Borough of Interlaken, NJ Flood Hazard Prevention

The legislature of the State of New Jersey has in N.J.S.A. 40:48-1 et seq. delegated the responsibility to local government units to adopt regulations designed to promote the public health, safety, and general welfare of its citizenry.

§ 24-1.2 Findings of Fact.

[Ord. No. 224 § 1.2; Ord. No. 2009-7 § 2]

The flood hazard area of the Borough may be subject to inundation resulting in loss of life and property, health and safety hazards, disruption of government services, extraordinary public expenditures for flood protection and relief, and impairment of the tax base, all of which would adversely affect the public health, safety and general welfare. These flood losses are caused by the cumulative effect of obstructions in areas of special flood hazard which increase flood heights and velocities, and when inadequately anchored, causes damages in other areas. Uses that are inadequately floodproofed, elevated or otherwise protected from flood damage also contribute to the flood loss.

§ 24-1.3 Statement of Purpose.

[Ord. No. 224 § 1.3; Ord. No. 2009-7 § 3]

It is the purpose of this chapter to promote the public health, safety and general welfare, and to minimize public and private losses due to flood conditions in specific areas by provisions designed:

To protect human life and health;

To minimize expenditure of public money for costly flood control projects;

To minimize the need for rescue and relief efforts associated with flooding and generally undertaken at the expense of the general public;

To minimize prolonged business interruptions;

To minimize damage to public facilities and utilities such as water and gas mains, electric, telephone, and sewer lines, and streets and bridges located in areas of special flood hazard;

To help maintain a stable tax base by providing for the second use and development of areas of special flood hazard so as to minimize future flood blight areas;

To insure that potential buyers are notified that property is in an area of special flood hazard; and

To ensure that those who occupy the areas of special flood hazard assume responsibility for their actions.

§ 24-1.4 Methods of Reducing Flood Losses.

[Ord. No. 224 § 1.4]

In order to accomplish its purpose, this chapter includes methods and provisions for:

Restricting or prohibiting uses which are dangerous to health, safety and property due to the water or erosion hazards, or which result in damaging increases in erosion or in flood heights velocities;

Requiring that the uses vulnerable to floods, including facilities which service such uses, be protected against flood damage at the time of initial construction;

Controlling the alteration of natural flood plains, stream channels, and natural protective barriers, which help accommodate or channel flood waters;

Controlling filling, grading, dredging and other development which may increase flood damage; and

Preventing or regulating the construction of flood barriers which will unnaturally divert flood waters or which may increase flood hazards in other areas.

§ 24-2 DEFINITIONS.

[Ord. No. 224 § 2.0; Ord. No. 230 § 1; Ord. No. 2009-7 § 4]

Unless specifically defined below, words or phrases used in this chapter shall be interpreted so as to give them the meaning they have in common usage and to give this chapter its most reasonable application.

APPEAL: Shall mean a request for review of the Construction Official's interpretation of any provision of this chapter or a request for a variance.

AREA OF SHALLOW FLOODING: Shall mean a designated AO, AH, or VO zone on a community's Digital Flood Insurance Rate Map (DFIRM) with a 1% annual or greater chance of flooding to an average depth of one to three feet where a clearly defined channel does not exist, where the path of flooding is unpredictable and where velocity flow may be evident. Such flooding is characterized by ponding or sheet flow.

AREA OF SPECIAL FLOOD HAZARD: Shall mean the land in the flood plain within a community subject to 1% or greater chance of flooding in any given year.

BASE FLOOD: Shall mean the flood having a 1% chance of being equaled or exceeded in any given year.

BASEMENT: Shall mean any area of the building having its floor subgrade (below ground level) on all sides.

BREAKAWAY WALL: Shall mean a wall that is not part of the structural support of the building and is intended through its design and construction to collapse under specific lateral loading forces without causing damage to the elevated portion of the building or supporting foundation system.

DEVELOPMENT: Shall mean any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures, mining, dredging, filling, grading, paving, excavation or drilling operations, or storage of equipment or materials located within the area of special flood hazard.

DIGITAL FLOOD INSURANCE RATE MAP (DFIRM): Shall mean the official map on which the Federal Insurance Administration has delineated both the areas of special flood hazards and the risk premium zones applicable to the community.

