2010-03-22-ATM-min - Laserfiche WebLink

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March 22,2010 Session of the 2010 Annmad Town Meeting,coat_.. Insurance Study(FIS)report dated June 4,2010. The FIRM and FIS report are incorporated herein by reference and are on file with the Town Clerk and Community Development Department and available on the Town website. 2. Delete and replace the existing§135-43B so that it reads as follows: B. National Flood Insurance District (1) Purpose of the district. The purpose of this district is to insure public safety through reducing the threats to life and personal injury;eliminate new hazards to emergency response officials;prevent the occurrence of public emergencies resulting from water quality,contamination,and pollution due to flooding;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;eliminate costs associated with the response and cleanup of flooding conditions;and,reduce damage to public and private property resulting from flooding waters. (2) Superimposed over other districts.The Floodplain District is herein established as an overlay district. (3) Base flood elevation and floodway data. (a) Floodway Data. In Zones A and AE,along watercourses within the Town of Lexington 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. (b) Base Flood Elevation Data. Base flood elevation data is required for subdivision proposals or other developments greater than 50 lots or 5 acres,whichever is the lesser,within unnumbered A zones. (4) Notification of Watercourse Alteration.In a riverine situation,the Conservation Administrator shall notify the following of any alteration or relocation of a watercourse: Adjacent Communities,NFIP State Coordinator,and NFIP Program Specialist. (5) Use Regulations. (a) The Floodplain District is established as an overlay district to all other districts. All development in the district,including structural and non-structural activities,whether permitted by right or by special permit must be in compliance with Chapter 131, Section 40 of the Massachusetts General Laws and with the following: [1] Section of the Massachusetts State Building Code which addresses floodplain and coastal high hazard areas(currently 780 CMR 120.G, "Flood Resistant Construction and Construction in Coastal Dunes"); [2] Wetlands Protection Regulations,Department of Environmental Protection (DEP)(currently 310 CMR 10.00); [3] Inland Wetlands Restriction,DEP(currently 310 CMR 13.00); [4] 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. (b) In Zones AE,along watercourses within the Town of Lexington that have a regulatory floodway designated on the Middlesex County FIRM Map, encroachments are prohibited in the regulatory floodway which would result in any increase in flood levels within the community during the occurrence of the base flood discharge. (c) All subdivision proposals must be designed to assure that: [1] such proposals minimize flood damage; [2] all public utilities and facilities are located and constructed to minimize or eliminate flood damage;and [3] adequate drainage is provided to reduce exposure to flood hazards.