[Amended 6-6-2022 ATM by Art. 22]
9.1.1.
Purpose. The Flood Plain Overlay District (FPOD) has been established to provide that lands in the Town subject to seasonal or periodic flooding shall not be used for residential or other purposes in such a manner as to endanger the health or safety of the occupants thereof, or of the public, and to assure the continuation of the natural flow pattern of the watercourses within the Town in order to provide adequate and safe floodwater storage capacity to protect persons and property against the hazards of flood inundation. It is further intended to protect, preserve and maintain the water table and water recharge areas within the Town so as to preserve present and potential water supplies for the public health and safety of the residents of the Town.
9.1.2.
Definitions. Pertinent definitions of flood zones delineated in Great Barrington (e.g., Zone A, Zone A1-30, etc.) may be found in the US Code of Federal Regulations, Title 44, Part 64.3. Additional terms applicable to the FPOD are found in Section 11 of this bylaw and US Code of Federal Regulations, Title 44, Part 59.
9.1.3.
Location. The general boundaries of the FPOD are shown on the Great Barrington Flood Insurance Rate Map (FIRM), dated July 19, 1982, as Zones A and A-1-30 to indicate the 100-year floodplain. The exact boundaries of the district are defined by the flood profiles contained in the Flood Insurance Study, dated July 19, 1982. The floodway boundaries are delineated on the Great Barrington Flood Boundary and Floodway Maps (FBFM), dated July 19, 1982, and further defined by the floodway data tables contained in the Flood Insurance Study. These two maps, as well as the accompanying study, are incorporated in this bylaw by reference and are on file with the Town Clerk, Planning Board, Inspector of Buildings and Board of Health. In A Zones, in the absence of FEMA base flood elevation data and floodway data, the Building Department will obtain, review and reasonably utilize base flood elevation and floodway data available from a federal, state, or other source as criteria for requiring new construction, substantial improvements, or other development in Zone A to comply with one or more of the following: elevating residential structures to or above base flood level; floodproofing or elevating nonresidential structures to or above base flood level; and prohibiting encroachments in floodways. The two above-referenced maps and related study cover specifically the Housatonic River, Green River, Williams River and Alford Brook and related wetlands. There are other inland wetlands that are covered and are shown generally on a map prepared by Robert G. Brown and Associates, Inc., and entitled "Delineation and Description of the Green, Williams and Housatonic River Flood Plain and the Inland Wetlands in the Town of Great Barrington, Massachusetts," dated 1974. In cases of conflict between the Robert G. Brown and Associates, Inc., and FIRM and FBFM maps, the latter two maps shall govern.
9.1.4.
Floodways. All encroachments, including fill, new construction, substantial improvements to existing structures and other developments in the floodway are prohibited unless certification by a professional engineer registered and licensed in the Commonwealth of Massachusetts is provided by the applicant demonstrating that such encroachment shall not result in any increase in flood levels during the occurrence of the 100-year flood. Any encroachment meeting the above standard shall comply with the floodplain requirements of the State Building Code. In A Zones along watercourses that have not had a regulatory floodway designated, the best available federal, state, local, or other floodway data shall be used to prohibit encroachments in floodways which would result in any increase in flood levels within the community during the occurrence of the base flood discharge.
9.1.5.
Special permit required. Any person desiring to establish any permitted use in a FPOD involving or requiring the erection of new structures and/or alteration or moving of existing structures or dumping, filling, transfer, relocation or excavation of earth materials or storage of materials or equipment, or parking of recreational vehicles, shall submit an application for a special permit to the special permit granting authority (SPGA) in accordance with the provisions of Section 10.4. The Selectboard shall be the SPGA for floodplain special permits. Such special permit application shall describe in detail the proposed use of the property and the work to be performed and shall be accompanied by plans as specified therein. In addition to the information required thereby, such plans shall also include boundaries and dimensions of the lot, existing and proposed drainage easements, all existing and proposed fill, existing and proposed sewage disposal facilities, means of access and mean sea-level elevation, with contour separation of two feet or less, of the existing and proposed land surface, cellar floor and first floor. All plans shall be prepared and certified by a professional engineer registered and licensed in the Commonwealth of Massachusetts. The special permit application shall include a checklist of all local, state and federal permits that will be necessary in order to carry out the proposed development in the FPOD. The applicant must acquire all necessary permits, and must submit the completed checklist demonstrating that all necessary permits have been acquired prior to issuance of any permit by the Building Inspector.
9.1.6.
Decision. The SPGA may issue a special permit in compliance with all applicable provisions of this bylaw, for establishment or alteration of a permitted use in a FPOD, provided that the SPGA determines the following. Such findings shall be in addition to the findings required by Section 10.4.