ELEVATED BUILDING: Shall mean a nonbasement building (i) built in the case of a building in an area of special flood hazard to have the top of the elevated floor elevated above the ground level by means of piling, columns (posts and piers), or shear walls parallel to the flow of the water, and (ii) adequately anchored so as to not impair the structural integrity of the building during a flood up to the magnitude of the base flood. In an area of special flood hazard "elevated building" also includes a building elevated by means of fill or solid foundation perimeter walls with openings sufficient to facilitate the unimpeded movement of flood waters.

FLOOD OR FLOODING: Shall mean a general and temporary condition or partial or complete inundation of normally dry land areas from:

FLOOD INSURANCE RATE MAP (FIRM): Shall mean the official map on which the Federal Insurance Administration has delineated both the areas of special flood hazards and the risk premium zones applicable to the community.

FLOOD INSURANCE STUDY (FIS): Shall mean the official report in which the Federal Insurance Administration has provided flood profiles, as well as the Flood Insurance Rate Map(s) and the water surface elevation of the base flood.

FLOOD PLAIN MANAGEMENT REGULATIONS: Shall mean zoning ordinances, subdivision regulations, building codes, health regulations, special purpose ordinances (such as a flood plain ordinance, grading ordinance and erosion control ordinance) and other applications of police power. The term describes such State or local regulations, in any combination thereof, which provide standards for the purpose of flood damage prevention and reduction.

FLOODWAY: Shall mean the channel of river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more that 0.2 foot.

HIGHEST ADJACENT GRADE: Shall mean the highest natural elevation of the ground surface prior to construction next to the proposed walls of a structure.

HISTORIC STRUCTURE: Shall mean any structure that is:

LOWEST FLOOR: Shall mean the lowest level (including basement, crawl space and garage) of the lowest enclosed area. An unfinished or flood resistant enclosure, suitable solely for the parking of vehicles, building access or storage in an area other than a basement is not considered a building's lowest floor provided that such enclosure is not built so to render the structure in violation of other applicable nonelevation design requirements.

MANUFACTURED HOME: Shall mean a structure, transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when attached to the required utilities. The term "manufactured home" does not include a "recreational vehicle."

MANUFACTURED HOME PARK OR MANUFACTURED HOME SUBDIVISION: Shall mean a parcel (or contiguous parcels) of land divided into two or more manufactured home lots for rent or sale.

NEW CONSTRUCTION: Shall mean structures for which the start of construction commenced on or after the effective date of a floodplain regulation adopted by a community and includes any subsequent improvements to such structures.

NEW MANUFACTURED HOME PARK OR SUBDIVISION: Shall mean a manufactured home park or subdivision for which the construction of facilities for servicing the lots on which the manufactured homes are to be affixed (including at a minimum, the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads) is completed on or after the effective date of the flood plain management regulations adopted by the municipality.

RECREATIONAL VEHICLE: Shall mean a vehicle which is [i] built on a single chassis; [ii] 400 square feet or less when measured at the longest horizontal projections; [iii] designed to be self-propelled or permanently towable by a light duty truck; and [iv] designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel, or seasonal use.

START OF CONSTRUCTION: For other than new construction or substantial improvements under the Coastal Barrier Resources Act (P.L. No. 97-348) includes substantial improvements and means the date the building permit was issued, provided the actual start of construction, repair, reconstruction, rehabilitation, addition, placement, or other improvement was within 180 days of the permit date. The actual start means either the first placement of permanent construction of a structure on a site such as the pouring of a slab or footings, the installation of piles, 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 or 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.

STRUCTURE: Shall mean a walled and roofed building, a manufactured home, or a gas or liquid storage tank, that is principally above ground.

SUBSTANTIAL DAMAGE: Shall mean damage of any origin sustained by a structure whereby the cost of restoring the structure to its before damaged condition would equal or exceed 50% of the market value of the structure before the damage occurred.

SUBSTANTIAL IMPROVEMENT: Shall mean any reconstruction, rehabilitation, addition, or other improvement of a structure, the cost of which exceeds 50% of the market value of the structure before the "start of construction" of the improvement. This term includes structures which have incurred "substantial damage" regardless of the actual repair work performed. The term does not include either:

VARIANCE: Shall mean a grant of relief from the requirements of this chapter that permits construction in a manner that would otherwise be prohibited by this chapter.

§ 24-3 GENERAL PROVISIONS.

§ 24-3.1 Lands to Which This Chapter Applies.

[Ord. No. 224 § 3.1]

This chapter shall apply to all areas of special flood hazards within the jurisdiction of the Borough of Interlaken.

§ 24-3.2 Basis for Establishing the Areas of Special Flood Hazard.

