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FLOOD09584
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Last modified
1/29/2010 10:12:05 AM
Creation date
10/5/2006 4:28:43 AM
Metadata
Fields
Template:
Floodplain Documents
County
Dolores
San Juan
Community
Southwest Colorado
Stream Name
San Juan, Dolores, Uncompahgre Rivers
Basin
San Juan/Dolores
Title
Office Report on May-July, 1973 Snowmelt Floods in the Upper Colorado River Basin
Date
4/1/1974
Prepared For
State of Colorado
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Flood Documentation Report
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<br />gravel plant.; to paver, t.l.phoae, ga., water, .nd r.ilro.d f.cilities; <br />aad to oil .ad aa. traa.port.tion lina.. Public f.cility 10.... includ. <br />~e to ro.d. aad bridae., l.ve. .y.tems, irrig.tion div.rsion .truc- <br />tur.. aDd caaal., chaaaal., .uaicip.l f.ciliti.s, .nd public .chool., <br />all of which .r. ovaed or .datni.tered by public .gaDcie. or DOn-profit <br />priv.t. orgaa1z.tion.. Included in this clas.ific.tion are expenditur.. <br />by Fed.ral, Stat., aad local ag.nci.. for flood fighting, repairias flood <br />control vorlta, aDd c:ar1n& for ev.cuated p.opl.; oth.r public co.te; aad <br />10.... to tha tr.v.l1n& public re.ult1n& fro. d"'led highw.y. aad bridges. <br />DaMa. to dovaatreaa r...rvoir. due to .iltation was DOt evaluated. <br /> <br />10. btaDt aDd charact.r of d...... in flooded .r.... - As .hova in <br />table 3, the ._It runoff of 1973 re.ulted iD the floodias of appro:ld.- <br />_tely 7,300 acre. iD the Upp.r Coloredo Be.iD .nd 5,400 .cre. in the <br />Great Be.iD area of Utah. 1laJIa&.. a.sociat.d vith this flooding were <br />eatmated .t $3,765,000. <br /> <br />11. In the San Juaa-Color.cio Subr.gion of the Upp.r Colorado Relion, <br />.o.t str_ flowed at bank capacity. Priaary daaaa. vas the result <br />of U&h vater aad .ro.ion. Field cIuIaa. occurred frOll ov.rballk flova <br />in the Aaiaaa wat.rshed, otherwis. .aricultural d...... were relat.d to <br />overflow. .t ozbov. aDd d..... to headgate. and irrigation f.ciliti... <br /> <br />12. On San Juan Ri".r abov. N."ajo B.e.ervoir. .o.t of the flood d...... <br />occurr.d in the Rio Blanco, Pi.dra and Saa Juan _inst. wat.r.hed with <br />so-ut Ie.. flood d..... occurr1n& iD the .."ajo aad Lo. Pinos (pin. <br />Ri".r) wat.rsb.d.. The Rio Blaaco overflow.d it. banks at ..v.ral point.. <br />~1n& adjacent Madovlaad, bridges, faDcn and irrigation fadliti... <br />A f_ farahoua.. v.r. r.ported d.....d by the flood. Kiaor ov.rbaak <br />flov. occurred oa the Pi.dra Riv.r; .ro.ion d"'S.d two private lev.... <br />aa a.tiaated 10 acr.. of fa~aDd aad irriaation faciliti.., aDd under- <br />II1ned a eection of ro.d. Irrigation fadliti.. wer. the uin daaased <br />it_ aloas the Navajo River .y.t... Th. oaly d...ga it... report.d <br />aloas the Lo. Pino. Riv.r ...r. the 10.. of spill...y vall eection. on <br />Vallecito ....rYOir aDd daaa&. to irrig.tion faciliti... during the <br />runoff p.riod. KiDOr cIaaq.. to irrig.tion f.dliU.. were also reported <br />oa tributary .tr.... to the Lo. PiDO. Ri"er. <br /> <br />13. In tba Saa Juan Iliv.r Sub-ba.in below N.v.jo Reeervoir, _.t of the <br />daaa&.. occurr.d in the Ani... .ad Manco. Ri".r vater.hed.. <br /> <br />14. A peak flow .t Duraago of 7,590 c.f... c.uaed wide.preed floodiaa <br />of aaricultural landa in the ADiaa. v.11.y .bOY. Durango, Color.do, which <br />is lIiOt unuaual durias ..jor flood events. Lo.... includ. daag. to <br />aralias aad hay land; irria.tioa faciliti.., and private le"e..; al.o <br />r..id.ntial. c~rci.l, aad iDdu.tri.l property. He~.. Cre.k, a <br /> <br />7 <br />
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