FLOOD02442

• County: Rio Grande
• Community: South Fork
• Stream Name: South Fork Rio Grande River
• Basin: Rio Grande
• Title: Flood Hazard Study
• Date: 10/1/1980
• Prepared For: South Fork
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Floodplain Report/Masterplan

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FLOOD HAZARD STUDY
SOUTH FORK RIOCRANDEA.'m
RIO GRANDE IN THE VICINITY
OFSOlJTllFORK,COLQRADO

S~eti(}n 37-60-10~([)(ol, C"lO~3do Revised Stat'J~e< \973, a~t''''ri~e8 tne

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C,,1"~8do Water CQn8dr"~t ion BoaTd "to desil\n..te and "pprove stOr<ll Ot flcod-

w"ter runaff ohannels or basins, and to make suehdesi'lnations av aitableto

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INTRODUCTION

legis13_tive bodies of cities 8nd incorp"rated towns, to county planning

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c""'missions, and to boards of adjust...",t of citi".. inco<pcHated to\oll'lS, and

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This flood h~~a.d rep"~t WII.' prepar..." by th.. u. S. Department of

counties of this "tate." The Bo~rd is providing a.. ;stance to local gove~n-

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AJlriculture, Soil Con.e~v"tion Service, in coope~"tion with the Colorado
Wate~ Conservation Board, Rio Grande Co~~ty, and the Rip Grande Spil

""''Its in the developKle~t and adoption of effect ive flood plain ordinances.

In >lrldition, the ll()ard a5Sist~ and prcwides financial assistance for flood

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Censervation District.

phin infO~Klation studies in Colo~ado.

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Obiectives
The objective of this study is tp prpvide flopd hazard information and
mapping toRi.o Grande County so they can implement flood plain..ana l!"..ent
pregra"" >IIIich will minimize the potentiatlones f:coo> floodlnl!' Included
in the r"pp~t are engineering and hydrplogic data >IIIich will facilitate the
develppment of a ftood plain IlI8nagement plan, rpad and bridge plans e nd
design, and non-structural andlpr struct~ral flood control measu~e$ (if
needed). rnte~pretations pf the flopd h,uard stndy and ~ecallm,,~ndations tn

Sectian 30-28-111 fo~ county governments and Section 31-23-201 fo~

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municipal governments of the Cola~edo Revised Statutes 1973, states: The

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cities. incorporated towns, and cauntie. within the atudyarea""'ypravide

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zoning ~egulations: "... ta utahl iah, regulate, ~estrict, and limit SUCh

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useS on ar dang any stor", ar f1<>odwate~ runoff c"annel or basin that has

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been desil;nated and app~ovcd by the Colorado W,Her Conservation Board, 1n

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o~der to lessen or avoid the ha"a~d" to persons and da"'"ge to proDerty

re.ulting rr"", th" accumulation of _Ho.... 0< f1oodv"t~H..."

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reduce dmllar.es are included; however, it i" beyond the scope of this report

Therefore, upon official approval of this report by t"c Colorado Water

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to provide .pecific propo...l8 or plans to ~ectify the floOd in; problems.

Conservation Boa~d, the "reas described as being inundated by th.. 100-year

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Authority
TIlia atudy was re,!uested bv Rio Grande County throu~h tlte Color ad"
Water Conservation Board (CWCB). The CWCR is the state coordinator !o~ all

flood (Intermediate Rellional Flood)1 can he deaignated as flood huard

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~,~'" ""J U,~i, u~". r"~uin,,d accnrdingly uy i.he ioc"i ag"nC1e5.

F100dharard studie. are carried out hy the Soil Con."rvation Serviee

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floodplnin info...ationstudies and is'tesponsible for setting priori ties
and scbeduling chese studies. The CWCS and tbe Soil Canservation Se~vice

as an outp,rowth ot the re~o~~endatio". in A Repprt by the Task Foree on

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entered into a Joint Coordination Agreement for floadhazardanalyses in

Fcderal Flood Cpntrol Policy, llouseDocU<l1ent No. 465 {89th Conl;reu, AUllU"t
lO,1966},especiaIlYRec=endation9(cl,~htioncfLandU.e,wllich

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january 1972 (revised November 1978). The Phn of Study for South Fork Rio

rec"""",,nde<l the pr"paratinn 'If p~"U~inary rep"rt~ t"r g\lid.~n~" in t"o~e

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Grn"d" and Rio Crande Ya~ prepsr~d in M.rch 1918.

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IThe te~m. "InteT1.edia(~ Regional Flood," "lOO-year n""d," nnd ""'Ie
percent flood" can be used ;ntcHhan'l,'ably a. they are all defined by the
same type of flpod e"€,,t (see Glossary).
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