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<br />The Flood HazArd Ar~a Map Index is useful in locating the var'eus flood
<br />hazard exhibits in respect to the study .tea. The locations of flood hazard
<br />area ""'1'. and study reaches 8.0:. ith..t......d On the Flood HazArd A.e. Map
<br />Index,
<br />Flood Profile.
<br />In addition to the 100- and 50D-year frequency floods, hydraulic
<br />studies "..re !lIode on the 10- Dod 50-year events. InfoI1ll~tion regarding
<br />these .,"atler floods is especially usefuL for engineering design purposes
<br />related to roads, stono ''''',,'Ca, channeh, and appurtenant atn'ctures. Flood
<br />profiles for the vad".... ife""',,n,,>, floods ue included in this report as
<br />E:<<Iibit A. For infonDseion reguding flood elevations lit s specific 10<:8-
<br />tion, the flood profi1e data can be used in conjunction with tl>e flood
<br />harard area maps. The cross-section location. wlIicll appear on both the
<br />profiles and _po can be used as tcfetence points. Yloodhautd atea sheet
<br />""..ben, conopstible with cross-section locations, are shown on each flood
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<br />".ed; S"ct':"" A, B, . . . Y, Z, ;.A, AB, e~c. The desi_~nation ""'1uence i.
<br />,,~i'lue fa.. each reac", Wi.th the except ion of .tartin~ "nd cnd points, the
<br />de.i~nati"n is not carded over fro.. one reach tn another.
<br />Ex"ibit 11 i. a selection of typical vatley c..oas-sections ittustutin~
<br />the confi~urati"n of U..ea.. ehannels and adjoining Hood plain "reas. Sho,"",
<br />on the c..oss-sections a..e the elev..tions and late..al extent fat the 100- and
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<br />500-yeat flood events.
<br />Flood Frequency-Elevation and Diaehat~e Data
<br />Table 1, palleS 1 thtOullh 1" include flood crest elevations and peak
<br />dischu~ea fo.. the 10-, 50-, 100-, and 500-year floods. Tabulated infor"",,-
<br />tion is intended for use i~ conjunction witb. the wste.. surface p..ofiles and
<br />flood !laza..d a",," rn.1pS. ttle information is com.patible with ..eac" n..",ben
<br />sndc..osa-sectiondesi.';nations.
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<br />FLOOD 1'OTl'.:IiTIAL - FUTURE CONDITIONS
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<br />Ilrofileexhibit.
<br />As .gene..al guide for odentation purposes, the follnwinll desienations
<br />ue assi;ned to at""3" rcaches, floodhaza..d arca ..aps, alld CtOu-s"ctiO<l6.
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<br />South Fork RioCn"de
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<br />FloodHazardA..ea Reach Cross-Section
<br />Ma~-Sheet Nu..bet Nu.we.. Desi1!nationa
<br /><, ',- W 1 A thru V
<br />10&11 , " BAthruBF
<br />11&12 3 BF,CAthruCO
<br />I, " 3, " 4 MthrllOZII
<br />4, 5, .. 5 DZB,EAth.."o:X
<br />-, " .. . ", FAthrunl
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<br />Inc.."aaedRunoH
<br />The effects of watenhed land use chan~es anticipated within the next
<br />10 years, W'ilt be ",ino.. in rehtion to increasing futu..e floodheighrs.
<br />Deve lop"..nt~ "" ie.. could inc..eas.. runoff 81'" ino ign if icant in respect to the
<br />Rio e..ande and SOllth Fo..k flood plains becaus" of the. followi~ ..eason6'
<br />(1) potential devetop~nts are located in the lOW'er rellc"ea of the watetshed
<br />Whe.." a 61i,,"t a~lInt of additional ..unoff has a ..inor effect On the ..a~i-
<br />tude of ....JO.. flood ftows (i.e., r"e 100-year fre'luency flo<>d), and (2) the
<br />.ajor portion of runoff originates in the Rio erande National Forest ~e..e "
<br />...all a~unt of land use chan~e i, anr;~;p~t~d.
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<br />Rio Grande
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<br />Ty;>icd Valley Crou Sections
<br />C..""s-sections fo.. each str".n.. ar" d..si"nated alphabctic-ally, .taHin~
<br />from the doW'nst..e.... ""d of ellch study rc..ch. The fc>llowtn,> o..d".. has been
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