Chadds Ford Township
City Zoning Code
City Zoning Code
ARTICLE XIX
Floodplain Conservation Overlay District
§ 135-127 Statutory authorization.
The Legislature of the Commonwealth of Pennsylvania has, by the passage of the Pennsylvania Flood Plain Management Act of 1978,[1] delegated the responsibility to local governmental units to adopt floodplain management regulations to promote public health, safety, and the general welfare of its citizenry. Therefore, the Board of Supervisors of Chadds Ford Township does hereby order as follows.
[1]
Editor's Note: See the Flood Plain Management Act, 32 P.S. § 679.101 et seq.
§ 135-128 General provisions.
A.
Intent. The intent of this article is to:
(1)
Promote the general health, welfare, and safety of the community.
(2)
Encourage the utilization of appropriate Construction practices in order to prevent or minimize Flood damage in the future.
(3)
Minimize danger to public health by protecting water supply and natural drainage.
(4)
Reduce financial burdens imposed on the community, its governmental units, and its residents, by preventing excessive Development in areas subject to flooding.
(5)
Comply with federal and state floodplain management requirements.
B.
Applicability.
(1)
It shall be unlawful for any Person, partnership, business or corporation to undertake, or cause to be undertaken, any Construction or Development within any Identified Floodplain Area in Chadds Ford Township unless a permit has been obtained from the floodplain administrator.
C.
Abrogation and greater restrictions. This article supersedes any other conflicting provisions that may be in effect in Identified Floodplain Areas. However, any other ordinance provisions shall remain in full force and effect to the extent that those provisions are more restrictive. If there is any conflict between any of the provisions of this article, the more restrictive shall apply.
D.
Severability. If any section, subsection, paragraph, sentence, clause, or phrase of this article shall be declared invalid for any reason whatsoever, such a decision shall not affect the remaining portions of the article, which shall remain in full force and effect; and for this purpose, the provisions of this article are hereby declared to be severable.
E.
Warning and disclaimer of liability.
(1)
The degree of Flood protection sought by the provisions of this article is considered reasonable for regulatory purposes and is based on accepted engineering methods of study. Larger Floods may occur or Flood heights may be increased by man-made or natural causes, such as ice jams and bridge openings restricted by debris. This article does not imply that areas outside any Identified Floodplain Areas, or that land uses permitted within such areas, will be free from flooding or Flood damages.
(2)
This article shall not create liability on the part of Chadds Ford Township or any officer or Employee thereof for any Flood damages that result from reliance on this article or any administrative decision lawfully made thereunder.
§ 135-129 Administration.
A.
Designation of the floodplain administrator.
(1)
The Township Manager or Township Manager's Designee is hereby appointed to administer and enforce this article and is referred to herein as the "floodplain administrator." The floodplain administrator may:
(a)
Fulfill the duties and responsibilities set forth in these regulations;
(b)
Delegate duties and responsibilities set forth in these regulations to qualified technical personnel, Plan examiners, inspectors, and other Employees; or
(c)
Enter into a written agreement or written contract with another agency or private sector entity to administer specific provisions of these regulations. Administration of any part of these regulations by another entity shall not relieve the community of its responsibilities pursuant to the participation requirements of the National Flood Insurance Program as set forth in the Code of Federal Regulations at 44 CFR 59.22.
(2)
In the absence of a designated floodplain administrator, the floodplain administrator duties are to be fulfilled by the Township Secretary.
B.
Permit required. A permit shall be required before any Construction or Development is undertaken within any area of Chadds Ford Township.
C.
Duties and responsibilities of the floodplain administrator.
(1)
The floodplain administrator shall issue a permit only after it has been determined that the proposed work to be undertaken will be in conformance with the requirements of this article and all other applicable Codes and ordinances.
(2)
Prior to the issuance of any permit for work in an Identified Floodplain Area, the floodplain administrator shall review the Application for the permit to determine if all other necessary government permits required by state and federal laws have been obtained, such as those required by the Pennsylvania Sewage Facilities Act (Act 1966-537, as amended)[1]; the Pennsylvania Dam Safety and Encroachments Act (Act 1978-325, as amended)[2]; the Pennsylvania Clean Streams Act (Act 1937-394, as amended)[3]; and the United States Clean Water Act, Section 404, 33 U.S.C. § 1344. No permit for work in an Identified Floodplain Area shall be issued until this determination has been made.
