The following minimum standards shall apply for all subdivision
and/or land development plans proposed within any identified floodplain
area:
A. Fill. If fill is used, it shall:
(1) Extend laterally at least 15 feet beyond the building line from all
points;
(2) Consist of soil or small rock materials only; sanitary landfills
shall not be permitted;
(3) Be compacted to provide the necessary permeability and resistance
to erosion, scouring, or settling;
(4) Be no steeper than one vertical to two horizontal feet unless substantiated
data justifying steeper slopes are submitted to and approved by the
Borough; and
(5) Be used to the extent to which it does not adversely affect adjacent
properties.
B. Storm drainage facilities shall be designed to convey the flow of
surface waters without damage to persons or property. The system shall
insure drainage at all points along streets, and provide positive
drainage away from buildings and on-site water disposal sites. Plans
shall be subject to the approval of the Borough Council. The Borough
Council may require a primarily underground system to accommodate
frequent floods and a secondary surface system to accommodate larger,
less frequent floods. Drainage plans shall be consistent with local
and regional drainage plans. The facilities shall be designed to prevent
the discharge of excess runoff into adjacent properties.
C. Water and sanitary sewer facilities and systems.
(1) All new or replacement water and sanitary sewer facilities and systems
shall be located, designed and constructed to minimize or eliminate
flood damages and the infiltration of floodwaters and shall be floodproofed
up to the regulatory flood elevation.
(2) Sanitary sewer facilities and systems shall be designed to prevent
the discharge of untreated sewage into floodwaters.
(3) No part of any on-site sewage system shall be located within any
identified floodplain area except in strict compliance with all state
and local regulations for such systems. If any such system is permitted,
it shall be located so as to avoid impairment to it, or contamination
from it, during a flood.
(4) The design and construction provisions of the UCC and FEMA No. 348,
Protecting Building Utilities From Flood Damages and the International
Private Sewage Disposal Code shall be utilized.
D. Other utilities. All other utilities such as gas lines, electrical,
television cable and telephone systems shall be located, elevated
(where possible) and constructed to minimize the chance of impairment
during a flood and shall be floodproofed up to the regulatory flood
elevation.
E. Streets. The finished elevation of all new streets shall be no more
than one foot below the regulatory flood elevation.
F. Placement of buildings and structures. Whenever possible, all lots within a subdivision plan shall be designed such that adequate buildable area exists on each lot which is not within any identified floodplain area. If a part of any proposed structure in a land development plan extends into any identified floodplain area, such structure shall be reviewed for compliance with all applicable regulations of Chapter
295, Zoning, prior to approval of the plan.
G. Storage. All materials that are buoyant, flammable, explosive, or
in times of flooding, could be injurious to human, animal, or plant
life, and not listed elsewhere in the Borough of Waynesboro ordinances
as dangerous to human life shall be stored at or above the regulatory
flood elevation and/or floodproofed to the maximum extent possible.
H. Anchoring.
(1) All buildings and structures shall be firmly anchored in accordance
with accepted engineering practices to prevent flotation, collapse,
or lateral movement.
(2) All air ducts, large pipes, storage tanks, and other similar objects
or components located below the regulatory flood elevation shall be
securely anchored or affixed to prevent flotation.
I. Floors, walls, and ceilings.
(1) Wood flooring used at or below the regulatory flood elevation shall
be installed to accommodate a lateral expansion of the flooring grain
without causing structural damage to the building.
(2) Plywood used at or below the regulatory flood elevation shall be
of a "marine" or "water-resistant" variety.
(3) Walls and ceilings at or below the regulatory flood elevation shall
be designed and constructed of materials that are water-resistant
and will withstand inundation.
(4) Windows, doors, and other components at or below the regulatory flood
elevation shall be made of metal or other water-resistant material.
J. Paints and adhesives.
(1) Paints or other finishes used at or below the regulatory flood elevation
shall be of a "marine" or "water-resistant" quality.
(2) Adhesives used at or below the regulatory flood elevation shall be
of a "marine" or "water-resistant" quality.
(3) All wooden components (doors, trim, cabinets, etc.) shall be finished
with a "marine" or "water-resistant" paint or other finishing material.
K. Electrical components.
(1) Electrical distribution panels shall be at least three feet above
the one-hundred-year flood elevation.
(2) Separate electrical circuits shall serve lower levels and shall be
dropped from above.
L. Equipment. Water heaters, furnaces, air-conditioning and ventilating
units, and other electrical, mechanical, or utility equipment or apparatus
shall not be located below the regulatory flood elevation.
M. Fuel supply systems. All gas and oil supply systems shall be designed
to prevent the infiltration of floodwaters into the system and discharges
from the system into the floodwaters. Additional provisions shall
be made for the drainage of these systems in the event that floodwater
infiltration occurs.
N. Uniform construction code coordination. The standards and specifications
contained 34 Pa. Code Chapters 401 through 405, as amended, and not
limited to the following provisions shall apply to the above and other
sections and subsections of this chapter, to the extent that they
are more restrictive and supplement the requirements of this chapter.
(1) International Building Code (IBC) 2009 or the latest edition thereof:
Sections 801, 1202, 1403, 1603, 1605, 1612, 3402, and Appendix G.
(2) International Residential Building Code (IRC) 2009 or the latest
edition thereof: Sections R104, R105, R109, R323, Appendix AE101,
Appendix E and Appendix J.
O. Enclosed space below the lowest floor. Enclosed space below the lowest
floor (including basement) may be permitted, provided that such space
shall be designed to automatically equalize hydrostatic flood forces
on exterior walls by allowing for the entry and exit of floodwater.
Designs for meeting this requirement must either be certified by a
registered professional engineer or architect or meet or exceed the
following minimum criteria:
(1) At least two openings shall be provided having a total net open area
of at least one square inch for every square foot of enclosed space
subject to flooding.
(2) The bottom of all openings shall be no higher than one foot above
grade.
(3) Openings may be equipped with screens, louvers, or other coverings
or devices provided that they permit the automatic entry and exist
of floodwaters.