渠道全长77公里,有支斗渠137条,灌田9.5万余亩。现今渠道全长116公里,灌溉面积35.1万亩,最大引水量45立方米/秒[1]。
明嘉靖四十一年(1562年),宁夏巡抚毛鹏令中卫文武职官带本卫丁夫三千人,在旧口之西6里,开凿新口,月余渠成,以“渠美利民”之意,将蜘蛛渠易名为“美利渠”。
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