(3)
In the case of existing Structures, prior to the issuance of any permit for work in an Identified Floodplain Area, the floodplain administrator shall review the history of repairs to the subject Building, so that any Repetitive Loss concerns can be addressed before the permit is issued.
(4)
During the Construction period, the floodplain administrator or other authorized official shall inspect the Premises to determine that the work is progressing in compliance with the information provided on the permit application and with all applicable municipal laws and ordinances. He/she shall make as many inspections during and upon completion of the work as are necessary.
(5)
In the discharge of his/her duties, the floodplain administrator shall have the authority to enter any Building, Structure, Premises or Development in the Identified Floodplain Area, upon presentation of proper credentials, at any reasonable hour to enforce the provisions of this article.
(6)
In the event the floodplain administrator discovers that the work does not comply with the permit application or any applicable laws and ordinances, or that there has been a false statement or misrepresentation by any Applicant, the floodplain administrator shall revoke the permit and report such fact to the Board of Supervisors for whatever action it considers necessary.
(7)
The floodplain administrator shall maintain in perpetuity all records associated with the requirements of this article, including, but not limited to, finished construction elevation data, permitting, inspection and enforcement.
(8)
The floodplain administrator is the official responsible for submitting a biennial report to Federal Emergency Management Agency (FEMA) concerning community participation in the National Flood Insurance Program.
(9)
The responsibility, authority and means to implement the commitments of the floodplain administrator can be delegated from the Person identified. However, the ultimate responsibility lies with the Person identified in this article as the floodplain administrator/manager.
(10)
The floodplain administrator shall consider the requirements of 34 Pa. Code and the 2009 IBC and the 2009 IRC, or the latest edition thereof adopted by the State of Pennsylvania.
D.
Application procedures and requirements.
(1)
Application for such a zoning permit shall be made, in writing, on forms supplied by Chadds Ford Township. Such Application shall contain the following:
(a)
Name and address of applicant.
(b)
Name and address of owner of land on which proposed Construction is to occur.
(c)
Name and address of contractor.
(d)
Lot location, including address.
(e)
Listing of other permits required.
(f)
Brief description of proposed work and estimated cost, including a breakout of Flood-related cost and the market value of the Building before the Flood damage occurred, where appropriate.
(g)
A Plan of the Lot showing the exact size and location of the proposed Construction as well as any existing Buildings or other Structures.
(2)
If any proposed Construction or Development is located entirely or partially within any Identified Floodplain Area, Applicants for permits shall provide all the necessary information in sufficient detail and clarity to enable the floodplain administrator to determine that:
(a)
All such proposals are consistent with the need to minimize Flood damage and conform with the requirements of this article and all other applicable Codes and ordinances;
(b)
All utilities and facilities, such as Sewer, gas, electrical and Water Systems, are located and constructed to minimize or eliminate Flood damage;
(c)
Adequate drainage is provided so as to reduce exposure to Flood hazards;
(d)
Structures will be Anchored to prevent flotation, collapse, or lateral movement;
(e)
Building materials are flood-resistant;
(f)
Appropriate practices that minimize Flood damage have been used; and
(g)
Electrical, heating, ventilation, plumbing, air-conditioning equipment, and other service facilities have been designed and located to prevent water entry or accumulation.
(3)
Applicants shall file the following minimum information plus any other pertinent information as may be required by the floodplain administrator to make the above determination:
(a)
A completed permit application form.
(b)
A Plan of the entire Lot, clearly and legibly drawn at a scale of one inch being equal to 100 feet or less, showing the following:
[1]
North arrow, scale, and date;
[2]
Topographic contour lines, if available;
[3]
The location of all existing and proposed Buildings, Structures, and other improvements, including the location of any existing or proposed Subdivision and Development;
[4]
The location of all existing Streets, drives, and other accessways; and
[5]
The location of any existing bodies of water or Watercourses, Identified Floodplain Areas, and, if available, information pertaining to the Floodway, and the flow of water, including direction and velocities.
(c)
Plans of all proposed Buildings, Structures and other improvements, drawn at suitable scale, showing the following:
[1]
The proposed Lowest Floor elevation of any proposed Building based upon North American Vertical Datum of 1988;
[2]
The Base Flood Elevation (BFE);
[3]
Supplemental information as may be necessary under 34 Pa. Code, the 2009 IBC or the 2009 IRC, or latest edition thereof adopted by the State of Pennsylvania.