1.
The use would otherwise be permitted if such land were not, by operation of this section, in the FPOD;
2.
The use of such land for the proposed purpose will not interfere with the general purpose for which such FPODs have been established;
3.
That the floor level of areas to be occupied by human beings as living or working space shall be at an elevation in accordance with the State Building Code;
4.
That furnaces and utilities are protected from the effects of flooding and that the structure will withstand the effects of flooding in accordance with the State Building Code;
5.
That the proposed construction, use or change of grade will not obstruct or divert the flood flow, reduce natural water storage or increase stormwater runoff so that water levels on other land are substantially raised or danger from flooding increased;
6.
That safe vehicular and pedestrian movement to, over and from the premises is provided in the event of flooding; and
7.
That the proposed methods of drainage and sewage disposal are approved by the Board of Health and will not cause pollution or otherwise endanger health in the event of flooding.
8.
If Zones AO and AH exist on the applicable FIRM, that adequate drainage paths are provided around structures on slopes, to guide floodwaters around and away from proposed structures.
9.1.7.
Conditions. Special permits issued under this section may be subject to such conditions as the SPGA deems necessary in the interests of the public health, safety and welfare. The burden of proving that the proposed use will not endanger the health and safety of the occupants or the public shall rest upon the applicant, who shall provide such engineering, ecological and hydrological data as may be required by the SPGA or any state or federal agency.
9.1.8.
Subdivisions. All subdivision proposals and development proposals for property in the Floodplain Overlay District shall be reviewed to assure that: 1) such proposals minimize flood damage; 2) public utilities and facilities are located and constructed so as to minimize flood damage; and 3) adequate drainage is provided. When proposing subdivisions or other developments greater than 50 lots or five acres (whichever is less), the proponent must provide technical data to determine base flood elevations for each developable parcel shown on the design plans.
9.1.9.
Recreational vehicles. If otherwise permitted in accordance with this Zoning Bylaw, in A1-30, AH, AE Zones, V1-30, VE, and V Zones, all recreational vehicles to be placed on a site must be elevated and anchored in accordance with the zone's regulations for foundation and elevation requirements, or be on the site for less than 180 consecutive days, or be fully licensed and highway ready.
9.1.10.
Community Floodplain Administrator. The Town of Great Barrington hereby designates the Building Inspector to be the official Floodplain Administrator for the Town.
9.1.11.
Variances from Building Code floodplain standards. Should a proponent be granted a Building Code variance by the commonwealth, the proponent shall notify the Building Inspector in writing, and the Town will request from the State Building Code Appeals Board a written and/or audible copy of the portion of the hearing related to the variance, and will maintain this record in the Town's files. The Town shall also issue a letter to the property owner regarding potential impacts to the annual premiums for the flood insurance policy covering that property, in writing over the signature of a Town official that i) the issuance of a variance to construct a structure below the base flood level will result in increased premium rates for flood insurance up to amounts as high as $25 for $100 of insurance coverage and ii) such construction below the base flood level increases risks to life and property. Such notification shall be maintained with the record of all variance actions for the referenced development in the Floodplain Overlay District.
9.1.12.
Variances from Zoning Bylaw related to community compliance with the National Flood Insurance Program (NFIP). The Zoning Board of Appeals may issue a variance from the requirements of the Floodplain Overlay District in accordance with the requirements set out by state law, and a variance may only be granted if:
9.1.13.
Limitations. The floodplain management regulations found in this section shall take precedence over any less restrictive conflicting local laws, ordinances or codes. The degree of flood protection required by this bylaw is considered reasonable by the Town but does not imply total flood protection. Granting of a special permit under this section by the Selectboard does not in any way indicate compliance with the provisions of the Wetlands Protection Act, MGL c. 131, § 40, which provides, among other things, that no person shall remove, fill, dredge or alter any swamp, creek, river, stream, pond or lake or any land subject to flooding, except with a written permit from the Conservation Commission.
9.1.14.
Watercourse alterations and new data.
1.
In a riverine situation, the Building Inspector shall notify the following of any alteration or relocation of a watercourse:
a.
Adjacent communities, especially upstream and downstream.
b.
Bordering states, if affected.
c.
NFIP State Coordinator, Massachusetts Department of Conservation and Recreation, 251 Causeway Street, 8th Floor, Boston, MA 02114.
d.
NFIP Program Specialist, Federal Emergency Management Agency, Region I, 99 High Street, 6th Floor, Boston, MA 02110.
2.
If the Town acquires data that changes the base flood elevation in the FEMA mapped special flood hazard areas, the Town will, within six months, notify FEMA of these changes by submitting the technical or scientific data that supports the change(s).