|
<br />I
<br />
<br />I
<br />
<br />a
<br />
<br />FLOOD HAZARD STUDY
<br />SOUTH FORK RIOCRANDEA.'m
<br />RIO GRANDE IN THE VICINITY
<br />OFSOlJTllFORK,COLQRADO
<br />
<br />S~eti(}n 37-60-10~([)(ol, C"lO~3do Revised Stat'J~e< \973, a~t''''ri~e8 tne
<br />
<br />I
<br />
<br />!
<br />
<br />C,,1"~8do Water CQn8dr"~t ion BoaTd "to desil\n..te and "pprove stOr<ll Ot flcod-
<br />
<br />w"ter runaff ohannels or basins, and to make suehdesi'lnations av aitableto
<br />
<br />I
<br />
<br />a
<br />
<br />INTRODUCTION
<br />
<br />legis13_tive bodies of cities 8nd incorp"rated towns, to county planning
<br />
<br />I
<br />
<br />c""'missions, and to boards of adjust...",t of citi".. inco<pcHated to\oll'lS, and
<br />
<br />.
<br />
<br />This flood h~~a.d rep"~t WII.' prepar..." by th.. u. S. Department of
<br />
<br />counties of this "tate." The Bo~rd is providing a.. ;stance to local gove~n-
<br />
<br />I
<br />
<br />I
<br />
<br />AJlriculture, Soil Con.e~v"tion Service, in coope~"tion with the Colorado
<br />Wate~ Conservation Board, Rio Grande Co~~ty, and the Rip Grande Spil
<br />
<br />""''Its in the developKle~t and adoption of effect ive flood plain ordinances.
<br />
<br />In >lrldition, the ll()ard a5Sist~ and prcwides financial assistance for flood
<br />
<br />I
<br />
<br />Censervation District.
<br />
<br />phin infO~Klation studies in Colo~ado.
<br />
<br />9
<br />
<br />I
<br />
<br />Obiectives
<br />The objective of this study is tp prpvide flopd hazard information and
<br />mapping toRi.o Grande County so they can implement flood plain..ana l!"..ent
<br />pregra"" >IIIich will minimize the potentiatlones f:coo> floodlnl!' Included
<br />in the r"pp~t are engineering and hydrplogic data >IIIich will facilitate the
<br />develppment of a ftood plain IlI8nagement plan, rpad and bridge plans e nd
<br />design, and non-structural andlpr struct~ral flood control measu~e$ (if
<br />needed). rnte~pretations pf the flopd h,uard stndy and ~ecallm,,~ndations tn
<br />
<br />Sectian 30-28-111 fo~ county governments and Section 31-23-201 fo~
<br />
<br />I
<br />
<br />!
<br />
<br />municipal governments of the Cola~edo Revised Statutes 1973, states: The
<br />
<br />J
<br />
<br />cities. incorporated towns, and cauntie. within the atudyarea""'ypravide
<br />
<br />I
<br />
<br />zoning ~egulations: "... ta utahl iah, regulate, ~estrict, and limit SUCh
<br />
<br />I
<br />
<br />useS on ar dang any stor", ar f1<>odwate~ runoff c"annel or basin that has
<br />
<br />I
<br />
<br />been desil;nated and app~ovcd by the Colorado W,Her Conservation Board, 1n
<br />
<br />I
<br />
<br />o~der to lessen or avoid the ha"a~d" to persons and da"'"ge to proDerty
<br />
<br />re.ulting rr"", th" accumulation of _Ho.... 0< f1oodv"t~H..."
<br />
<br />I
<br />
<br />9
<br />
<br />reduce dmllar.es are included; however, it i" beyond the scope of this report
<br />
<br />Therefore, upon official approval of this report by t"c Colorado Water
<br />
<br />I
<br />
<br />to provide .pecific propo...l8 or plans to ~ectify the floOd in; problems.
<br />
<br />Conservation Boa~d, the "reas described as being inundated by th.. 100-year
<br />
<br />g
<br />
<br />Authority
<br />TIlia atudy was re,!uested bv Rio Grande County throu~h tlte Color ad"
<br />Water Conservation Board (CWCB). The CWCR is the state coordinator !o~ all
<br />
<br />flood (Intermediate Rellional Flood)1 can he deaignated as flood huard
<br />
<br />I
<br />
<br />II
<br />
<br />~,~'" ""J U,~i, u~". r"~uin,,d accnrdingly uy i.he ioc"i ag"nC1e5.
<br />
<br />F100dharard studie. are carried out hy the Soil Con."rvation Serviee
<br />
<br />I
<br />
<br />~
<br />
<br />floodplnin info...ationstudies and is'tesponsible for setting priori ties
<br />and scbeduling chese studies. The CWCS and tbe Soil Canservation Se~vice
<br />
<br />as an outp,rowth ot the re~o~~endatio". in A Repprt by the Task Foree on
<br />
<br />I
<br />
<br />8
<br />
<br />entered into a Joint Coordination Agreement for floadhazardanalyses in
<br />
<br />Fcderal Flood Cpntrol Policy, llouseDocU<l1ent No. 465 {89th Conl;reu, AUllU"t
<br />lO,1966},especiaIlYRec=endation9(cl,~htioncfLandU.e,wllich
<br />
<br />I
<br />
<br />january 1972 (revised November 1978). The Phn of Study for South Fork Rio
<br />
<br />rec"""",,nde<l the pr"paratinn 'If p~"U~inary rep"rt~ t"r g\lid.~n~" in t"o~e
<br />
<br />i
<br />
<br />I
<br />
<br />Grn"d" and Rio Crande Ya~ prepsr~d in M.rch 1918.
<br />
<br />,
<br />
<br />IThe te~m. "InteT1.edia(~ Regional Flood," "lOO-year n""d," nnd ""'Ie
<br />percent flood" can be used ;ntcHhan'l,'ably a. they are all defined by the
<br />same type of flpod e"€,,t (see Glossary).
<br />,
<br />
<br />I
<br />
<br />9
<br />
<br />I
<br />
<br />- --- --~.__._..._------
<br />
|