[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:
To minimize runoff and soil erosion which is caused by inappropriate development of steep slope land areas.
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.
To protect residents from property damage and personal injury due to runoff and erosion and landslides attributable to nearby development on steeply sloping land.
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.
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:
- AVERAGE SLOPE
- The slope of land determined according to the formula:
In every zoning district the following regulations shall apply:
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.
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.
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.
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.
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.