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SAN JUAN ~lVER 8ASIN 413 ~ " 1!1/a?.i,77C/1! <:) . O'UB700 MCELMO CREEK 8ELOW CORTez_ CO LOCATIONe--Lat 31oZ0oZb-o long l08o~8'19-o in N~~N~~ sec.3~_ T.3b N.. R.18 ~.. MonteZUMa Countt. H1arolo~iC Unit L~080202_ on left bank 100 ft 130 ml aownstrea~ fro. orioqe on Stat~ H.gnway 32_ 150 ft (~b ml aown;tream fro"" Sana Cdnyon. ana lleT Illi {IOe8 kill 1 west of Cortez. DRAlNAGE AREA.--2ij3 .i~ (733 k.~I. PERIOD ~~ ~ECaRO..-OGtober L912 to current year. GAGE.--~ater-staqe reGorder. Altituae of qa~e is 5_~30 ft (1.055 ml_ from tapagra~nic ..p. REMARKs.--~ecoras qooa e_cept those for winter ~eriod. wnicn are f~lr. Oi~erSlons abo~e statIon Ot olack Dike d.tch tor irrigation of 3LO acres {1.25 kMzl above station and ROCk Creek altcn for IrrIgation of 0)0 acres (2.03 kmzl oelow station. Law flows dre ma.nly return flows frolll irr;gatea areas. water IS Imported aoave station from Colores Riv~r Ddsin for irri~atlon of aoout 33.0~O acres (lJ~ k",zl above and celow station IA ~ontezuma Irri~dtlon Oistrict ana for ~un'clpal use by city of Cortez. A S.~ll aMOunt of .ater is ol~ertee at times to Mancos Ri~er oasin. Se~e,al ubservat.ons of speCIfiC conauctance ana wate, te~peratu'e were ootalned and are published elsewnere in tnis repor~. ''\.. AvERAGE OISCHARGE.--q years. 38.5 ft]/s (1.090 m]/sI. IT.890 acre-ft/.,r 13~.1t hllll/yr I. EXTREMES FO. PERIOD OF RECJRo.--"a.IMu~ ais,ndrqe. 1...130 ftJ/s IClO.3 m]/SI Jul Y ". 1Q77. ga4e neiynt. 8.9~ " IZe 7)1 m, . fro'" f 1 ood..rlols. frolll ratIng curve e_tended aDo~e .00 ft]/s {II m]/sj_ on b.sl s 0' stelJ-OdCkwdter metnoa; minilllu. ddi I.,. 'J.01f f~3/s (OeO'J1 1113/s) SelJc. 9. 1974. ExTRE/'lES FO. CUMA.ENT YEARe--~ali.ulII discnarge. ". ftl/S (21.4 .J/S) ., 21t00 Jul'1 '" qaqe neiqh~. S.78 " (Ie 70l mj; "" ni.um ddi 1.,_ 2.2 ftlts (O.:::lbl m]/SI il.pre 10-l4. U 1 SC.H4RCoE. I,. (UBI C FEET PE. SE(.or~u_ 'dTER '1t;AR OCTObER L9bO TO SEPH:"'oER l<,l81 ME.l.N I/ALUES DAY OCT NOY OE( J,N FE' M" ,P. M" JUN JUL AU" ;EP l 20 3l '0 Z5 LS 20 l3 ..1 130 ); 35 14 l 20 2. 28 Z1 1. 21 l3 .., " 7. 3Z 9.0 3 20 3Z 30 28 19 30 17 ..8 .0 .. 28 7.' . 20 3l '" 27 " Z1 Z3 9.' 77 35 2. ..0 , lO lS 30 " 1. l3 19 ... S) Z3 2' lZ . . 20 31 37 l3 l8 31 II .., ., lU ,. 3Z 7 lO 31 " lO 20 3Z 2.' 3.8 39 LS " 20 . 21 31 38 20 17 30 2.' ..0 30 II '0 13 9 l2 31 30 20 " Z3 l.' ... 29 Z3 3Z II 10 Z3 31 ,. II Z3 l3 2.2 '.9 l8 l74 35 II II Z1 3l Z1 Z3 l3 31 2.l 7.0 lO l4. ., II II 19 }) l8 " l4 .. 2.l ... 20 .,. '00 30 l3 30 3. 31 Zl Z3 30 2.l 14 Zl 33' " 34 l4 '0 43 l4 19 l3 Z1 l.l 7.. '9 lS~ .0 " LS 3. 33 l4 " " 2' 2.. ..1 19 ". '0 .. l. '0 '0 l8 21 l4 2. 3.8 2. H 210 70 ,. 17 .8 Z1 lO ,. Z3 Z3 3.' .0 33 17l '0 2. 18 '0 30 lO '9 l2 l3 3.. .. 2' l3. '0 18 19 ., ,. 19 20 Zl Zl 2.7 31 Z3 109 lO " lO 3. lO lO lO 21 Zl l.' 33 Z3 9' " II Zl 30 19 29 18 19 Z5 l4 ., 17 ., l3 lO 2l 19 3l 29 17 '9 2' Z1 3Z 17 ,. 12 12 Z3 ,. .0 2' 10 Z3 Zl 2' 3Z 14 .. 7.3 .2 2' 2. .9 28 20 l4 Zl l3 .9 9.' 39 '.2 .. lS U.. ...'. lr-i._ ... .. L., . """ "'# .01._. ....- ..-. ... . ,"" 2. 21 41 2. 17 '9 19 7.0 Z3 7.. .2 ..8 ,. Z1 2' 34 Z1 20 l4 20 '.9 lO II .. ..8 14 Z8 19 Z1 2' Z3 21 2. 3.8 4Z 8.' 37 lZ 14 29 LS 34 28 " 30 ... ,. 10 35 l. l4 30 19 31 Z1 18 l4 ..1 100 ,. ., ,. l3 31 H l8 17 20 100 30 20 TOTAL '78 99' 911 .s. ST. 788 251f.5 822.5 9L8.8 3088 95Z.0 o81eS MEAN ,..... JjI.l.. iIIlfiiIII"'* -. "... 2._ ........ .I:...~ - -- ...... ..... MU .8 .9 " 28 " .. l8 100 130 ... 100 8l MIN LS " Z4 17 l3 19 2.l 308 ..3 12 '.2 ..0 A(.-FT 11100 1910 1810 noo llltO 15bO '0' L030 18Z0 0130 l890 1350 (AL ,. 1980 TOTAL lOltllt.O MEAN S';.8 MAX 38' M1N LS AC-H ,,"01f90 "TO ,. 1981 TOTAL 1151.q.~ MEA" 31.0 MU ... MIN 2.2 AC-FT uno . 00",nOl \o.'4,\..-'t.)