Laserfiche WebLink
<br />~ <br />I <br /> <br />rlood~ay Designation <br />A designated {loadway is the area of the flood plain <br />provided to convey a design frequency flood. 'rhe"designflood" <br />often selected in connection with floadway determination is the 100- <br />y"arfrequencylr.termediateRegionalFlood. rntermsofmaintaining <br />a reasonable balance between the advantages of reducing potential <br />flood losses and the disadvantages of overly restricting land use, <br />the Intermediate Regional Flood's heights and areal limits are con- <br />sidered most practical for use in gaining the goals sought throug~ <br />selective zoning. <br /> <br />Buildir.aCodes <br /> <br />Zoning <br /> <br />A ~11-written and properly enforced building code can <br />effectively reduce daMages to buildings in the floOd plain during <br />flood periods. A few of the requirements which should be specified <br />in a building code to red~ce flood damages are: prevent flotation <br />of buildings from their fou~dations by requiring proper anchorage: <br />establish basement elevations and minimum first floor elevations <br />consistent with pOtential Hoods: requite structural strength to <br />withstand water pressure or high velocity of flowing water; restrict <br />the use of =terials whiCh deteriorate rapidly when eXpOsed to ~'ater; <br />prohibit equipment that might be hazardo~s to life whe~ 5~bmerged, <br />such "5 11 C ~\e"ical storag<>, boiler s or e lectr ical equipment. <br /> <br />Constituting a legal tool that oan be used to implement <br />and enforce the detailed plans resulting frorn a land-use planning <br />program. Selective zoning ensures the most beneficial use of flood <br />plain lands while safeguarding the health, safety and welfare of the <br />cow~unity_ Designated floodways may b<> reserved by establishing <br />encroach1'n"ntlines that clearly define the floodwaY7.0ne. Desig- <br />nated floodways should be ~o"ed for the purpo~e of passing flood- <br />waters and for other limited uses that do not conflict with that <br /> <br />prim~ry p~rpose. The utili~ation o~ flood plain lanJH arlj~cent to <br />the flc>o<iway is limited only by tb" cle'1~e" o~ floo(l ri~k eec""'" <br />allowable (a det.e~millation o~ local gov<>rnment) and the require- <br />ments of the cit.y's zoning criteria for the area. <br /> <br />Development Policies <br />While all regul~tory controlu arc valuabl~ tool~ in com- <br />prehe~sive flood da~ge preventicr. plar.ning, probably the no~t <br />effect.ive tool i~ i~ the arM. of development pOlicies. "Flood <br />con~cio"~" govern"er.tal ?Olicies cr.at limit the extension of pClblic <br />ro",,::~, utili~ies a:!d other nervices into ~lood p,-one areas can play <br />3n i~port3"t in~ircct rol~ in shapi~g eve,-"ll development. By <br />locating public facilities away f~om flood prone are~s, a soft-sell <br />nega tive infl'~~"ce is pro~"-c tecl ",hie't e1\COu~dges the oc<:up""cy of <br />"i,,~c::- ",..<:! ~:::~cr "::-~,,,,:;!. <br /> <br />SutxlivisionRequlations <br />Subdivision regulations are used by local government~ <br />to specify the manner in ",'hich 1,>1\<:1 ....y be divided. They ".,;:,.y ~t/ltc <br />the r"''l.uire'' wictth ()f ~tr"''''~~, ,.~o:uirements for curbs and gutters, <br />size of lot., elevation of land, freffiiom f~om flooding, si7.e of flood- <br />ways <lnd other poilltspHtinent to the healt!'., safety and weHareof <br />the community. These regUlations provide an effectiv~ ~~an5 of con- <br />trolling construction and p::-eservinq floodwaY3 i~ ptesently urAevel- <br />opeu flood plain arca~. <br /> <br />Flood proofing <br />flood proofi~q is a combination of structural changes <br />arid "dj~stroe"ts to prop"rti,," subject to fioodin'l primarily for th" <br />n,c\lJ.Ctb" Cr "litnill"tion of flooc! c!a",""".,. r,ltho"gh it ic. Nsi".. <br />""d mere ~'c<lno"".i~,,lly ,,~,pl.i"d tD "e~' cor.~tructLo~. floD<! proofing <br />is "lso applicdhle to exis~in9 facilitieq. An examp]~ of a flood- <br />proof",". buildi"9 is depict"", on th~ followinc page. <br />.^. '~3efd quirk, "Ir,trod~ctcon to Flood I'rcofir.<;," pre- <br />I"'red by t~le Center fer Urban Stucli;,s, ':~Lvcr~ity of Chicago, ~"der <br /> <br />" <br /> <br />4C <br />