[Ord. 2015-1, 12/16/2015]
1. 
Alteration or relocation of watercourse.
A. 
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's regional office.
B. 
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.
C. 
In addition, FEMA and the Pennsylvania Department of Community and Economic Development shall be notified prior to any alteration or relocation of any watercourse.
2. 
Technical or scientific data shall be submitted to FEMA for a letter of map revision (LOMR) within six months of completion of any new construction, development or other activity resulting in changes to BFE.
3. 
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.
4. 
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, unless the applicant defines the floodway and obtains a permit from the Pennsylvania Department of Environmental Protection.
[Ord. 2015-1, 12/16/2015]
1. 
Residential Structures.
A. 
In AE Zones, any new construction or substantial improvement shall have the lowest floor (including the basement) elevated up to, or above, the regulatory flood elevation in accordance with § 8-402 of this chapter.
B. 
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 401-405 as amended) shall be utilized.
2. 
Nonresidential Structures.
A. 
In AE Zones, any new construction or substantial improvement of a nonresidential structure shall have the lowest floor (including the 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:
(1) 
Is floodproofed so that the structure is watertight with walls substantially impermeable to the passage of water; and
(2) 
Has structural components with the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy:
B. 
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 United States 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.
C. 
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 401-405 as amended) shall be utilized, where they are more restrictive.
3. 
Space Below the Lowest Floor.
A. 
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.
B. 
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) 
A minimum of two openings having a net total area of not less than one square inch for every square foot of enclosed space.
(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 exit of floodwaters.
4. 
Historic Structures. Historic structures undergoing repair or rehabilitation that would constitute a substantial improvement as defined in this chapter, must comply with all ordinance requirements that do not preclude the structure's continued designation as an historic structure. Documentation that a specific ordinance requirement will cause removal of the structure from the National Register of Historic Places or the Commonwealth Inventory of Historic places must be obtained from the Secretary of the Interior or the Commonwealth Historic Preservation Officer. Any exemption from ordinance requirements will be the minimum necessary to preserve the historic character and design of the structure.
5. 
Accessory Structures. Structures accessory to a principal building need not be elevated or floodproofed to remain dry but shall comply, at a minimum, with the following requirements:
A. 
The structure shall not be designed or used for human habitation, but shall be limited to the parking of vehicles, or to the storage of tools, material, and equipment related to the principal use or activity.
B. 
Floor area shall not exceed 200 square feet.
C. 
The structure will have a low damage potential.
D. 
The structure will be located on the site so as to cause the least obstruction to the flow of floodwaters.
E. 
Power lines, wiring, and outlets will be elevated to the regulatory flood elevation.
F. 
Permanently affixed utility equipment and appliances such as furnaces, heaters, washers, dryers, etc., are prohibited.
G. 
Sanitary facilities are prohibited.
H. 
The structure shall be adequately anchored to prevent flotation, collapse, and lateral movement and shall be designed to automatically provide for the entry and exit of floodwater for the purpose of equalizing hydrostatic forces on the walls. 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) 
A minimum of two openings having a net total area of not less than one square inch for every square foot of enclosed space.
(2) 
The bottom of all openings shall be no higher than one foot above grade.
(3) 
Openings may be equipped with screens, louvers, etc., or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.
[Ord. 2015-1, 12/16/2015]
1. 
The following minimum standards shall apply for all construction and development proposed within any identified floodplain area:
A. 
Fill:
(1) 
Within any identified floodplain area, the use of fill shall be prohibited. If a variance is obtained in accordance with the criteria in Part 8, then the following provisions apply:
(a) 
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 Floodplain Administrator; and
5) 
Be used to the extent to which it does not adversely affect adjacent properties.
B. 
Drainage Facilities. Stormwater management and drainage facilities shall conform to the latest revision of the Wrightsville Borough Stormwater Management Ordinance[1] and 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.
[1]
Editor's Note: See Ch. 26, Water.
C. 
Water and Sanitary Sewer Facilities and Systems.
(1) 
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.
(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 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.
D. 
Other Utilities. All other utilities such as gas lines, electrical and telephone systems shall be located, elevated (where possible) and constructed to minimize the chance of impairment during a flood.
E. 
Streets. The finished elevation of all new streets shall be no more than one foot below the regulatory flood elevation.
F. 
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 § 8-504, Development Which May Endanger Human Life, shall be stored at or above the regulatory flood elevation or floodproofed to the maximum extent possible.
G. 
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.
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, perpendicular to 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 and other finishes used at or below the regulatory flood elevation shall be of marine or water-resistant quality.
(2) 
Adhesives used at or below the regulatory flood elevation shall be of a marine or water-resistant variety.
(3) 
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.
K. 
Electrical Components.
(1) 
Electrical distribution panels shall be at least three feet above the base 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 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 401-405), 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 ordinance.
(1) 
International Building Code (IBC) 2009 or the latest edition thereof: Secs. 801, 1202, 1403, 1603, 1605, 1612, 3402, and Appendix G.
