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<br />NUMBER <br /> <br />LOCATION <br /> <br />~HDDLE S1. VRAIN <br /> <br />At Peaceful Valley <br />(S.H. 72) <br /> <br />2 <br /> <br />At mouth <br /> <br />TABLE <br /> <br />DRAINAGE BASIN ARC:AS IIIJD <br />CORRESPOND r NG 0 I SCHMtGI:~; <br /> <br />Above <br />Below <br /> <br />Above <br />Belo~ <br /> <br />-------.-..----------------------------- <br /> <br />SOUTH ST. VRAIN <br /> <br />3 <br /> <br />ConfLuence of MiddLe <br />St. Vrain <br /> <br />DRAINAGE <br />AREA <br />( sq. mi.) <br /> <br />18.7 <br /> <br />32.4 <br /> <br />66.7 <br /> <br />92 <br /> <br />99 <br /> <br />99 <br /> <br />211 <br /> <br />212 <br /> <br />243 <br />255 <br /> <br />256 <br />341 <br /> <br />351 <br /> <br />10.Y[t.F<: <br />(CF~,; <br /> <br />4?C <br /> <br />5q~ <br /> <br />1 ,2;~iJ <br /> <br />1,4(1) <br /> <br />1,60-] <br /> <br />680 <br /> <br />2,04':) <br /> <br />2,030 <br /> <br />3,66l <br />4,11C <br /> <br />4,11l1 <br />5,210 <br /> <br />5,25(1 <br /> <br />50-YEAH <br />(CFS) <br /> <br />860 <br /> <br />1,430 <br /> <br />2,790 <br /> <br />3,750 <br /> <br />4,200 <br /> <br />2.000 <br /> <br />5,576 <br /> <br />5,560 <br /> <br />7,430 <br />8,240 <br /> <br />8,240 <br />10.950 <br /> <br />10.950 <br /> <br />100-YEAR <br />(CFS) <br /> <br />'1,180 <br /> <br />'~, 000 <br /> <br />.3,990 <br /> <br />5,430 <br /> <br />6.000 <br /> <br />:1,100 <br /> <br />11,880 <br /> <br />8,1130 <br /> <br />9,1120 <br />10':;80 <br /> <br />1 0, ~;80 <br />14,1150 <br /> <br />14.850 <br /> <br />The numbers indicated are shown on Figure 1, illustrating tIE' s;)ecif'lc point locations <br />of the drainages areas described above. <br /> <br />4 <br /> <br />A t mouth <br /> <br />NORTH ST. VRAIN <br /> <br />5 <br /> <br />Buttonrock Inflow <br /> <br />6 <br /> <br />Buttonrock SpiLlway <br /> <br />ST. VRAIN CREEK <br /> <br />7 <br /> <br />Confluence of Nor"th & <br />South St. Vrain Creeks <br /> <br />8 <br /> <br />l.yons Gauge <br /> <br />9 <br /> <br />Dry Creek #1 <br /> <br />10 <br /> <br />Lefthand Creek <br /> <br />11 <br /> <br />BouLder County Line <br /> <br />8 <br /> <br />:iOQ.YEAR <br />CCFS) <br /> <br />2,23G <br /> <br />(+,070 <br /> <br />8,560 <br /> <br />l' ,900 <br /> <br />1j . 000 <br /> <br />i,600 <br /> <br />20,260 <br /> <br />20,140 <br /> <br />19,940 <br />21,200 <br /> <br />;~. ,200 <br />;,a,670 <br /> <br />;~a/670 <br />