Borough of Fox Chapel, PA Technical Provisions

No encroachment, alteration or improvement of any kind shall be made to any watercourse until all adjacent municipalities which may be affected by such action have been notified by the municipality and until all required permits or approvals have first been obtained from the Department of Environmental Protection Regional Office.

No encroachment, alteration or improvement of any kind shall be made to any watercourse unless it can be shown that the activity will not reduce or impede the flood-carrying capacity of the watercourse in any way.

In addition, FEMA and the Pennsylvania Department of Community and Economic Development shall be notified prior to any alteration or relocation of any watercourse.

When a community proposes to permit the following encroachments: any development that causes a rise in the base flood elevations within the floodway; or any development occurring in Zones A1-A30 and Zone AE without a designated floodway which will cause a rise of more than one foot in the base flood elevation; or alteration or relocation of a stream (including but not limited to installing culverts and bridges), the applicant shall (as per 44 CFR 65.12):

Apply to FEMA for conditional approval of such action prior to permitting the encroachments to occur.

Upon receipt of the Administrator's conditional approval of map change and prior to approving the proposed encroachments, a community shall provide evidence to FEMA of the adoption of floodplain management ordinances incorporating the increased base flood elevations and/or revised floodway reflecting the post-project condition.

Upon completion of the proposed encroachments, a community shall provide as-built certifications. FEMA will initiate a final map revision upon receipt of such certifications in accordance with 44 CFR 67.

Any new construction, development, uses or activities allowed within any identified floodplain area shall be undertaken in strict compliance with the provisions contained in this chapter and any other applicable codes, ordinances and regulations.

Within any identified floodplain area, no new construction or development shall be located within the area measured 50 feet landward from the top-of-bank of any watercourse.

§ 350-23 Elevation and floodproofing requirements.

Residential structures.

In AE, A1-30 and AH Zones, any new construction or substantial improvement shall have the lowest floor (including basement) elevated up to, or above, the regulatory flood elevation.

In A Zones, where there are no base flood elevations specified on the FIRM, any new construction or substantial improvement shall have the lowest floor (including basement) elevated up to, or above, the regulatory flood elevation determined in accordance with § 350-18C of this chapter.

The design and construction standards and specifications contained in the 2009 International Building Code (IBC) and in the 2009 International Residential Code (IRC), or the most recent revisions thereof, and ASCE 24 and 34 Pa. Code (Chapters 401 through 405, as amended) shall be utilized where they are more restrictive.

Nonresidential structures.

In AE, A1-30 and AH Zones, any new construction or substantial improvement of a nonresidential structure shall have the lowest floor (including basement) elevated up to, or above, the regulatory flood elevation, or be designed and constructed so that the space enclosed below the regulatory flood elevation:

(a)

Is floodproofed so that the structure is watertight with walls substantially impermeable to the passage of water; and

(b)

Has structural components with the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy.

In A Zones, where no base flood elevations are specified on the FIRM, any new construction or substantial improvement shall have the lowest floor (including basement) elevated or completely floodproofed up to, or above, the regulatory flood elevation determined in accordance with § 350-18C of this chapter.

Any nonresidential structure, or part thereof, made watertight below the regulatory flood elevation shall be floodproofed in accordance with the W1 or W2 space classification standards contained in the publication entitled "Flood-Proofing Regulations" published by the U.S. Army Corps of Engineers (June 1972, as amended March 1992), or with some other equivalent standard. All plans and specifications for such floodproofing shall be accompanied by a statement certified by a registered professional engineer or architect which states that the proposed design and methods of construction are in conformance with the above-referenced standards.

(4)

The design and construction standards and specifications contained in the 2009 International Building Code (IBC) and in the 2009 International Residential Code (IRC) ,or the most recent revisions thereof, and ASCE 24 and 34 Pa. Code (Chapters 401 through 405, as amended) shall be utilized where they are more restrictive.