[Ord. No. 224 § 3.2; Ord. No. 2009-7 § 5]

The areas of special flood hazard for the Borough of Interlaken, Community No. 340302, are identified and defined on the following documents prepared by the Federal Emergency Management Agency:

A scientific and engineering report "Flood Insurance Study, Monmouth County, New Jersey."

Flood Insurance Rate Map for Monmouth County, New Jersey (All Jurisdictions) as shown on Index and panel numbers 34025CO332F; whose effective date is September 25, 2009.

§ 24-3.3 Penalties for Noncompliance.

[Ord. No. 224 § 3.3; New]

No structure or land shall hereafter be constructed, located, extended, converted or altered without full compliance with the terms of this chapter and other applicable regulations. Violation of the provisions of this chapter by failure to comply with any of its requirements (including violations of conditions and safeguards established in connection with conditions) shall constitute a misdemeanor. Any person who violates this chapter or fails to comply with any of its requirements shall, upon conviction, be liable to the penalty stated in Chapter 1, Section 1-5 and, in addition shall pay all costs and expenses involved in the case. Nothing herein contained shall prevent the Borough from taking such other lawful action as is necessary to prevent or remedy any violation.

§ 24-3.4 Abrogation and Greater Restrictions.

[Ord. No. 224 § 3.4]

This chapter is not intended to repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. However, where this chapter and another ordinance, easement, covenant or deed restriction conflict or overlap, whichever imposes the more stringent restrictions shall prevail.

§ 24-3.5 Interpretation.

[Ord. No. 224 § 3.5]

In the interpretation and application of this chapter, all provisions shall be:

Considered as minimum requirements;

Liberally construed in favor of the Governing Body; and

Deemed neither to limit nor repeat any other powers granted under State Statutes.

§ 24-3.6 Warning and Disclaimer of Liability.

[Ord. No. 224 § 3.6]

The degree of flood protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific and engineering considerations. Larger floods can and will occur on rare occasions. Flood heights may be increased by man-made or natural causes. This chapter does not imply that land outside the areas of special flood hazards or uses permitted within such areas will be free from flooding or flood damages. This chapter shall not create liability on the part of the Borough, any officer or employee thereof or the Federal Insurance Administration, for any flood damages that result from reliance on this chapter or any administrative decision lawfully made thereunder.

§ 24-4 ADMINISTRATION.

§ 24-4.1 Development Permit Required.

[Ord. No. 224 § 4.1]

A Development Permit shall be obtained before construction or development begins within any area of special flood hazard established in subsection 24-3.2. Application for a Development Permit shall be made on forms furnished by the Borough Clerk and may include, but not be limited to: plans in duplicate drawn to scale showing the nature, location, dimensions, and elevations of the area in question; existing or proposed structures, fill, storage of materials, drainage facilities, and the location of the foregoing.

Specifically, the following information is required:

Elevation in relation to mean sea level, of the lowest floor (including basement) of all structures;

Elevation in relation to mean sea level to which any structure has been floodproofed;

Certification by a registered professional engineer or architect that the floodproofing methods for any nonresidential structure meet the floodproofing criteria in subsection 24-5.2; and

Description of the extent to which any watercourse will be altered or relocated as a result of proposed development.

§ 24-4.2 Designation of the Borough Construction Official.

[Ord. No. 224 § 4.2]

The Borough Construction Official is hereby appointed to administer and implement this chapter by granting or denying development permit applications in accordance with its provisions.

§ 24-4.3 Duties and Responsibilities of the Borough Construction Official.

[Ord. No. 224 §§ 4-3—4.3.5; Ord. No. 2009-7 §§ 6—10]

Duties of Construction Official. Duties of the Borough Construction Official shall include, but not be limited to:

Permit Review.

(a)

Review all development permits to determine that the permit requirements of this chapter have been satisfied.

(b)

Review all Development Permits to determine that all necessary permits have been obtained from those Federal, State or local governmental agencies from which prior approval is required.

(c)

Review all development permits to determine if the proposed development adversely affects the flood carrying capacity of the areas of special flood hazard. For the purposes of this chapter, "adversely affects" means damage to adjacent properties because of rises in flood stages attributed to damage to physical changes of the channel and the adjacent overbank areas.

(1)

If it is determined that there is no adverse effect, then the permit shall be granted consistent with the provisions of this chapter.

(2)

If it is determined that there is no adverse effect, then flood damage mitigation measures shall be made a condition of the permit.

(3)

Review all development permits to determine if the proposed development is located in the floodway, assure that the encroachment provisions of subsection 24-5.1e are met.

