[Ord. No. 1049, 11/18/2019]
1.
All land and watercourses defined herein as floodplains shall be subject to the following regulations regardless of the district regulations within which such land and watercourses are located. The identified floodplain area shall be: A) any areas of Ferguson Township subject to the 100-year flood, which is identified as Zone A (area of special flood hazard) in the Flood Insurance Study (FIS) with the effective date of May 4, 2009, and the accompanying maps or the most recent revision thereof as issued by the Federal Emergency Management Agency, including all digital data developed as part of the Flood Insurance Study, and B) those areas designated as alluvial soils by the Soil Survey of Centre County, Pennsylvania, prepared by the U.S. Department of Agriculture, dated 1981.
2.
The AE Area/District (Flood Insurance Risk Zone) shall be those areas identified as an AE Zone on the Flood Insurance Rate Map (FIRM) included in the FIS prepared by FEMA and for which 100-year-flood elevations have been provided in the FIS.
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 100-year-flood elevations have been provided. For these areas, elevation and floodway information from federal, state or other acceptable sources shall be used when available. Where other acceptable information is not available, the elevation shall be determined by using the elevation of a point on the boundary of the identified floodplain area which is nearest the construction site. In lieu of the above, the municipality may require the applicant to determine the 100-year-flood elevation with detailed hydrologic and hydraulic engineering techniques. Hydrologic and hydraulic analyses shall be undertaken only by professional engineers or others of demonstrated qualification, 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 Township. Where a difference exists between these two documents, the document which delineates the greater area shall be used. Any changes to the data contained in the Flood Insurance Study are subject to the approval of the Federal Insurance Administration.
A.
Intent. It is the intent of this section to preserve the natural functions of floodplains, to protect life and property from the hazards of flooding, to protect the waters of the Township and to minimize the financial burdens which floods impose upon the community. These purposes shall be advanced by preventing certain uses and structures from locating in floodplains while allowing others which will not 1) impede the flow of floodwaters, 2) present the hazard of pollution, erosion and sedimentation of floodplains and watercourses, 3) result in increased surface runoff and downstream flooding, and 4) impede the recharge of aquifers.
(1)
Areas subject to periodic inundation by floodwaters shall include a) all flood hazard areas indicated on the aforementioned Flood Insurance Rate Maps, and b) the following alluvial soil types indicated on the aforementioned soil survey maps:
Symbol | Name |
|---|---|
At | Atkins Silt Loam |
Ba | Basher Loam |
Ca | Carlisle Muck |
Ch | Chagrin Soils |
DU | Dunning Silty Clay Loam |
LX | Lindside Soils |
Mm | Melvin Silt Loam |
No | Nolin Silt Loam |
Ph | Philo Loam |
Pk | Philo and Atkins very stony soil |
Po | Pope soils |
(2)
Natural drainage swales subject to periodic inundation by runoff rather than floodwaters are also subject to the floodplain conservation regulations. Such drainage swales are identified as Nolin silt loam soils, soil symbol "No" on the aforementioned soil survey maps.
B.
Permitted Uses. Floodplains may be only used for the following, provided such uses and structures do not conflict with the limitations of Subsection 3C, below:
(1)
The tilling of the land, the raising of crops, fruits and vegetables and the raising and keeping of livestock and poultry.
(2)
Horticultural uses related to the raising, propagating and selling of trees, shrubs, flowers and other plant materials.
(3)
Forestry uses related to the harvesting of lumber products.
(4)
Public and private conservation areas for the conservation of open space, water, soil and wildlife resources.
(5)
Retaining walls, flood retention dams, culverts and bridges as permitted by the Pennsylvania Department of Environmental Protection.
(6)
Customary uses accessory to the above.
C.
Use Limitations. Uses permitted in § 27-701, Subsection 3B are limited as follows:
(1)
All new construction or development (including substantial improvements) are prohibited.
(2)
Improvements or modifications to an existing structure shall be permitted but they shall be elevated or floodproofed as much as possible, provided that said improvements or modifications involve a) less than 50% of the fair market value, and b) less than 50% of the square footage as it existed on March 8, 1984.
(3)
All other uses whether temporary or permanent are prohibited including, but not limited to, the following which are not interpreted as being customary accessory uses: filling in of the floodplain; sanitary landfill or dumping of any kind; fences which impede, retard or change the direction of the flow of water or catch or collect debris carried by such water; outdoor storage of materials which are buoyant, flammable or explosive; and on-site sewage disposal systems.
(4)
Prior to any proposed alteration or relocation of any stream or any watercourse, etc., within the Township, a permit shall be obtained from the Department of Environmental Protection, Dams and Encroachment Division, as specified in the Dam Safety and Encroachment Act, as amended.[1] Further, notification of the proposal shall be given to all affected adjacent municipalities. Copies of such notifications shall be forwarded to both the Federal Insurance Administration and the Department of Community and Economic Development.
(a)
Under no circumstances shall any use, activity and/or development adversely affect the capacity of the channels or floodways of any watercourse, drainage ditch or any other drainage facility or system.
