| Jiangya Dam | |
| Location Map: | China |
| Coordinates: | 29.5406°N 110.7394°W |
| Country: | China |
| Location: | Zhangjiajie |
| Status: | O |
| Construction Began: | 1995 |
| Opening: | 1999 |
| Cost: | US$400 million |
| Dam Type: | Concrete gravity |
| Dam Height: | 1310NaN0 |
| Dam Length: | 3680NaN0 |
| Dam Width Base: | 1070NaN0 |
| Dam Volume: | 13700000NaN0 |
| Dam Elevation Crest: | 2450NaN0 |
| Dam Crosses: | Loushui River |
| Res Capacity Total: | 17400000000NaN0 |
| Res Catchment: | 37110NaN0 |
| Res Elevation: | 2360NaN0 |
| Plant Hydraulic Head: | 800NaN0 (design) |
| Plant Commission: | 1998[1] |
| Plant Turbines: | 3 x 100 MW Francis-type |
| Plant Capacity: | 300 MW |
| Plant Annual Gen: | 756 GWh |
The Jiangya Dam is a concrete gravity dam on the Loushui River, located 500NaN0 northeast of Zhangjiajie in Hunan Province, China. The primary purpose of the multi-purpose dam is flood control but it also generates hydroelectricity, supplies water for irrigation and municipal use and improves navigation.
The dam's power plant has a 300 MW capacity and generates on average 756 GWh annually. It provides for the irrigation of 55700NaN0[2] and water storage for about 50,000 people. The dam also reserves 7400000000NaN0 for flood storage and supports a 20-ton ship lift. Construction on the dam began in 1995, the first generator was operational in 1998 and the project complete in 1999. The dam was constructed with roller-compacted concrete (RCC) and is noteworthy because it was the first dam to use the slope/inclined laying process as opposed to horizontal. This technique was used from the dam's midsection upward and reduced both the cost and time of construction.[3] The dam was constructed at a cost of about US$400 million, of which $97 million was provided by the World Bank.[1]
The dam is a 1310NaN0 tall and 3680NaN0 long concrete gravity dam with a structural volume of 13700000NaN0. The base of the dam is 1070NaN0 wide and the crest is at an elevation of 2450NaN0 while the reservoir has a normal elevation of 2360NaN0. The dam sits at the head of a 37110NaN0 catchment area and creates a reservoir with a capacity of 17400000000NaN0.[4] The dam's spillway is controlled by four gates and at the base of the chutes, flip buckets dissipate the water's energy. Within the three center spillway piers are three intermediate outlets. These outlets and the spillway can discharge up to 117000NaN0. The dam's power house is located underground on the dam's right bank and contains three 100 MW Francis turbine-generators. The dam's 20-ton ship lift is located on the left bank and is 9350NaN0 long. The irrigation intake is located on the left bank of the reservoir.[5] [6]
Over the eastern part of Jiangya reservoir at 29°35'21"N 110°44'23"E multiple wires of a VLF-transmitter used for transmitting orders to submarines are spun. The facility is similar to Jim Creek Naval Radio Station, but much larger,