Use of Other Base Flood Data. When base flood elevation and floodway data has not been provided in accordance with subsection 24-3.2, Basis for Establishing the Areas of Special Flood Hazard, the (local administrator) shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a Federal, State or other source, in order to administer subsections 24-5.2a and 24-5.2b, Specific Standards.

Information to Be Obtained and Maintained.

Obtain and record the actual elevation (in relation to mean sea level) of the lowest floor (including basement) of all new or substantially improved structures, and whether or not the structure contains a basement.

For all new or substantially improved floodproofed structures:

(a)

Obtain and record the actual elevation (in relation to mean sea level) to which the structure has been floodproofed.

(b)

Maintain the floodproofing certifications required in subsection 24-4.1b3.

Maintain for public inspection all records pertaining to the provisions of this chapter.

Alteration of Watercourses.

Notify adjacent communities and the New Jersey Department of Environmental Protection, Dam Safety and Flood Control Section and the Land Use Regulation Program prior to any alteration or relocation of a watercourse, and submit evidence of such notification to the Federal Insurance Administration.

Require that maintenance is provided within the altered or relocated portion of the watercourse so that the flood carrying capacity is not diminished.

Interpretation of FIRM Boundaries. Make interpretations where needed, as to the exact location of the boundaries of the areas of special flood hazards (for example where there appears to be a conflict between a mapped boundary and actual field conditions).

§ 24-5 PROVISIONS FOR FLOOD HAZARD REDUCTION.

§ 24-5.1 General Standards.

[Ord. No. 224 § 5.1.5; Ord. No. 2009-7 §§ 11—13]

In all areas of special flood hazards the following standards are required:

Anchoring.

All new construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement of the structure.

All manufactured homes shall be anchored to resist flotation, collapse or lateral movement. Methods of anchoring may include, but are not limited to, use of over-the-top or frame ties to ground anchors. This requirement is in addition to applicable State and local anchoring requirements for resisting wind forces.

Construction Materials and Methods.

All new construction and substantial improvements shall be constructed with materials and utility resistant to flood damage.

All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damage.

Utilities.

All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system;

New and replacement sanitary sewerage systems shall be designed to minimize or eliminate infiltration of flood waters into the system and discharge from the system into the floodwaters.

On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.

Electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities shall be designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.

Subdivision Proposals.

All subdivision proposals shall be consistent with the need to minimize flood damage.

All subdivision proposals shall have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize flood damage.

All subdivision proposals shall have adequate drainage provided to reduce exposure for flood damage.

Base flood elevation data shall be provided for subdivision proposals and other proposed development which contain at least 50 lots or five acres (whichever is less).

Encroachments. Any proposed development shall be analyzed to determine effects on flood carrying capacity of the area of special flood hazard as set forth in subsection 24-4.3a1(c), Permit Review. Encroachments, including fill, new construction, substantial improvements, and other development shall be prohibited in any floodway unless a technical evaluation demonstrates that the encroachments will not result in any increase in the flood levels during the occurrence of the base flood discharge.

Enclosure Openings. All new construction and substantial improvements having fully enclosed areas below the lowest floor that are usable solely for parking of vehicles, building access or storage in an area other than a basement and which are subject to flooding, shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or must meet or exceed the following minimum criteria: A minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, or other covering or devices provided that they permit the automatic entry and exit of floodwaters.

§ 24-5.2 Specific Standards.

[Ord. No. 224 § 5.2.1; Ord. No. 2009-7 § 14]

In all areas of special flood hazards where base flood elevation data have been provided as set forth in subsection 24-3.2 entitled "Basis for Establishing the Areas of Special Flood Hazard" or in subsection 24-4.3b entitled, "Use of Other Base Flood Data", the following standards are required:

Residential Construction.

New construction and substantial improvement of any residential structure shall have the lowest floor, including basement together with the attendant utilities and sanitary facilities, elevated to or above base flood elevation;

Within any AO zone on the municipality's FIRM that all new construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet (at least two feet if no depth number is specified). And, require adequate drainage paths around structures on slopes to guide floodwaters around and away from proposed structures.

Nonresidential Construction.

New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall have the lowest floor, including basement, elevated to the level of the base flood elevation; and

Within any AO zone on the municipality's DFIRM that all new construction and substantial improvement of any commercial structure, industrial or other nonresidential structure shall have the lowest floor, including basement, elevated above the highest adjacent grade at least as high as the depth number specified in feet (at least two feet if no depth number is specified). And, require adequate drainage paths around structures on slopes to guide floodwaters around and away from proposed structures; or

(a)

To be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;

(b)

Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and

(c)

Be certified by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards or practice for meeting the applicable provisions of this subsection. Such certification shall be provided to the official as set forth in subsection 24-4.1c2.