(d)
The following data and documentation:
[1]
Detailed information concerning any proposed Floodproofing measures and corresponding elevations.
[2]
If available, information concerning Flood depths, pressures, velocities, impact and uplift forces and other factors associated with a Base Flood.
[3]
Documentation, certified by a registered professional engineer or architect, to show that the cumulative effect of any proposed Development within any Identified Floodplain Area (see § 135-130A) when combined with all other existing and anticipated Development, will not cause any increase in the Base Flood Elevation. AE Areas adjacent to Floodways are exempt.
[4]
A document, certified by a registered professional engineer or architect, which states that the proposed Construction or Development has been adequately designed to withstand the pressures, velocities, impact and uplift forces associated with the Base Flood. Such statement shall include a description of the type and extent of Floodproofing measures that have been incorporated into the design of the Structure and/or the Development.
[5]
Detailed information needed to determine compliance with § 135-131C(6), Storage, and § 135-131D, Development which may endanger human life, including:
[a]
The amount, location and purpose of any materials or substances referred to in § 195-131C(6) and D that are intended to be used, produced, stored or otherwise maintained on site.
[6]
The appropriate component of the Department of Environmental Protection's "Planning Module for Land Development."
[7]
Where any excavation or grading is proposed, a Plan, meeting the requirements of the Department of Environmental Protection, to implement and maintain erosion and sedimentation control.
(e)
Applications for permits shall be accompanied by a fee, payable to Chadds Ford Township, based upon the estimated cost of the proposed Construction as determined by the floodplain administrator.
E.
Review of application by others. A copy of all Plans and Applications for any proposed Construction or Development in any Identified Floodplain Area to be considered for approval may be submitted by the floodplain administrator to any other appropriate agencies and/or individuals (e.g., Planning Commission, Township Engineer, etc.) for review and comment.
F.
Changes. After the issuance of a permit by the floodplain administrator, no changes of any kind shall be made to the Application, permit or any of the Plans, specifications or other documents submitted with the Application without the written consent or approval of the floodplain administrator. Requests for any such change shall be in writing and shall be submitted by the Applicant to the floodplain administrator for consideration.
G.
Placards. In addition to the permit, the floodplain administrator shall issue a placard, or similar document, which shall be displayed on the Premises during the time Construction is in progress. This placard shall show the number of the permit and the date of its issuance, and shall be signed by the floodplain administrator.
H.
Actual start of construction.
(1)
Work on the proposed Construction or Development shall begin within 180 days after the date of issuance of the permit. Work shall also be completed within 12 months after the date of issuance of the permit or the permit shall expire, unless a time extension is granted, in writing, by the floodplain administrator.
(2)
The "actual start of Construction" means either the first placement of permanent Construction of a Structure on a Lot, such as the pouring of slab or footings, the installation of piles, the Construction of columns, or any work beyond the stage of excavation; or the placement of a Manufactured Home on a foundation. Permanent Construction does not include land preparation such as clearing, grading, and filling; nor does it include the installation of Streets and/or walkways; nor does it include excavation for a Basement, footings, piers, or foundations or the erection of temporary forms; nor does it include the installation on the property of Accessory Buildings, such as garages or Sheds not occupied as Dwelling Units or not part of the main Structure. For a Substantial Improvement, the "actual start of Construction" means the first Alteration of any wall, ceiling, floor, or other structural part of a Building, whether or not that Alteration affects the external dimensions of the Building.
(3)
Time extensions shall be granted only if a written request is submitted by the Applicant, who sets forth sufficient and reasonable cause for the floodplain administrator to approve such a request, and the original permit is compliant with the ordinance and FIRM/FIS in effect at the time the extension is granted.
I.
Enforcement.
(1)
Notices. Whenever the floodplain administrator or other authorized municipal representative determines that there are reasonable grounds to believe that there has been a violation of any provision(s) of this article, or of any regulation(s) adopted pursuant thereto, the floodplain administrator shall give notice of such alleged violation as hereinafter provided. Such notice shall:
(a)
Be in writing;
(b)
Include a statement of the reasons for its issuance;
(c)
Allow a reasonable time, not to exceed a period of 30 days, for the performance of any act it requires;
(d)
Be served upon the property Owner or his or her Agent, as the case may require; provided, however, that such notice or order shall be deemed to have been properly served upon such Owner or Agent when a copy thereof has been served with such notice by any other method authorized or required by the laws of this state; and
(e)
Contain an outline of remedial actions which, if taken, will affect compliance with the provisions of this article.
