§ 21-14. General standards.

The following standards apply to new development, including new and substantially improved structures, in the areas of special flood hazard shown on the Flood Insurance Rate Map designated in § 21-6.

A. 

Coastal high-hazard areas. The following requirements apply within Zones V1-V30, VE and V or in an area of moderate wave action:

(1) 

All new construction, including manufactured homes and recreational vehicles on site 180 days or longer and not fully licensed for highway use, shall be located landward of the reach of high tide.

(2) 

The use of fill for structural support of buildings, manufactured homes or recreational vehicles on site 180 days or longer is prohibited.

(3) 

Man-made alteration of sand dunes which would increase potential flood damage is prohibited.

B. 

Subdivision proposals. The following standards apply to all new subdivision proposals and other proposed development in areas of special flood hazard (including proposals for manufactured home and recreational vehicle parks and subdivisions):

(1) 

Proposals shall be consistent with the need to minimize flood damage;

(2) 

Public utilities and facilities such as sewer, gas, electrical and water systems shall be located and constructed so as to minimize flood damage; and

(3) 

Adequate drainage shall be provided to reduce exposure to flood damage.

C. 

Encroachments.

(1) 

Within Zones A1-A30 and AE, on streams without a regulatory floodway, no new construction, substantial improvements or other development (including fill) shall be permitted unless:

(a) 

The applicant demonstrates that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood more than one foot at any location; or

(b) 

The Town of North Hempstead agrees to apply to the Federal Emergency Management Agency (FEMA) for a conditional FIRM revision, FEMA approval is received and the applicant provides all necessary data, analyses and mapping and reimburses the Town of North Hempstead for all fees and other costs in relation to the application. The applicant must also provide all data, analyses and mapping and reimburse the Town of North Hempstead for all costs related to the final map revision.

(2) 

On streams with a regulatory floodway, as shown on the Flood Boundary and Floodway Map, or the Flood Insurance Rate Map adopted in § 21-6, no new construction, substantial improvements or other development in the floodway (including fill) shall be permitted unless:

(a) 

A technical evaluation by a licensed professional engineer shows that such an encroachment shall not result in any increase in flood levels during occurrence of the base flood; or

(b) 

The Town of North Hempstead agrees to apply to the Federal Emergency Management Agency (FEMA) for a conditional FIRM and floodway revision, FEMA approval is received and the applicant provides all necessary data, analyses and mapping and reimburses the Town of North Hempstead for all fees and other costs in relation to the application. The applicant must also provide all data, analyses and mapping and reimburse the Town of North Hempstead for all costs related to the final map revisions.

(3) 

Wherever any portion of a floodplain is authorized for development, the volume of space occupied by the authorized fill or structure below the base flood elevation shall be compensated for and balanced by a hydraulically equivalent volume of excavation taken from below the base flood elevation at or adjacent to the development site. All such excavations shall be constructed to drain freely to the watercourse. No area below the waterline of a pond or other body of water can be credited as compensating excavation.