(2) 
International Residential Building Code (IRC) 2009 or the latest edition thereof: Secs. R104, R105, R109, R322, Appendix E, and Appendix J.
[Ord. 2015-1, 12/16/2015]
1. 
Within any identified floodplain area, any structure of the kind described in Subsection A, below, shall be prohibited. If a variance is obtained in accordance with the criteria in Part 8, then the provisions of Subsections B, C and D shall apply.
A. 
In accordance with the Pennsylvania Flood Plain Management Act[1] and the regulations adopted by the Department of Community and Economic Development (DCED) as required by the Act, any new or substantially improved structure which will be used for the production or storage of any of the following dangerous materials or substances; or will be used for any activity requiring the maintenance of a supply of more than 550 gallons, or other comparable volume, of any of the following dangerous materials or substances on the premises; or will involve the production, storage, or use of any amount of radioactive substances shall be subject to the provisions of this section, in addition to all other applicable provisions. The following list of materials and substances are considered dangerous to human life:
(1) 
Acetone.
(2) 
Ammonia.
(3) 
Benzene.
(4) 
Calcium carbide.
(5) 
Carbon disulfide.
(6) 
Celluloid.
(7) 
Chlorine.
(8) 
Hydrochloric acid.
(9) 
Hydrocyanic acid.
(10) 
Magnesium.
(11) 
Nitric acid and oxides of nitrogen.
(12) 
Petroleum products (gasoline, fuel oil, etc.).
(13) 
Phosphorus.
(14) 
Potassium.
(15) 
Sodium.
(16) 
Sulphur and sulphur products.
(17) 
Pesticides (including insecticides, fungicides, and rodenticides).
(18) 
Radioactive substances, insofar as such substances are not otherwise regulated.
[1]
Editor's Note: See 32 P.S. § 679.101 et seq.
B. 
Where permitted within any identified floodplain area, any new or substantially improved structure of the kind described in Subsection 1A above shall be:
(1) 
Built in accordance with §§ 8-501, 8-502 and 8-503; and
(2) 
Elevated, or designed and constructed to remain completely dry up to at least 1 1/2 feet above base flood elevation; and
(3) 
Designed to prevent pollution from the structure or activity during the course of a base flood.
(4) 
Any such structure, or part thereof, that will be built below the regulatory flood elevation shall be designed and constructed in accordance with the standards for completely dry floodproofing contained in the publication "Flood-Proofing Regulations (United States Army Corps of Engineers, June 1972, as amended March 1992), or with some other equivalent watertight standard.
[Ord. 2015-1, 12/16/2015]
All subdivision proposals and development proposals containing at least 30 lots or at least three acres, whichever is the lesser, in identified floodplain areas where base flood elevation data are not available shall be supported by hydrologic and hydraulic engineering analyses that determine base flood elevations and floodway information. The analyses shall be prepared by a licensed professional engineer in a format required by FEMA for a conditional letter of map revision and letter of map revision. Submittal requirements and processing fees shall be the responsibility of the applicant.
[Ord. 2015-1, 12/16/2015]
1. 
Within any identified floodplain area manufactured homes shall be prohibited. If a variance is obtained in accordance with the criteria in Part 8, then the following provisions apply:
2. 
Where permitted within any identified floodplain area, all manufactured homes, and any improvements thereto, shall:
A. 
Be placed on a permanent foundation; and
B. 
Be elevated so that the lowest floor of the manufactured home is at least 1 1/2 feet above base flood elevation; and
C. 
Be anchored to resist flotation, collapse, or lateral movement; and
D. 
Have all ductwork and utilities, including HVAC/heat pump, elevated to the regulatory flood elevation.
3. 
Installation of manufactured homes shall be done in accordance with the manufacturers' installation instructions as provided by the manufacturer. Where the applicant cannot provide the above information, the requirements of Appendix E of the 2009 "International Residential Building Code" or the "U.S. Department of Housing and Urban Development's Permanent Foundations for Manufactured Housing," 1984 Edition, draft or latest revision thereto, and 34 Pa. Code Chapter 401-405 shall apply.
4. 
Consideration shall be given to the installation requirements of the 2009 IBC, and the 2009 IRC or the most recent revisions thereto and 34 Pa. Code, as amended, where appropriate and/or applicable to units where the manufacturers' standards for anchoring cannot be provided or were not established for the proposed unit(s) installation.
[Ord. 2015-1, 12/16/2015]
1. 
Within any identified floodplain area, recreational vehicles shall be prohibited. If a variance is obtained in accordance with the criteria in Part 8, then the following provisions apply:
A. 
Recreational vehicles in Zones AE must either:
(1) 
Be on the site for fewer than 60 consecutive days and/or less than 120 cumulative days in one calendar year; and
(2) 
Be fully licensed and ready for highway use; and
(3) 
Be able to be removed within 48 hours of notice in the event of a flood; or
(4) 
Meet the permit requirements for manufactured homes in § 8-506.