(2)
Penalties. Any Person who fails to comply with any or all of the requirements or provisions of this article or who fails or refuses to comply with any notice, order or direction of the floodplain administrator or any other authorized Employee of the municipality shall be guilty of an offense and, upon conviction, shall pay a fine to Chadds Ford Township of not less than $25 nor more than $600, plus costs of prosecution. In addition to the above penalties, all other actions are hereby reserved, including an action in equity for the proper enforcement of this article. The imposition of a fine or penalty for any violation of, or noncompliance with, this article shall not excuse the violation or noncompliance or permit it to continue. All such Persons shall be required to correct or remedy such violations and noncompliance within a reasonable time. Any Development initiated or any Structure or Building constructed, reconstructed, enlarged, altered, or relocated in noncompliance with this article may be declared by the Board of Supervisors to be a public nuisance and abatable as such.
J.
Appeals.
(1)
Any Person aggrieved by any action or decision of the floodplain administrator concerning the administration of the provisions of this article may appeal to the Zoning Hearing Board. Such appeal shall be filed, in writing, within 30 days after the decision, determination or action of the floodplain administrator.
(2)
Upon receipt of such appeal, the Zoning Hearing Board shall consider the appeal in accordance with the Municipalities Planning Code and any other local ordinance.
§ 135-130 Identification of floodplain areas.
A.
Identification.
(1)
The Identified Floodplain Area shall be:
(a)
Any areas of Chadds Ford Township classified as Special Flood Hazard Areas (SFHAs) in the Flood Insurance Study (FIS) and the accompanying Flood Insurance Rate Maps (FIRMs), dated November 18, 2009, and issued by the Federal Emergency Management Agency (FEMA), or the most-recent revision thereof, including all digital data developed as part of the Flood Insurance Study; and
(b)
Any community-identified Flood hazard areas.
(2)
The above-referenced FIS and FIRMs, and any subsequent revisions and amendments, are hereby adopted by Chadds Ford Township and declared to be a part of this article.
B.
Description and special requirements of identified floodplain areas. The Identified Floodplain Area shall consist of the following specific areas:
(1)
The Floodway Area shall be those areas identified in the FIS and the FIRM as Floodway and which represent the channel of a Watercourse and the adjacent land areas that shall be reserved in order to discharge the Base Flood without increasing the water surface elevation by more than one foot at any point. This term shall also include Floodway Areas that have been identified in other available studies or sources of information for those Special Flood Hazard Areas where no Floodway has been identified in the FIS and FIRM.
(a)
Within any Floodway Area, no encroachments, including fill, New Construction, Substantial Improvements, or other Development, shall be permitted unless it has been demonstrated through hydrologic and hydraulic analysis performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in Flood levels within the community during the occurrence of the Base Flood Discharge.
(b)
Within any Floodway Area, no New Construction or Development shall be allowed, unless the appropriate permit is obtained from the Department of Environmental Protection's regional office.
(2)
The AE Area/District shall be those areas identified as an AE Zone on the FIRM included in the FIS prepared by FEMA for which Base Flood Elevations have been provided.
(a)
The AE Area adjacent to the Floodway shall be those areas identified as an AE Zone on the FIRM included in the FIS prepared by FEMA for which Base Flood Elevations have been provided and a Floodway has been delineated.
(3)
The A Area/District shall be those areas identified as an A Zone on the FIRM included in the FIS prepared by FEMA and for which no Base Flood Elevations have been provided. For these areas, elevation and Floodway information from other federal, state, or other acceptable sources shall be used when available. Where other acceptable information is not available, the Base Flood Elevation shall be determined by using the elevation of a point on the boundary of the Identified Floodplain Area that is nearest the Construction site. In lieu of the above, the municipality may require the Applicant to determine the elevation with hydrologic and hydraulic engineering techniques. Hydrologic and hydraulic analyses shall be undertaken only by professional engineers or others of demonstrated qualifications, who shall certify that the technical methods used correctly reflect currently accepted technical concepts. Studies, analyses, computations, etc., shall be submitted in sufficient detail to allow a thorough technical review by the municipality.
