23-25 Amending Chapter 6, Article 9, of the South Bend Municipal Code to Update the Regulations for Flood Damage Prevention

Home Browse Search

service facilities shall be located at/above the FPG or designed so as to prevent water from entering or accumulating within the components below the FPG for non-residential structures. Water and sewer pipes, electrical and telephone lines, submersible pumps,and other waterproofed service facilities may be located below the FPG. (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 system. (g) On-site waste disposal systems shall be located and constructed to avoid impairment to them or contamination from them during flooding. (h) Any alteration, repair, reconstruction, or improvements to a structure that is in compliance with the provisions of this ordinance shall meet the requirements of "new construction"as contained in this ordinance. (i) Base flood elevation data shall be provided for subdivision proposals and other proposed development (including manufactured home parks and subdivisions), which is greater than fifty(50) lots or five(5)acres,whichever is less. (j) Where an existing or proposed structure or other development is affected by multiple flood zones, by multiple base flood elevations, or both,the development activity must comply with the provisions of this ordinance applicable to the most restrictive flood zone and the highest base flood elevation affecting any part of the existing or proposed structure; or for other developments,affecting any part of the area of the development. (k) Fill projects that do not involve a structure must be protected against erosion and scour during flooding by vegetative cover, riprap, or bulk heading. If vegetative cover is used,the slopes shall be no steeper than 3' horizontal to 1' vertical. (1) Non-conversion agreements shall be required for all new or substantially improved elevated structures with an enclosure beneath the elevated floor, accessory structures, and open-sided shelters. (m)Construction of new solid waste disposal facilities, hazard waste management facilities, salvage yards, and chemical storage facilities shall not be permitted in areas of special flood hazard. (n) Whenever any portion of the SFHA is authorized for use, the volume of space which will be occupied by the authorized fill or structure below the BFE shall be compensated for and balanced by an equivalent volume of excavation taken below the BFE. The excavation volume shall be at least equal to the volume of storage lost(replacement ratio of 1 to 1)due to the fill or structure. (i) The excavation shall take place in the floodplain and in the same property in which the authorized fill or structure is located. (ii) Under certain circumstances, the excavation may be allowed to take place outside of but adjacent to the floodplain provided that the excavated volume will be below the regulatory flood elevation, will be in the same property in which the authorized fill or structure is located, will be accessible to the regulatory flood water, will not be subject to ponding when not inundated by flood water, and that it shall not be refilled. (iii)The excavation shall provide for true storage of floodwater but shall not be subject to ponding when not inundated by flood water. (iv)The fill or structure shall not obstruct a drainage way leading to the floodplain. 27