Ordinance No. 19407 - Laserfiche WebLink

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I. Prohibition on encroachments, including fill, new construction, substantial improvements, and other development unless certification by a registered profess._anal engineer or architect is provided demonstrating that encroachments shall not result in any increase in flood levels during the occur- rence of the base flood discharge; and 2. If the conditions of subparagraph ~. above are met,, all new construction and substantial improvements shall com- ply with all other applicable flood hazard reduction provi- sions of this section. fie} Shallow floodin areas - with de th desi nations. Shallow flooding zones appear on Flood Insurance Rate Maps FIRM), with depth designations, wherever such flooding occurs on sloping water surfaces such as alluvial fan flow, wave wash after the wave has broken, etc. In these areas, the following provisions apply: T, New construction and substantial improvements of res- idential structures within these zones shall have the lowest floor including basement} elevated above the highest adjacent grade of the building site, to at least one foot above the depth number specified an the FTRM. where appropriate, such structures shall be elevated above the craws of the nearest road, to at least one foot above the depth number specified in the FIRM. where hazardous velocities are noted on the FIRM, consideration shall be given to mitigating the effects of these velocities through proper construction techniques and methods. 2. New construction and substantial improvements of non- residential structures within these zones shall either: a. Have the lowest floor including basements ele- vated above the highest adjacent grade of the building site to at least one foot above the depth number speci- fied on the FIRM; or b. Together with attendant utility and sanitary facilities, be completely f1oodpraofed to at least one foot above that level so that any space below that level is watertight with walls substantially impermeable to the passage of water and with structural components hav- ing the capability of resisting hydrostatic and hydro- dynamic loads and effects of bouyancy. If this method is used, compliance shall be certified by a registered professional engineer or architect. where hazardous velocities are noted an the FIRM, considera- tion shall be given to mitigating the effects of these velo- cities through proper construction techniques and methods. Section 4. That the matters contained herein concern the public health, safiety and welfare and therefore, an emergency is hereby declared to exist, and this Drdinance shall become effective immediately upon its passage by the City Cvunci1 and approval by the Mayor. Ordinance - 9