(4)
Community-identified Flood hazard areas shall be those areas where Chadds Ford Township has identified local Flood hazard or ponding areas, as delineated and adopted on a local Flood hazard map using best available topographic data and locally derived information such as Flood of record, historic high-water marks, soils or approximate study methodologies.
C.
Changes in identification of area. The Identified Floodplain Area may be revised or modified by the Board of Supervisors where studies or information provided by a qualified agency or Person documents the need for such revision. However, prior to any such change to the Special Flood Hazard Area, approval shall be obtained from FEMA. Additionally, as soon as practicable, but not later than six months after the date such information becomes available, a community shall notify FEMA of the changes to the Special Flood Hazard Area by submitting technical or scientific data. See § 135-131A(1)(c) for situations where FEMA notification is required.
D.
Boundary disputes. Should a dispute concerning any identified floodplain boundary arise, an initial determination shall be made by the floodplain administrator, and any party aggrieved by this decision or determination may appeal to the Board of Supervisors. The burden of proof shall be on the appellant.
E.
Jurisdictional boundary changes. Prior to Development occurring in areas where annexation or other corporate boundary changes are proposed or have occurred, the community shall review Flood hazard data affecting the lands subject to boundary changes. The community shall adopt and enforce floodplain regulations in areas subject to annexation or corporate boundary changes that meet or exceed those in 44 CFR 60.3.
§ 135-131 Technical provisions.
A.
General.
(1)
Alteration or relocation of watercourses.
(a)
No encroachment, Alteration, or improvement of any kind shall be made to any Watercourse until all adjacent municipalities that 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)
When Chadds Ford Township 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 A1-30 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):
(a)
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.
(b)
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.
(c)
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 Part 67.
(3)
Any New Construction, Development, use(s) or activities allowed within any Identified Floodplain Area shall be undertaken in strict compliance with the provisions contained in this article and any other applicable Codes, ordinances and regulations; provided, however, that no New Construction, Development, use(s) or activities may occur unless they are at least one foot above the Base Flood Elevation.
(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.
B.
Elevation and floodproofing requirements. Within any Identified Floodplain Area, any new walled and roofed Building, including a gas or liquid storage tank that is principally above ground, as well as a Manufactured Home shall be prohibited. If a Variance is obtained for New Construction or Substantial Improvements in the Identified Floodplain Area in accordance with the criteria in § 135-134, then the following provisions apply:
(1)
Residential structures.
(a)
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.
(b)
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 § 135-130B(3) of this article.
(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 latest edition thereof adopted by the State of Pennsylvania, and ASCE 24 and 34 Pa. Code (Chapters 401-405, as amended) shall be utilized where they are more restrictive.
(2)
Nonresidential structures.
(a)
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:
(b)
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 § 135-130B(3) of this article.
(c)
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.
(d)
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 latest edition thereof adopted by the State of Pennsylvania, 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)
Basements are prohibited.
(b)
Fully enclosed space below the Lowest Floor (excluding Basements) that 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.
(c)
Designs for meeting this requirement shall either be certified by a registered professional engineer or architect or shall 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 shall be provided.
[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, shall 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 State Inventory of Historic Places shall be obtained from the Secretary of the Interior or the State 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 Lot 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 shall 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 shall be provided.
[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.
C.
Design and construction standards. The following minimum standards shall apply for all Construction and Development proposed within any Identified Floodplain Area:
(1)
Fill. Within any Identified Floodplain Area, the use of fill shall be prohibited. If a Variance is obtained in accordance with the criteria in § 135-134, then the following provisions apply:
(a)
Consist of soil or small rock materials only; sanitary landfills shall not be permitted;
(b)
Be compacted to provide the necessary permeability and resistance to erosion, scouring, or settling;
(c)
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
(d)
Be used to the extent to which it does not adversely affect adjacent properties.
(2)
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.
(3)
Water and sanitary sewer facilities and systems.
(a)
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.
(b)
Sanitary sewer facilities and systems shall be designed to prevent the discharge of untreated Sewage into floodwaters.
(c)
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.
(d)
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.
(4)
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.
