By 22:00 May 31 (Beijing time), the entire channel was finalized and completely constructed (see photo to the left for a view of the channel inlet segment). The final channel dimensions are: Total length = 475 m; bottom elevation of inlet segment = 740 m, bottom width > 7 m; bottom elvation of the middel segment = 740 m, bottom width > 7 m; bottom elevation of outlet segment = 739 m, bottom width > 10 m. The channel was further changed to make the bottom wider in the downstream segment than the upstream segment and the bottom slope milder in the upstream segment than the downstream segment.
[Other reports: 1）"Leaving a 475-meter-long channel up to 10 meters wide on the giant blockage". 2）The total channel length as 475 m, inlet elevation down to 740 m, and outlet elevation down to 738 m. 3）Inlet channel bottom elevation of 739.15 m - at the inlet edge I assume. 4) Near 4 meters wide at the narrowest location from a CCTV reporter (Bai Songyan)'s body measurements]
“经过前方６２１名和后方４００名武警官兵、水利专家连续６天昼夜奋战，截至３１日２２时，唐家山堰塞湖应急疏通工程建设任务正式完成。”
“唐家山堰塞湖抢险现场副总指挥、水利部总工程师刘宁介绍说，截至３１日２２时，共完成土石方开挖１３．５５万立方米，钢丝笼护坡４２００立方米，疏通道路１７公里，平整场地１４０４０立方米，清障树木３５０００立方米。此次抢险共投入推土机２６台，自卸车４台。”
“截至目前，开挖的泄流槽总长４７５米，进口段底高程７４０米，底宽大于７米。中间段高程７４０米，底宽大于７米。出口段高程７３９米，底宽大于１０米。”
[其它报导: 1）475 米长 宽至 10 米。2）“泄洪槽总长475米，泄洪槽进口高程降至740米，出口高程降至738米。”3） 泄流槽（进口）高程739.15米 - 我想是在进口边缘。4）中央电视台记者白岩松用身体测量最窄处近四米宽。]
Info source: Xinhua; Photo credit: Reuters
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