[1]
Editor's Note: See 32 P.S. § 693.1 et seq.
D.
Zoning Permit. Prior to the issuance of any zoning permit, the Zoning 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[2]); the Pennsylvania Dam Safety and Encroachments Act (Act 1978-325, as amended[3]); the Pennsylvania Clean Streams Act (Act 1937-394, as amended[4]); and the U.S. Clean Water Act, Section 404, 33 U.S.C. § 1344. No permit shall be issued until this determination has been made.
E.
Land Development Plan Review. Any applicant for a zoning permit who is engaging in land development (as that term is defined in Chapter 22, Subdivision and Land Development) within a floodplain or 100 feet therefrom shall submit, along with the application, a land development plan as required in Part 10 of this chapter.
F.
Conditional Use. Local alluvial soils, while not always displaying all of the characteristics common to alluvial soils, may be subject to periodic inundation or flooding. For this reason they shall be considered an integral part of the floodplain network. However, they may be exempted from the provisions of this section when it is determined that, by use of proper engineering and conservation practices, such conditional use will not have the effect of nullifying the intent of this section and they are not within a watercourse, drainageway channel or stream, or within the floodplain area of the Flood Insurance Rate Map for Ferguson Township as prepared by the Federal Insurance Administration. A conditional use may be a use as permitted by the existing Township zoning district, where the soils are found as previously listed and a floodplain does not exist.
(1)
(2)
Make sure that a conditional use shall involve only the least modification necessary to provide relief.
(a)
Attach whatever reasonable conditions and safeguards it considers necessary in order to protect the public health, safety and welfare and to meet the intent of this section.
(b)
Require the applicant to comply with all applicable requirements of the National Flood Insurance Program regulations (60.3a, b and c), including the requirements for floodproofing, anchoring and elevation.
(3)
Notwithstanding the provisions of this section, no conditional use shall be granted for the following obstructions and activities if located entirely or partially within an identified floodplain area:
(a)
Hospitals (public or private).
(b)
Nursing homes (public or private).
(c)
Jails or prisons.
(d)
New manufactured home parks and manufactured home subdivisions, and substantial improvements to existing manufactured home parks.
(e)
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 which will be used for any activity requiring the maintenance of a supply (more than 550 gallons or other comparable volume or any amount of radioactive substances) of any one of the following dangerous materials or substances and 935 gallons in the aggregate on the premises:
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)
Sulfur and sulfur products.
17)
Pesticides (including insecticides, fungicides and rodenticides).
(f)
Any residential dwelling.
(5)
A report of all conditional uses granted under this section during the year shall be included in the annual report to the Federal Insurance Administration.
(6)
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.
G.
Wetlands. Areas subject to periodic inundation by floodwaters and/or occurring without flooding shall include:
(1)
All wetland locations mapped on Fish and Wildlife Service National Wetlands Inventory Maps for Ferguson Township.
(2)
Any wetlands identified by on-site field investigation that finds hydric soils and/or common wetland indicator plants.
(3)
Requirements for construction of obstructions, structures and uses affecting wetlands:
(a)
Land development plans are to contain boundaries of any wetlands, existing vegetation cover and location of existing soils.
(b)
Soils having severe limitations due to wetness for crops, leach fields, buildings or roads are possible wetlands and require Pennsylvania Department of Environmental Protection and U.S. Army Corps of Engineers review and approval of permits.
(c)
Upon the approval by the Department of Environmental Protection and Corps of Engineers of required permits for the land development in the identified wetland areas, the land development plan and/or subdivision plan may then be submitted to the Township for review and approval.
(d)
The Township procedures of approval may have conditions attached as needed to further the goal of prohibiting development in floodplains and wetlands.
H.
Floodways. No activity, land development, structure, building or obstruction shall be permitted within an identified floodway portion of the floodplain district.
I.
Use Buffer. A land buffer remaining in its natural condition shall be not less than 100 feet separating the permitted use from the edge of the top of the bank of the watercourse. The 100-foot distance is to start from the outermost edge of the watercourse measured in a perpendicular direction to the approved use. A fifty-foot land buffer remaining in its natural condition shall be provided between the permitted use and the edge of the floodplain as defined by FEMA.
J.
Variances.
(1)
Any variances granted by the Zoning Hearing Board to any of the floodplain conservation regulations of this section shall be subject to the same standards and requirements as applied to the granting of conditional uses in § 27-701, Subsection 3F.
(2)
In addition to meeting the requirements of § 27-701, Subsection 3E, whenever a variance is granted, the Township shall notify the applicant, in writing, that the granting of the variance may result in increased premium rates for flood insurance and may increase the risks to life and property.
(3)
No variance shall be granted for any construction, development, use or activity within any floodway area that would cause any increase in the 100-year-flood elevation.
(4)
No variance shall be granted for any construction, development, use or activity within the floodplain area that would, together with all other existing and anticipated development, increase the 100-year-flood elevation more than one foot at any point.
K.
Abrogation and Greater Restrictions. This section supersedes any other conflicting provisions which 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.












