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<br />CUlDrLlr,c5 f-!J~ ,LOOD PL.AU', MA:'JAcU~U.r
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<br />~~" ~,Q~ be!!" ~ui"~~r\g 0" ~"G (l"~"'jlyir\g the flood pl~i"~
<br />of d'J<'~c "nj ~n",ller ~t,C?~"S aem,,, t:-'e ~'Ti~al of th~ pion~~~ ~"t-
<br />tl~r$. T~.~ ~t~e"rn~ fint pLwJ;,'ed tr~"";>~,,t!!:.lOr\ ~r\d ""tG" ~u~Fly
<br />"no!, b,te~, tlld~ c.J3u'al!y g'J"tl~ VQ1l2'1 ~'r~"~~ er.c"~r"U"d the CGn~
<br />9tn,dion of hig~.~"y~ anc rAilr<o..d~. TOd"y. th" COrtt~,'''~i~g gr"'~th
<br />of cities ~ezwlt" in eVG~ in~~s381ng c~~[oach~~rtt Ort tha floQ~ pl~ir\~.
<br />Hn;-<>ugh bitt~r "xpG~i"nce. ,our> has lB"rncd th~t flo"ds
<br />;,'"riodic~lly ir,u"dd8 portiur$ llf th" flood plair>, d~m"ging property
<br />.nd "ftert c3ueing lO~3 of lifc. \hst "oney and m~terial resources
<br />h~vn beN\ exponded fo~ gtruct~~al fiood co,~trol proj~"to--d"",s ~"<.I
<br />~~servoir~, levees, chnrtnel lrn;Jl""v~m,,"ts. end similar protactiv"
<br />~"rb__d"sign~d ~o 6~CU[O man's habit"t "g~i~(}t th" force "f flatu,"'s
<br />flood$. Unfortunatdy, ho,""v"r, encro"~hma,,t on thc fleod plains
<br />h3u t3k~n pl~ce rHstsr thart corttrol str~cture~ c~n be built a~d
<br />costly flood d~m~ge~ h~ve co~tinued to i~crc~ge across the n~ti~n.
<br />This inc~e~se has ied to " ne~ ~ppro",ch fDr rOd.Jcing flood d"'"~'lD~,
<br />[:~l;'"d "f<oad pial" :r"'''a~~''E''''1..'' thb "c~ ~pjJr"'ach c;onsisb of "1'_
<br />pl yi"9 con hots ov"r th8 usa of B'B flnad pr<>n~ l~r1d '~hich lieo
<br />~cj"(;l'nt lo lh~ ~~1.~1"cour~",~.
<br />Cuiu"""" elf. v"li<'>Ll~ rJuud ~1"1,, "'~I'''~~I"""l l"'-'hnlL;LlrlS,
<br />
<br />th"t Can b~ adopted i"" 1"cdhtic fl"od dD""'.lO rock;diOr\ ,",09""'"
<br />is ;"'~~ooted in the folla~'ing toxt. S~cdfic ~ccc"mOr1ddtiOrtS for
<br />irnplempnting eny particula, teehr1ique ~1"e not provided, how~ve~,
<br />~~ ~uch optiLln g"net~lly ,~m"in" ~h" J.'~"IJun"iuiiity of l"~,,L "00_
<br />munily, cou"~y, <>1' St~tu g"vi'tnl"u "ge"d~w.
<br />
<br />1,',t"'r')r"'t."~i,,n nf Oc'""
<br />rlo<>d"ej ~~,,~ :n~P~. profiles, ~nd ,"elected eros" "n~~io"s
<br />"r~ pravid~d in tho 1"npnrt lo tJofine the limil~ of flooding th"t
<br />~'culd D'~~U~ d'~~i"g ~r\ lrtt~,roedi~t~ kegeonal f'lo<ld o~ Stnnd""d
<br />Pr"j"d flollil. HYl'olh":i~,,l "x~ropl"" of th",,~ prn~e~t~tim"'.
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<br />"
<br />
<br />
<br />.
<br />
<br />
<br />,
<br />
<br />d~pictirt~ the a~Dal limite "nj BJev.tiom. of the ~.."pectiv" futu~~
<br />floods at om i~""gin"ry location, ~r~ shown art the following pecJ'"
<br />Tha l~teral limit. of flooding from tha lfltermodiate
<br />Rogional flood (IRF) ar" ~h(,",~ by tha blue-shaded are",; c~O"~i"9
<br />this "re~. the wavy IkF elmiatio~ li.~e~ ~epr"setlt "ater su,fac", co~-
<br />tours at 5 foo~ intervals; and th~ solid biue an". indic3teg the
<br />additian~l "~"a that ~ould be inund~~od by the St~nd~~d Projoct flood
<br />(spr). ThQ flood profile ~ho~, thB r~lative depth of fioodw~te,g
<br />along the centerline ef the stream. Tha cro~s ~ection e~~~ple in_
<br />
<br />
<br />I,',
<br />
<br />I
<br />I
<br />
<br />dieutB9 thB depth and"later~l exteot of flooding that would
<br />
<br />occur at
<br />
<br />.
<br />
<br />I
<br />!
<br />i
<br /><;
<br />,I
<br />
<br />the apncirind cros~ ~ectiort; other information on flood flow depth" at
<br />tho location of the Cr"s~ cection i, tabulated below. Similar data
<br />can bs d8veloped fo~ arty flood pl~in loc~tion ir1 th~ study reach
<br />considered in this ropo~t,
<br />
<br />Dist""c~ frOIO
<br />Str"~,,, Centerline
<br />feet
<br />
<br />Depth
<br />lRf-
<br />feet
<br />
<br />ofrlQodwator
<br />'"
<br />feet
<br />
<br />,
<br />,
<br />
<br />Lo~~tion
<br />
<br />P~int A
<br />
<br />;0
<br />
<br />u
<br />
<br />3.1.
<br />
<br />:!
<br />
<br />1~0
<br />
<br />u
<br />
<br />,.;
<br />
<br />Poiot B
<br />
<br />,
<br />,
<br />II
<br />
<br />20,0
<br />
<br />LO
<br />
<br />PDint C
<br />
<br />.
<br />
<br />6y using i"for;1atio~ as illLlstruted abovB, together with
<br />olhor d~t~ such ~~ froqJency of occ_~r~~ce. v~loclty "f flow, and
<br />dura.tionoffloodirtg,eonc'",nedindic'iJutllsc"n....ek!!knowl€dge"ble
<br />decisions rdativ" tu th~ use, dev<'!opment, ood ",,,n"9,,,"cnt of arB""
<br />subject to inund~tian.
<br />
<br />
<br />70r1i"'1
<br />
<br />Conntituthg D legal tac! th"t c"n b. used to implement
<br />~nd enforce the d~t"ilr.d ;>lo"" "-5~:t;.ng Fro," a lenu uso phnrtirt~
<br />pr<>gr,,,,,, aulactive .o.~in9 ~"S~O~ ,'c~ '''Q~t b~,,~fici,," "S~ of Flood
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