Space below lowest floor.

Fully enclosed space below the lowest floor (excluding basements), which will be used solely for the parking of a vehicle, building access or incidental storage in an area other than a basement shall be designed and constructed to allow for the automatic entry and exit of floodwaters for the purpose of equalizing hydrostatic forces on exterior walls. The term "fully enclosed space" also includes crawl spaces.

Designs for meeting this requirement must either be certified by a registered professional engineer or architect or meet or exceed the following minimum criteria:

(a)

A minimum of two openings having a net total area of not less than one square inch for every square foot of enclosed space.

(b)

The bottom of all openings shall be no higher than one foot above grade.

(c)

Openings may be equipped with screens, louvers or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.

Historic structures. Historic structures undergoing repair or rehabilitation that would constitute a substantial improvement, as defined in this chapter, must comply with all chapter requirements that do not preclude the structure's continued designation as a historic structure. Documentation that a specific ordinance requirement will cause removal of the structure from the National Register of Historic Places or the State Inventory of Historic Places must be obtained from the Secretary of the Interior or the State Historic Preservation Officer. Any exemption from chapter requirements will be the minimum necessary to preserve the historic character and design of the structure.

§ 350-24 Design and construction standards.

The following minimum standards shall apply for all construction and development proposed within any identified floodplain area:

Fill. Within any identified floodplain area the use of fill shall be prohibited. No variance shall be granted.

Drainage facilities. Storm drainage facilities shall be designed to convey the flow of stormwater runoff in a safe and efficient manner. The system shall ensure proper drainage along streets and provide positive drainage away from buildings. The system shall also be designed to prevent the discharge of excess runoff onto adjacent properties.

Water and sanitary sewer facilities and systems.

All new or replacement water supply and sanitary sewer facilities and systems shall be located, designed and constructed to minimize or eliminate flood damages and the infiltration of floodwaters.

Sanitary sewer facilities and systems shall be designed to prevent the discharge of untreated sewage into floodwaters.

No part of any on-site waste disposal 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.

Other utilities. All other utilities, such as gaslines, electrical and telephone systems, shall be located, elevated (where possible) and constructed to minimize the chance of impairment during a flood.

Streets. The finished elevation of all new streets shall be no more than one foot below the regulatory flood elevation.

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 in § 350-25, Development which may endanger human life, shall be stored at or above the regulatory flood elevation or floodproofed to the maximum extent possible.

Placement of buildings and structures. All buildings and structures shall be designed, located and constructed so as to offer the minimum obstruction to the flow of water and shall be designed to have a minimum effect upon the flow and height of floodwater.

Anchoring.

All buildings and structures shall be firmly anchored in accordance with accepted engineering practices to prevent flotation, collapse or lateral movement.

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.

Floors, walls and ceilings.

Wood flooring used at or below the regulatory flood elevation shall be installed to accommodate a lateral expansion of the flooring, perpendicular to the flooring grain, without causing structural damage to the building.

Plywood used at or below the regulatory flood elevation shall be of a marine or water-resistant variety.

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.

Paints and adhesives.

Paints and other finishes used at or below the regulatory flood elevation shall be of marine or water-resistant quality.

Adhesives used at or below the regulatory flood elevation shall be of a marine or water-resistant variety.

All wooden components (doors, trim, cabinets, etc.) used at or below the regulatory flood elevation shall be finished with a marine or water-resistant paint or other finishing material.

Electrical components.

Electrical distribution panels shall be at least three feet above the base flood elevation.

Separate electrical circuits shall serve lower levels and shall be dropped from above.

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.

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 floodwaters. Additional provisions shall be made for the drainage of these systems in the event that floodwater infiltration occurs.

Uniform Construction Code coordination. The standards and specifications contained in 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.

International Building Code (IBC) 2009, or the latest edition thereof: Sections 801, 1202, 1403, 1603, 1605, 1612, 3402 and Appendix G.