(5)
Streets. The finished elevation of all new Streets shall be no more than one foot below the Regulatory Flood Elevation.
(6)
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 § 135-131D, Development which may endanger human life, shall be stored at or above the Regulatory Flood Elevation or floodproofed to the maximum extent possible.
(7)
Placement of buildings and other structures. All Buildings and other 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.
(8)
Anchoring.
(a)
All Buildings and other Structures shall be firmly Anchored in accordance with accepted engineering practices to prevent flotation, collapse, or lateral movement.
(b)
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.
(9)
Floors, walls and ceilings.
(a)
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.
(b)
Plywood used at or below the Regulatory Flood Elevation shall be of a marine or water-resistant variety.
(c)
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.
(d)
Windows, doors, and other components at or below the Regulatory Flood Elevation shall be made of metal or other water-resistant material.
(10)
Paints and adhesives.
(a)
Paints and other finishes used at or below the Regulatory Flood Elevation shall be of marine or water-resistant quality.
(b)
Adhesives used at or below the Regulatory Flood Elevation shall be of a marine or water-resistant variety.
(c)
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.
(12)
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.
(13)
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.
(14)
Uniform Construction Code coordination. The standards and specifications contained in 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 article, to the extent that they are more restrictive and supplement the requirements of this article:
(a)
International Building Code (IBC) 2009, or the latest edition thereof adopted by the State of Pennsylvania: Sections 801, 1202, 1403, 1603, 1605, 1612, 3402, and Appendix G.
(b)
International Residential Building Code (IRC) 2009, or the latest edition thereof adopted by the State of Pennsylvania; Sections R104, R105, R109, R322, Appendix E, and Appendix J.
D.
Development which may endanger human life. Within any Identified Floodplain Area, any Structure of the kind described in Subsection D(1) below shall be prohibited. If a Variance is obtained in accordance with the criteria in § 135-134, then the following provisions apply [§ 135-131D(2),(3) and (4)]:
(1)
In accordance with the Pennsylvania Flood Plain Management Act,[1] and the regulations adopted by the Department of Community and Economic Development as required by the Act, any new or substantially improved Structure that: 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 materials and substances are considered dangerous to human life:
(a)
Acetone.
(b)
Ammonia.
(c)
Benzene.
(d)
Calcium carbide.
(e)
Carbon disulfide.
(f)
Celluloid.
(g)
Chlorine.
(h)
Hydrochloric acid.
(i)
Hydrocyanic acid.
(j)
Magnesium.
(k)
Nitric acid and oxides of nitrogen.
(l)
Petroleum products (gasoline, fuel oil, etc.).
(m)
Phosphorus.
(n)
Potassium.
(o)
Sodium.
(p)
Sulphur and sulphur products.
(q)
Pesticides (including insecticides, fungicides, and rodenticides).
(r)
Radioactive substances, insofar as such substances are not otherwise regulated.
[1]
Editor's Note: See the Flood Plain Management Act, 32 P.S. § 679.101 et seq.
(2)
Within any Identified Floodplain Area, any new or substantially improved Structure of the kind described in Subsection D(1) above shall be prohibited within the area measured 50 feet landward from the Top of Bank of any Watercourse.
(3)
Within any Floodway Area, any Structure of the kind described in Subsection D(1) above shall be prohibited. Where permitted within any Identified Floodplain Area, any new or substantially improved residential Structure of the kind described in § 135-131D(1) above shall be elevated to remain completely dry up to at least 1 1/2 feet above Base Flood Elevation and built in accordance with § 135-131A, B and C.
(4)
Where permitted within any Identified Floodplain Area, any new or substantially improved nonresidential Structure of the kind described in § 135-131D(1) above shall be built in accordance with § 135-131A, B and C, including:
(a)
Elevated, or designed and constructed to remain a Completely Dry Space up to at least two feet above Base Flood Elevation; and
(b)
Designed to prevent pollution from the Structure or activity during the course of a Base Flood.
(c)
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.
E.
Special requirements for subdivisions and development. All Subdivision proposals and Development proposals 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.
F.
Special requirements for manufactured homes.
