8.1.1.
Purpose.
The purposes of the Floodplain Overlay District (FPOD) are to:
[FTM Art. 4, 11/1/2021]
1.
Ensure public safety through reducing the threats to life and personal injury;
2.
Eliminate new hazards to emergency response officials;
3.
Prevent the occurrence of public emergencies resulting from water quality, contamination, and pollution due to flooding;
4.
Avoid the loss of utility services which if damaged by flooding would disrupt or shut down the utility network and impact regions of the community beyond the site of flooding;
5.
Eliminate costs associated with the response and cleanup of flooding conditions; and
6.
Reduce damage to public and private property resulting from floodwaters.
8.1.2.
Floodplain District Boundaries.
The FPOD is herein established as an overlay district. The FPOD includes all special flood hazard areas within the Town of Winchester designated as Zone A, AE, AH, AO and A99 on the Middlesex County Flood Insurance Rate Map (FIRM) dated July 8, 2025, issued by the Federal Emergency Management Agency (FEMA) for the administration of the National Flood Insurance Program (NFIP). The exact boundaries of the District shall be defined by the 100-year base flood elevations shown on the FIRM and further defined by the Middlesex County Flood Insurance Study (FIS) report dated July 8, 2025. The FIRM, and Flood Insurance Study (FIS) report are incorporated herein by reference and are on file with the Town Engineer.
[FTM Art. 4, 11/1/2021; ATM Art. 4, 4/28/2025]
8.1.3.
Abrogation and Greater Restriction.
The floodplain management regulations found in this Floodplain Overlay District section shall take precedence over any less restrictive conflicting local bylaws or regulations.
[FTM Art. 4, 11/1/2021]
8.1.4.
Disclaimer of Liability.
The degree of flood protection required by this bylaw is considered reasonable but does not imply total flood protection.
[FTM Art. 4, 11/1/2021]
8.1.5.
Severability.
If any section, provision, or portion of this bylaw is deemed to be unconstitutional or invalid by a court, the remainder of the bylaw shall be effective.
[FTM Art. 4, 11/1/2021]
8.1.6.
Designation of Community Floodplain Administrator.
The Town of Winchester hereby designates the position of Town Engineer as the official floodplain administrator for the Town.
[FTM Art. 4, 11/1/2021]
8.1.7.
Requirement to Submit New Technical Data.
If the Town acquires data that changes the base flood elevation in the FEMA mapped special flood hazard areas, the Town will, within six (6) months, notify FEMA of these changes by submitting the technical or scientific data that supports the change(s). Notification shall be submitted to the FEMA Region I Risk Analysis Branch Chief, and copy of notification to the Massachusetts NFIP State Coordinator.
[FTM Art. 4, 11/1/2021]
8.1.8.
Variances to Building Code Floodplain Standards.
If the State issues variances to the flood-resistant standards as found in the State Building Code, Winchester will use this text for local adoption:
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 community’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 community official that (1) 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 $25.00 for $100.00 of insurance coverage and (2) 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. [FTM Art. 4, 11/1/2021]
8.1.9.
Variances to Local Zoning Bylaws Related to Community Compliance with the National Flood Insurance Program (NFIP).
A variance from these floodplain by-laws must meet the requirements set out by State law, and may only be granted if: (1) good and sufficient cause and exceptional nonfinancial hardship exist; (2) the variance will not result in additional threats to public safety, extraordinary public expense, or fraud or victimization of the public; and (3) the variance is the minimum action necessary to afford relief.
[FTM Art. 4, 11/1/2021]
8.1.10.
Permits.
The Town of Winchester requires a permit for all proposed construction or other development in the Floodplain Overlay District, including new construction or changes to existing buildings, placement of manufactured homes, placement of agricultural facilities, fences, sheds, storage facilities or drilling, mining, paving, and any other development that might increase flooding or adversely impact flood risks to other properties.
[FTM Art. 4, 11/1/2021]
8.1.11.
Assure That All Necessary Permits Are Obtained.
Winchester’s permit review process includes the use of a checklist of all local, State and Federal permits that will be necessary in order to carry out the proposed development in the Floodplain Overlay District. The proponent must acquire all necessary permits, and must submit the completed checklist demonstrating that all necessary permits have been acquired.
[FTM Art. 4, 11/1/2021]
8.1.12.
Base Flood Elevation and Floodway Data.
[FTM Art. 4, 11/1/2021 (formerly 8.1.3); ATM Art. 4, 4/28/2025]
1.
Floodway Data.
In Zone A and AE, 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.
2.
Where the base flood elevations are not provided on the FIRM, the applicant shall obtain any existing base flood elevation data and it shall be reviewed by the Building Commissioner for its reasonable utilization towards meeting the elevation or floodproofing requirements, as appropriate, of the State Building Code.
8.1.13.
Floodway.
In the floodway, as shown on the Flood Boundary and Floodway Map, the following provisions shall apply:
[FTM Art. 4, 11/1/2021 (formerly 8.1.4); ATM Art. 4, 4/28/2025]
1.
