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Federal Emergency Manogement Agency watertight with walls that are imper- meable to the passage of water without human intervention. Basement walls shall be built with the capacity to re- sist hydrostatic and hydrodynamic loads and the effects of buoyancy re- SUlting from flooding to the floodproofed design level, and shall be designed so that minimal damage will occur from floods that exceed that level. The floodproofed design level shall be an elevation one foot above the level of the base flood where the dif- ference between the base flood and the 500-year flood is three feet or less and two feet above the level of the base flood where the difference is greater than three feet. (ii) Have the top of the floor of any basement area no lower than five feet below the elevation of the base flood; , (iii) Have the area surrounding the structure on all sides filled to or above the elevation of the base flood. Fill must be compacted with slopes pro- tected by vegetative cover; (iv) Have a registered professional engineer or architect develop or review the building's structual design, speci- fications, and plans, including consid- eration of the depth, velocity, and du- ration of flooding and type and per- meability of soils at the building site. and certify that the basement design and methods of construction proposed are in accordance with accepted stand- ards of practice for meeting the provi- sions of this paragraph; (v) Be inspected by the building in- spector or other authorized representa- tive of the co=unity to verify that the structure is built according to its design and those provisions of this sec- tion which are verifiable. [41 FIt 46975. Oct. 26. 1976. Redesignated at 44 FIt 31177. May 31. 1979, as amended at 48 FR 44543 and 44552. SePt. 29. 1983; 49 FR 4751. Feb. 8. 1984: 50 FIt 36025. Sept. 4. 1985; 51 FR 30308. Aug. 25, 1986; 54 FIt 33550. Aug. 15. 1989] ~60.7 RevisiODli of criteria for flood plain ....a...agement regulations. From time to time part 60 may be re- vised as experience is acquired under the Program and new iIlformation be- comes a.vailable. Co=unities will be given six months from the effective date of any new regulation to revise S 60.12 their flood plain management regula- tions to comply with any such changes. ~ 60.8 Definitions. The definitions set forth in part 59 of this SUbchapter are applicable to this part. . Subpart B-Requiremenlrs for State Flood Plain MClnagement Regulations 560.11 Purpose of this subpart. (a) A State is considered. a "co=u- nity" pursuant to ~59.1 IJf this sub- chapter; and, accordingly, the Act pro- vides that flood insurance shall not be sold or renewed under the Program un- less a co=unity has adopted adequate flood plain maTla,gement regulations consistent with criteria established by the Administrator. (b) This subpart sets fo:rth the flood plain management CriterilL required for State-owned properties lc.cated within special hazard areas identified by the Administrator. A State shall satisfy such criteria as a conditiclD to the pur- chase of a Standard Flood Insurance Policy for a State-owned structure or its contents, or as a condition to the approval by the Administrator, pursu- ant to part 75 of this sub<:hapter, of its plan of self-insurance. [41 FR 46975. Oct. 26. 1976. Re.iesignated at 44 FIt 31177. May 31. 1979. as amended at 48 FIt 44552. Sept. 29. 1983; 49 FR 4~151. Feb. 8. 1984) ~60.12 Flood plain ...a...agement cri- teria for State-owned properties in special hazard areas- (a) The State shall comply with the minimum flood plain management cri- teria set forth in ~560.3, 60.4, and 60.5. A State either shall: (1) Comply with the flood plain man- agement requirements of all local com- munities partiCipating in the program in which State-owned properties are 10- cated;or (2) Establish and enforce flood plain management regulations which, at a minimum, satisfy the criteria set forth in 5560.3, 60.4, and 60.5. (b)'The procedures by which a state government adopts arld administers flood plain management regulations satisfying the criteria set forth in .. .,". , ". ~ 245 . ....