(1)
Within any Identified Floodplain Area, Manufactured Homes shall be prohibited. If a Variance is obtained in accordance with the criteria in § 135-134, then the following provisions apply:
(2)
Within any Floodway Area/District, Manufactured Homes shall be prohibited. If a Variance is obtained in accordance with the criteria in § 135-134, then the following provisions apply:
(3)
Within any Identified Floodplain Area, Manufactured Homes shall be prohibited within the area measured 50 feet landward from the Top of Bank of any Watercourse.
(4)
Where permitted within any Identified Floodplain Area, all Manufactured Homes, and any improvements thereto, shall be:
(a)
Placed on a permanent foundation;
(b)
Elevated so that the Lowest Floor of the Manufactured Home is at least two feet above Base Flood Elevation;
(c)
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.
(5)
Installation of Manufactured Homes shall be done in accordance with the manufacturer's 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 United States Department of Housing and Urban Development's Permanent Foundations for Manufactured Housing, 1984 Edition, draft or latest revision thereto, and 34 Pa. Code Chapters 401-405 shall apply.
(6)
Consideration shall be given to the installation requirements of the 2018 IBC and the 2018 IRC, or the latest edition thereof adopted by the State of Pennsylvania, 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(s') installation.
§ 135-132 Prohibited activities.
A.
General. In accordance with the administrative regulations promulgated by the Department of Community and Economic Development to implement the Pennsylvania Flood Plain Management Act,[1] the following activities shall be prohibited within any Identified Floodplain Area:
(2)
The commencement of, or any Construction of, a new Manufactured Home Park or Manufactured Home Subdivision, or Substantial Improvement to an existing Manufactured Home Park or Manufactured Home Subdivision.
[1]
Editor's Note: See the Flood Plain Management Act, 32 P.S. § 679.101 et seq.
§ 135-133 Existing structures in identified floodplain areas.
A.
Existing structures. The provisions of this article do not require any changes or improvements to be made to lawfully existing Structures. However, when an improvement is made to any existing Structure, the provisions of Subsection B shall apply.
B.
Improvements. The following provisions shall apply whenever any improvement is made to an existing Structure located within any Identified Floodplain Area:
(1)
No expansion or Enlargement of an existing Structure shall be allowed within any Identified Floodplain Area that would cause any increase in BFE. In A Area/District(s), BFEs are determined using the methodology in § 135-130B(3).
(2)
Any modification, Alteration, reconstruction, or improvement of any kind to an existing Structure to an extent or amount of 50% or more of its market value shall constitute a Substantial Improvement and shall be undertaken only in full compliance with the provisions of this article.
(3)
The above activity shall also address the requirements of 34 Pa. Code, as amended, and the 2009 IBC and the 2009 IRC, or most-recent revision thereof adopted by the State of Pennsylvania.
(4)
Any modification, Alteration, reconstruction, or improvement of any kind to an existing Structure, to an extent or amount of less than 50% of its market value, shall be elevated and/or floodproofed to the greatest extent possible.
(5)
Any modification, Alteration, reconstruction, or improvement of any kind that meets the definition of "Repetitive Loss" shall be undertaken only in full compliance with the provisions of this article.
§ 135-134 Variances.
A.
General. If compliance with any of the requirements of this article would result in an exceptional hardship to a prospective builder, Developer or Landowner, Chadds Ford Township may, upon request, grant relief from the strict application of the requirements.
B.
Variance procedures and conditions.
(1)
Requests for Variances shall be considered by Chadds Ford Township in accordance with the procedures contained in § 135-209 and the following:
(a)
No Variance shall be granted within any Identified Floodplain Area that would cause any increase in BFE. In an A Area/District, BFEs are determined using the methodology in § 135-130B(3).
(b)
Except for a possible modification of the Regulatory Flood Elevation requirement involved, no Variance shall be granted for any of the other requirements pertaining specifically to Development regulated by § 135-131D, Development which may endanger human life.
(d)
If granted, a Variance shall involve only the least modification necessary to provide relief.
(e)
In granting any Variance, Chadds Ford Township shall attach whatever reasonable conditions and safeguards it considers necessary in order to protect the public health, safety, and welfare and to achieve the objectives of this article.
(g)
(h)
A complete record of all Variance requests and related actions shall be maintained by Chadds Ford Township. In addition, a report of all Variances granted during the year shall be included in the annual report to FEMA.
(2)
Notwithstanding any of the above, however, all Structures shall be designed and constructed so as to have the capability of resisting the 100-Year Flood.