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<br />FLOOD FIGHTING METHODS 2003 <br /> <br />6.3A <br />Page 56 <br /> <br />Wet Flood Proofing Requirements for Structures <br />Located Within Special Flood Hazard Areas <br /> <br />National Flood Insurance Program regulations require that <br />buildings on extended wall foundations or that have <br />enclosures below the base flood elevation must have <br />foundation or enclosure wall openings. These openings <br />prevent the foundation or enclosure walls from weakening <br />or collapsing under pressure from hydrostatic forces during <br />a 100 year flood event. The openings allow flood waters <br />to reach equal levels on both sides of the foundation or <br />enclosure wall and minimize the potential for damage from <br />hydrostatic pressure. <br /> <br />"- <br />r"'-"":::::-.:::::::.~", <br />\----.--. -_..._ '.. <~:::::=--=:r- -" <br /> <br />)~-- --------.-.. <br />~ -. ~....-..-----.... ---.....-- <br />1-.,_.. -_._ <br />{, --.----.. ~----......-- <br />\ ----- <br />y.....-----...-----.... --..-......- <br /> <br />)~'- -..~--..-.- <br />\ ............-. --..~- <br />..-<~ ----- <br />\~~~:"-"--- <br />1 ~~~ <br /> <br /> <br />~~\ <br />__AI #'1\ <br />-:.::::>- II A'ff;!t1 <br />-"')~/1 <br />_.---.---- I! ....---...---1 <br />- ' ------.-, <br />...--.-' p,-:~~=-" <br /> <br />---------- ---- <br /> <br />.::-_.==-.::~~~:~ <br />~.-..- ~~P-,; <br />i ~ 1 <br />, -~ \ <br />J~-- ! <br /> <br /> <br />, <br />/-.-----..-.---.. "" ....\..-. <br /> <br />-......~.....-.............. <br />~..................-- <br />........ <br /> <br />..../...../ ~-- <br /> <br /> <br />~ <br /> <br />Foundation or wall openings must be kept <br />open within special flood hazard areas <br /> <br />Figure 20 <br /> <br />These Openings Must Not Be Blocked If The Building Is <br />Located Within A Special Flood Hazard Area. <br />For details refer to FEMA Technical Bulletins TB1-93 and TB-7. <br />These bulletins may be obtained from the FEMA web site at: <br />http://wwwfema.gov <br />For additional information contact DWR Floodplain Management <br />at (916) 653-9902. <br /> <br />27 <br />