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<br />canal, and so constructed as to prevent leakage under <br />or around it, maintain a constant and reg'-ilar cross-sec- <br />tion and secure as perfect cond!t:ons for uniform and <br />accurate measurement of velocity and discharge as <br />possible. These flumes are rated periodically by the <br />State Engineer's deputies, and the Water Commission- <br />ers vJatch them carefully and set tl1e headgates in ac- <br />cordance with the tables of discharge computeo from <br />these ratings. A gage rod is p:aced on the site of each <br />f!ume, the record of \vhich is carefuiiy kept, either by <br />daiiy readings or by cortil'"'uous self-recording appara- <br />tus. <br /> <br />Other important structures on the ca~a! are the Horse <br />Creek flume, the Adobe CreeK crossing with waste gates <br />for flood discharge. the waste\vay at Gageby Arroyo. <br />the division gates at Gageby. and the crossing gate near <br />Thurston Lake Reservoir. where the outet canal from <br />the Queen crosses the Fort Lyon Canai at g~ade. <br /> <br />THE HORSE CREEK FLUME. <br /> <br />The canal crosses Horse CreeK with a flume 690 feet <br />long, on a steep grade. making a sharp turn and a drop <br />of 20 feet in this distance. The flume has a width of 28 <br />feet. by 6 feet in depth. The first 250 feet on the upper <br />end is built of bric-<:s ~aid in cement, the bottorT: being an <br />inve~t of brick overlaid by a tear of one-inch lu:-nber. <br />This Dorton of the flume rests 0'1 a natural ~ock founda- <br />I <br />tion. The remaining 440 feet are b~ilt of lumoer, sup- <br />ported on round oak piies, driven to bedrock. in bents of <br />16 feet center to center. The side posts are braced over <br />each bent, and alj are tied across the tops by galva- <br />nized steei wires stretched from side to side. With a full <br /> <br />... , <br />"J <br />