Delaware County Subdivision
and Land Development Ordinance.
As used in this chapter, the following terms shall have the
meanings indicated:
The slope of land determined according to the formula:
|
S = 0.0023 x I x L/A
|
|
Where:
| |
|
S is the average slope in percent.
| |
|
I is the contour interval in feet.
| |
|
L is the combined length in contour lines in feet.
| |
|
A is the area in acres of the parcel being considered.
|
In every zoning district the following regulations shall apply:
A.
Every lot hereafter created by subdivision having an average slope
of at least 10%, but not more than 15%, shall have the minimum lot
area increased by a factor of 1.3 and shall not have impervious surfaces
exceeding 30% of the lot area.
B.
Every lot hereafter created by subdivision having an average slope
of at least 15%, but not more than 25%, shall have the minimum lot
area increased by a factor of 1.5 and shall not have impervious surfaces
exceeding 20% of the lot area.
C.
Every lot hereafter created by subdivision having an average slope
of at least 25% shall have the minimum lot area increased by a factor
of two and shall not have impervious surfaces exceeding 10% of the
lot area.
D.
All freestanding structures, buildings and substantial improvements
(with the exception of driveways and utilities when no other location
is feasible) are prohibited on slopes of 25% or greater and are prohibited
on slopes where the soil type is classified as "stony land, steep"
by that document entitled "Soil Survey, Chester and Delaware County,
Pennsylvania," prepared by the United States Department of Agriculture,
Soil Conservation Service, dated May 1963, copies of which are on
file in the office of the Delaware County Conservation District, Rose
Tree Park Hunt Club, 1521 North Providence Road, Media, Pennsylvania
19063.[1]
Neither the approval of any proposed subdivision by any officer,
employee or agency of the Borough of Collingdale, nor the grant of
any subdivision approval by the Borough Council, shall constitute
a representation, guaranty or warranty of any kind by the Borough
of Collingdale or by any of its officers, employees, agencies or members
of its agencies of the safety or practicality of the proposed subdivision
and use, and such approval or grant of approval shall create no liability
on the part of the Borough of Collingdale or its officers, employees,
agencies or members of its agencies.
