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<br />S~me of the buildcnlls in the northe~n part of nel Norte are
<br />full of ",ater, ri~e feet bei,,~ report".; in lhe old e..eamuy.
<br />This year's hil;!:" water is not believ"d to be as .o;reat as the
<br />flood of 1911 but the damage cannot he..ccurately "stimated until
<br />tne wateu recede."
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<br />der",\J"", up"". J"~"lup[[J",,,ts [" th" flood l'lain, topol;raphy "r ."e flooded
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<br />area, obstructions and Jebris, depths and "..lociti". of flow, and rUes of
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<br />The flood of October 1911 was caused by widespread heavy rains
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<br />rise and du.ationof flooding.
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<br />rhroul;!:houtsouthw"sternColorado. n.e,"ostrecent floodin.o;,MayI979,
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<br />In respect to the total Hood plain, the lar.o;est area subject to
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<br />floodinll is used for all"e"lt"r". Most of the agricultural area is in
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<br />~as cau~ed ffom ~ltin~ Sno~.
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<br />Ihehighest flood of fecofd 0" South FOfkRioG....nde.."s that of
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<br />irfi~ated pastufe and hAyla"d (ReAch 4); and flood losses could i"clude
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<br />OctoberS, 1911. It deatfoyed fouf bridges, i"cluding the Dcnver 6 Rio
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<br />damagea to ifri~ation systems, deposition oC sedement and debris, and loas
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<br />oClivestock.
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<br />Grande Railroad bridge near the mouth of the rive... The gage waS destroyed,
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<br />Unde.. present conditions, potential flood. of the 100- and SOO-year
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<br />but dudng subsequent investig..tion it ....s learned fr"",.. local re.ident
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<br />frequency would inundate 71 buildings. Thi..ty-eiJlhtbuildinga, including
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<br />that the river began to rise about 7,00a.Ttl., October S, and ro.eat >l rate
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<br />residential and utility structures, are partially or tot..lly located in the
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<br />oC about 1 foot per hou.., overf1o~ing it. banks about 11:00 ...... It stayed
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<br />100-year flood plain. Areas ~ith the highest density of developmeot a..-e
<br />located in the FootHill. tstates No. 2 Subdivision (Reach J), thelo"e..-end
<br />of the study ....-ea (Reach 4), aod Masonic Park (Reach 6). Plood~aters could
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<br />..tthehigheststageuotilaboutZ,30p.... thensta..tedto fall,andat7:00
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<br />p.... ~u ag..in ..ithio its banks. Fr"'" high ~ater marks the peak diacharge
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<br />on the South Fork ~a. e.timated to be about 8,000 .econd-feet. The dia-
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<br />caus" dama~"s to buildin~.. la~ns, ~ardens and ro~d c.ossin~.. Th~ ~en"ral
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<br />charge downstream on the Rio Grande at Del No.te ~"s 18,000 second-feet.
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<br />sr"... of the 100-year flood is .ho"" 00 the Flood Hazard Area IndexM..p.
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<br />This flood .disch'''l!e ..as ~reate.. than the discharge expected from a 100-year
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<br />Detailed outl in,,, .ho"in~ the approxim.te limits of 100- and SOD-yen. floods
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<br />frequeneyflood. The flood of June 29,1927, theh;ghestsubsequent to that
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<br />are Located on the Flood Hazard Area Maps, sheets I th<ou~h 12.
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<br />of 1911, rlOached a stage about I foot lo~er than the flood of 1911, but no
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<br />Obstructions in the floodplain,naturalorTIlSn-made, influence the
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<br />estimate of the discl,argc is svaihble for the South t'o..-k. The discharge
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<br />rlepth and ~Ldtl, of th.. .rea flooded. Trees and brush gro~ing atOtlg the
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<br />fo..- the same flood on the Rio Grande at Del No..-te ~as l),UOO .econd-teet.
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<br />streamh"nk. rct,ud the out of oh"n"cl flood flo.... caudng back~ater .."d
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<br />Historically flood damages have been to road crossings, railroads,
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<br />greater depths of floMing. Road o[o..inRs ~ith inadeqU'lte culvert and!or
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<br />irrigation structure., irrigated pastures and grazing l..nd. Damages to
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<br />bridge openings often becom" c'tannel constrictions and obHru~tion to flood
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<br />urbanized "reas have occurred below the atudy area, in and near the to~ns of
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<br />culvert and brid,e constdctions a..-e di'~h,~' o~ "
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<br />f1o~s.
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<br />The effects of
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<br />Del Norte and Monte Vi.ta.
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<br />nOM nazHd Area !>laps Sheet 110". 4,7,8,9. and 11. Tr,,"s, brush, and
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<br />~~~ri.. ",..he~ "cot durin~ the r>"rio~. "f hi~ r"nnff, 'c~ ~'rried d,,~'nst<ca'"
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<br />fLOOD POTENTIAL - PRESf.NT (DNDITIONS
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<br />llu3rds of Large Floods
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<br />Amount of dam,,~es and haz..rdous conditions caused by any flood are
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