Manufactured Homes.

Manufactured homes shall be anchored in accordance with subsection 24-5.1a2.

All manufactured homes to be placed or substantial improved within an area of special flood hazard shall be elevated on a permanent foundation such that the top of the lowest floor is at or above the base flood elevation.

Floodways. Located within areas of special flood hazard established in subsection 24-3.2 are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles, and erosion potential, the following provisions apply:

Prohibit encroachments, including fill, new construction, substantial improvements, and other development unless a technical evaluation demonstrates that encroachment shall not result in any increase in flood levels during the occurrence of the base flood discharge.

If subparagraph 1 above is satisfied, all new construction and substantial improvements must comply with Section 24-5 entitled, "Provisions for Flood Hazard Reduction."

In all areas of special flood hazard in which base flood elevation data has been provided and no floodway has been designated, the cumulative effect of any proposed development, when combined with all other existing and anticipated development, shall not increase the water surface elevation of the base flood more than 0.2 of a foot at any point.

§ 24-6 VARIANCE PROCEDURE.

§ 24-6.1 Appeal Board.

[Ord. No. 2009-7 § 15]

The Appeal Board as established by the Borough of Interlaken shall hear and decide appeals and requests for variances from the requirements of this chapter. The Planning Board of the Borough of Interlaken is hereby designated as the Appeal Board for purposes of this chapter.

The Appeal Board shall hear and decide appeals when it is alleged there is an error in any requirement, decision, or determination made by the Construction Official in the enforcement or administration of this chapter.

Those aggrieved by the decision of the Appeal Board, or any taxpayer, may appeal such decision to the Monmouth County Superior Court.

In passing upon such applications, the Appeal Board shall consider all technical evaluations, all relevant factors; standards specified in other sections of this chapter, and:

The danger that materials may be swept onto other lands to the injury of others;

The danger to life and property due to flooding or erosion damage;

The susceptibility of the proposed facility and its contents to flood damage and the effect of such damage on the individual owner;

The importance of the services provided by the proposed facility to the community;

The necessity to the facility of a waterfront location, where applicable;

The availability of alternative locations for the proposed use which are not subject to flooding or erosion damage;

The compatibility of the use with existing and anticipated development;

The relationship of the proposed use to the comprehensive plan and flood plain management program of that area;

The expected heights, velocity, duration, rate of rise, and sediment transport of the flood waters and the effects of wave action, if applicable, expected at the site; and

10.

The costs of providing governmental services during and after flood conditions, including maintenance and repair of public utilities and facilities such as sewer, gas, electrical, and water systems, and streets and bridges.

Upon consideration of the above factors and the purposes of this chapter, the Appeal Board may attach such conditions to the granting of variances as it deems necessary to further the purposes of this chapter.

The Construction Official shall maintain the records of all appeal actions, including technical information, and report any variances to the Federal Insurance Administration upon request.

§ 24-6.2 Conditions for Variances.

[Ord. No. 2009-7 § 15]

Generally, variances may be issued, for new construction and substantial improvements to be erected on a lot of 1/2 acre or less in size contiguous to and surrounded by lots with existing structures constructed below the base flood level, providing items in subsection 24-6.1d1—9 have been fully considered. As the lot size increases beyond the 1/2 acre, the technical justification required for issuing the variance increases.

Variances may be issued for the repair or rehabilitation of historic structures upon a determination that the proposed repair or rehabilitation will not preclude the structure's continued designation as a historic structure and the variance is the minimum necessary to preserve the historic character and design of the structure.

Variances shall not be issued within any designated floodway if any increase in flood levels during the base flood hazard, to afford relief.

Variances shall only be issued upon a determination that the variance is the minimum necessary, considering the flood hazard, to afford relief.

Variances shall only be issued upon:

A showing of good and sufficient cause;

A determination that failure to grant the variance would result in exceptional hardship to the applicant; and

A determination that the granting of a variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public as identified in subsection 24-6.1d, or conflict with existing local laws or ordinances.

Any applicant to whom a variance is granted shall be given written notice that the structure will be permitted to be built with a lowest floor elevation below the base flood elevation and that the cost of the flood insurance will be commensurate with the increased risk resulting from the reduced lowest floor elevation.