In Zones A1-30 and AE, along watercourses that have a regulatory floodway designated on the Town's FIRM, encroachments are prohibited, including fill, new construction, substantial improvements, and other development within the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analyses performed in accordance with standard engineering practice that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base flood discharge.
2.
Any encroachment meeting the above standard shall comply with the floodplain requirements of the State Building Code.
8.1.14.
Floodplain.
In the floodplain designated on the Flood Insurance Rate Map as Zone A or AE, the following provisions shall apply:
[FTM Art. 4, 11/1/2021. Formerly 8.1.5]
1.
All new construction and substantial improvements to any structures must comply with the Massachusetts State Building Code, as amended, for construction within a floodplain designated as Zone A or AE on the Flood Insurance Rate Maps.
2.
Buildings meeting the requirements of Section 8.1.13 must comply with the Massachusetts State Building Code, as amended, for construction within a floodplain designated as Zone A or AE on the Flood Insurance Rate Maps or designated as being within a floodway on the Flood Insurance Rate Maps.
8.1.15.
Base Flood Elevation Data.
Base flood elevation data for each developable parcel shown on the design plans is required for subdivision proposals or other developments greater than 50 lots or five (5) acres, whichever is the lesser, within unnumbered A zones.
[FTM Art. 4, 11/1/2021. Formerly 8.1.6]
8.1.16.
Unnumbered A Zones.
In A zones, in the absence of FEMA BFE data and flood-way 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 as the basis for elevating residential structures to or above base flood level, and for prohibiting encroachments in floodways.
[FTM Art. 4, 11/1/2021]
8.1.17.
Notification of Watercourse Alteration.
The Town Engineer shall notify, in a riverine situation, the following of any alteration or relocation of a watercourse:
[FTM Art. 4, 11/1/2021. Formerly 8.1.7]
8.1.18.
Use Regulations.
[FTM Art. 4, 11/1/2021. Formerly 8.1.8]
1.
Reference to Existing Regulations. The Floodplain District is established as an overlay district to all other districts. All development in the district, including structural and nonstructural activities, whether permitted by right or by special permit must be in compliance with Chapter 131, Section 40 of the Massachusetts General Laws (known as the Massachusetts Wetlands Protection Act statute), and with the following:
a.
Section of the Massachusetts State Building Code which addresses floodplain and coastal high hazard areas (currently 780 CMR 120(G));
b.
Wetlands Protection Act Regulations, Department of Environmental Protection (DEP) (currently 310 CMR 10.00);
d.
Minimum Requirements for the Subsurface Disposal of Sanitary Sewage, DEP (currently 310 CMR 15, Title 5).
Any variances from the provisions and requirements of the above referenced State regulations may only be granted in accordance with the required variance procedures of these State regulations. |
8.1.19.
Other Use Regulations.
[FTM Art. 4, 11/1/2021. Formerly 8.1.9]
1.
Within Zones A, AE, AO, AH, and A99 on the FIRM, require adequate drainage paths around structures on slopes, to guide floodwaters around and away from proposed structures.
2.
Review all subdivision proposals to assure that: (a) such proposals minimize flood damage; (b) all public utilities and facilities are located and constructed to minimize or eliminate flood damage; and (c) adequate drainage is provided to reduce exposure to flood hazards.
3.
Existing contour intervals of site and elevations of existing structures must be included on the plan.
4.
There shall be established a “routing procedure” which will circulate or transmit one (1) copy of the development plan to the Conservation Commission, Planning Board, Board of Health, Town Engineer, and Building Commissioner for comments which will be considered by the appropriate permitting board prior to issuing applicable permits.
8.1.20.
Recreational Vehicles.
In A, A1-30, AH and AE 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.
[FTM Art. 4, 11/1/2021; ATM Art. 4, 4/28/2025]
8.1.21.
Permitted Uses.
The following uses of low flood damage potential and causing no obstructions to flood flows are encouraged provided they are permitted in the underlying district and they do not require structures, fill, or storage of materials or equipment:
[FTM Art. 4, 11/1/2021. Formerly 8.1.10]
1.
Agricultural uses such as farming, grazing, truck farming, horticulture, etc.;
2.
Forestry and nursery uses;
3.
Outdoor recreational uses, including fishing, boating, play areas, etc.;
4.
Conservation of water, plants, wildlife;
5.
Wildlife management of areas, foot, bicycle and/or horse paths;
6.
Temporary nonresidential structures used in connection with fishing, growing, harvesting, storage, or sale of crops raised on the premises;
7.
Buildings lawfully existing prior to the adoption of these provisions;
8.
Temporary construction for the repair or placement of pipes, drains, utilities, and like installations, which are currently permitted by the Select Board; and
9.
Any work undertaken by or on behalf of the Town of Winchester individually or in conjunction with any other governmental agency, so long as that work is subject to regulation under existing State or Federal laws or regulations.



