How long is the construction period of Yichuan ancient water conservancy project?

9.5 years. The ancient water conservancy project is located in Qikou-Yumenkou reach of the Dabei main stream of the Yellow River. The dam site is located at the upstream of Hukou Waterfall 10 km, with Jixian County in Shanxi Province on the left bank and Yichuan County in Shaanxi Province on the right bank. It is a large-scale water control project focusing on flood control and siltation reduction, taking into account the comprehensive utilization of power generation, water supply and irrigation. The total storage capacity of ancient water conservancy projects is 65.438+02.942 billion cubic meters, and the total installed capacity of hydropower stations is 265.438+10,000 kilowatts, with an average annual power generation of 5.442 billion kWh. The dam is a roller compacted concrete gravity dam with a maximum dam height of 2 15m. The total investment of the project is 53.855 billion yuan, and the total construction period is 9.5 years.