In all areas of special flood hazard, the following provisions shall apply:
A. 
New construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.
B. 
New construction and substantial improvements shall be constructed with materials resistant to flood damage.
C. 
New construction or substantial improvements shall be constructed by methods and practices that minimize flood damage.
D. 
Electrical, heating, ventilation, plumbing, 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.
E. 
New and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the system.
F. 
New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the systems and discharges from the system into floodwaters.
G. 
On-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding.
H. 
In any portion of a watercourse which is altered or relocated, the flood-carrying capacity shall be maintained.
I. 
Manufactured homes. All manufactured homes (including "mobile" homes placed on a site for 180 consecutive days or longer) to be placed or substantially improved shall be:
(1) 
Elevated so that the lowest floor is above the base flood elevation.
(2) 
Placed on a permanent foundation which itself is securely anchored and to which the structure is securely anchored so that it will resist flotation, lateral movement, and hydrostatic and hydrodynamic pressures. Anchoring may include, but not be limited to, the use of over-the-top or frame ties to ground anchors.
(3) 
Installed using methods and practices which minimize flood damage. Elevation construction standards include piling foundations placed no more than 10 feet apart, and the provision of reinforcement for piers more than six feet above ground level. Adequate access and drainage should be provided.
The Zoning Agent shall obtain, review and reasonably utilize any base flood elevation and floodway data available from a federal, state or other source, including data developed pursuant to § 202-20D of this chapter, as criteria for requiring that new construction, substantial improvements, or other development in Zone A on the community's FIRM meet the standards in § 202-19.
A. 
In A Zones where base flood elevations have been determined, but before a floodway is designated, no new construction, substantial improvement, or other development (including fill) shall be permitted which will increase base flood elevations more than one foot at any point along the watercourse when all anticipated development is considered cumulatively with the proposed development.
B. 
Should data be requested and/or provided, the Town of Willington shall adopt a regulatory floodway based on the principle that the floodway must be able to convey the waters of the base flood without increasing the water surface elevation more than one foot at any point along the watercourse.
C. 
Since the floodway is an extremely hazardous area due to the velocity of floodwaters, which carry debris and potential projectiles and have erosion potential, no encroachment, including fill, new construction, substantial improvements, and other developments, shall be permitted in a floodway unless a technical evaluation demonstrates that the encroachment will not result in any increase (0.00) in flood levels during the base flood discharge. All other floodplain district standards must also be satisfied.
[Amended 10-1-2025]
In all areas of special flood hazard A1-30, AE, and AH where base flood elevation data has been provided, the following provisions shall apply:
A. 
Residential construction. New construction or substantial improvement of any residential structure shall have the lowest floor, including basement, elevated at least one foot above the base flood elevation.
B. 
Nonresidential construction.
(1) 
New construction or substantial improvement of any commercial, industrial, or nonresidential structure located in Zones A1-30, AE and AH shall have the lowest floor, including basement, elevated at least to one foot above the level of the base flood elevation; or
(2) 
Nonresidential structures located in A Zones may be floodproofed in lieu of being elevated, provided that, together with all attendant utilities and sanitary facilities, the areas of the structure below the required elevation are watertight with walls substantially impermeable to the passage of water and use structural components having the capability of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. A licensed professional engineer or architect shall review and/or develop structural design specifications and plans for the construction and shall certify that the design and methods of construction are in accordance with acceptable standards of practice for meeting the provisions of this subsection. Such certification shall be provided to the Zoning Agent as set forth in § 202-15A(6).
(3) 
Require, for all new construction and substantial improvements, that fully enclosed areas below the lowest floor that 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 licensed professional engineer or architect or meet or exceed the following minimum criteria:
(a) 
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.
(b) 
The bottom of all openings shall be no higher than one foot above grade.
(c) 
Openings may be equipped with screens, louvers, valves, or other coverings or devices, provided that they permit the automatic entry and exit of floodwaters.