The mandarin duck pond reservoir big dam

　　　Locate the gold city southwest in tower County 12 kilometers of clip the mountain canyon, with its ground for the mandarin duck bird stay a water but get, belonging to greatly(two) a type reservoir, the biggest soil dam in whole country reservoir engineering, irrigate 230,000 acres of farmlands, feed more than 10 myriad peopleses a people, is the gold tower people's"the gold bowl", is compared to"mother's database" by people, company general manager CHEN2 YI2 appoint central university marine hydraulic engineering a department chairman the element a professor to allow that project office director, starting construction from June of 1943, go to in May in 1947 tell last 4 years, complete a beginning to set up engineering:All of the soil dam grow 261 meters, crest the breadth is 5 meters, the bottom breadth is 189.3 meters, high 30.26 meters, lead the water wall, the upper stream wall is high 9 meterses, growing 84 meters, the downstream wall is high 4 meterses, growing 79.2 meter, spillways, the breadth is 100 meters, growing 182.54 meters, overflowing to flow an embankment to grow 38 meters, high 2 meters;The water supply culvert is high 2.5 meterses, growing 164 meters, the clear slot grows 76 meters;Enter the floodgate and shuts room, the steel gateway two, the breadth is 1.76 meters, high 2.6 meters, heavy 3 tons.The room is a circular, inside pack the iron casting hand to shake to shut machine two sets, two each hurl of counties artificials is 43s, adding up work 860,000s for day, always investing 1,600,000,000 dollars(old currency).Retain water 1,200,000 sign a square rice, can infuse farmland more than 70,000 acreses.The reservoir circulates the second year, adding to establish 36 bore movable wood system gateways in the original spillway, jacking up water level 1.5 meters, increasing to retain water 6,000,000 sign a square rice.Change for the in August in 1949, block the remaining water with the wooden board, lately Chinese establish hereafter, the successive government and whole county the people insist unremittingly, begging it to become greatly, expanding and setting up to reinforce successively five times:June 25th in 1951, flood sudden rise, the water supply culvert coping fell to sink, before the hole robbed to build the loess heart wall half month dike urgently, another in the east of the soil dam carried to open the water supply culvert lately be 506 meters with clear slot, the hole grew 128 meters, the bottom breadth was 3 meters, diameter is 2.5 meter, for the reinforcing bar do not press hole, before the hole establish the two bores iron casting flat panel gateway, use 25 the ton hand push type pole shut machine to hold to make.One after year, the spillway goes again to reinforce, forbearing the downstream to build syrup to carve a stone to overflow to flow an embankment, descending to set up to eliminate dint to make 35 bores, and change to carve a piece of stone embankment body for the cement lime syrup.The reinforcing bar protects a practical embankment of noodles, adding high one meter, always being up to 10.5 meters, facing a high distance of water 1318 meters, the database permits to increase to 80,000,000th to sign a square rice.1964 loses the water hole wood system work bridge at openning right bank lately to add high 6.05 meterses, changing to make reinforcing bar bridge.Add the soil dam high 1.8 meter for 1972-1973 years, the dam crest the high distance reach to 1323.8 meters;The spillway is high 1.55 meterses, the coping increases to establish the breadth 3.6 meters reinforcing bar 砼 artificial to make bridge, assembling 10 tons to move the type trolley, the pondage increases to 85,000,000th to sign a square rice.August of in 1994 goes to the end of in 1988, as to it's make again in addition to reinforcing nearly, the total devotion funds is 23,640,000 dollars, the labor work the day was 400,000s, mainly infusing the soil dam left and right shoulder foundation purdah syrup.The soil dam is last to increase to build to defend the wave wall, and seal to block up a beginning to set up into of old water supply culvert, after widen dam slope.The spillway changes 35 bores 11 bores.The embankment builds to eliminate dint to protect behind, losing the water hole and other subsidiary facilities to all make to correspond a reformation, the completion rows a distance to measure 245,000 sign a square rice, attain the best in addition to the insurance standard.