Ōmachi is a city located in Nagano Prefecture, Japan. As of 1 March 2019, the city had an estimated population of 27,559 in 11861 households, and a population density of 49 persons per km2. The total area of the city is 565.15 square kilometres (218.21 sq mi).
The Kurobe Dam (黒部ダム) or Kuroyon Dam (黒四ダム), is a 186 m (610 ft) high variable-radius arch dam on the Kurobe River in Toyama Prefecture, Japan. The tallest dam in Japan, it supports the 335 MW Kurobe No. 4 Hydropower Plant and is owned by Kansai Electric Power Company. It was constructed between 1956 and 1963 at a cost of 51.3 billion yen. The project was a difficult engineering feat for the rapidly growing post–World War II Japan, and claimed the lives of 171 people.
The Shinano River, known as the Chikuma River in its upper reaches, is the longest and widest river in Japan and the third largest by basin area. It is located in northeastern Honshu, rising in the Japanese Alps and flowing generally northeast through Nagano and Niigata Prefectures before emptying into the Sea of Japan.
The Ōito Line is a railway line in Japan which connects Matsumoto Station in Nagano Prefecture with Itoigawa Station in Niigata Prefecture. There are two operators on the line: East Japan Railway Company operates the section south of Minami-Otari Station in Otari, Nagano Prefecture, and West Japan Railway Company operates the remaining section. Minami-Otari is the boundary for the two companies. The section of the line operated by JR East, between Minami-Otari and Matsumoto, is electrified and trains are fairly regular along this section. The JR West section from Minami-Otari to Itoigawa, however, is not electrified and is used very little, compared to the electrified JR East section. Trains run far less regularly along this part.
Honna Dam is a gravity dam on the Tadami River in Kaneyama, Fukushima Prefecture, Japan. It was constructed between 1952 and 1954 for the purpose of hydroelectric power generation. It supplies a 78 MW power station with water.
Katakado Dam is a gravity dam on the Tadami River 5 km (3 mi) west of Aizubange in the Fukushima Prefecture of Japan. It was constructed between 1951 and 1953 for the purpose of hydroelectric power generation. It supplies a 57 MW power station with water.
Yanaizu Dam is a gravity dam on the Tadami River 2 km (1 mi) upstream of Yanaizu in the Fukushima Prefecture of Japan. It was constructed between December 1952 and August 1953 for the purpose of hydroelectric power generation. It supplies a 75 MW power station with water.
Miyashita Dam is a gravity dam on the Tadami River 2 km (1 mi) upstream of Mishima in the Fukushima Prefecture of Japan. It was constructed between 1941 and 1946 for the purpose of hydroelectric power generation. It supplies a 94 MW power station with water.
Tadami Dam is a rock-fill embankment dam on the Tadami River near Tadami in Fukushima Prefecture, Japan. It was constructed between 1981 and 1989 for the purposes of hydroelectric power generation and controlling the outflows of the Tagokura Dam. It supports a 65 MW power station.
Taki Dam (滝ダム) is a gravity dam on the Tadami River, 7.3 km (5 mi) east of Tadami in Fukushima Prefecture, Japan. Surveys for the dam were carried out in 1958, construction began in 1959 and the dam was complete in 1961. The primary purpose of the dam is hydroelectric power generation and it supports a 92 MW power station consisting of 2 x 46 MW Kaplan turbines. The dam is 46 m (151 ft) tall and 264 m (866 ft) long. It creates a reservoir with a 27,000,000 m3 (21,889 acre⋅ft) capacity, of which 10,300,000 m3 (8,350 acre⋅ft) is active for power generation. The dam's spillway is controlled by four sluice gates and has a 200 m3/s (7,063 cu ft/s) discharge capacity.
Uwada Dam is a gravity dam on the Tadami River 500 m (1,640 ft) downstream of Kaneyama in the Fukushima Prefecture of Japan. It was constructed between 1952 and 1954 for the purpose of hydroelectric power generation. It supplies a 63.9 MW power station with water.
Kığı Dam is a rock-fill embankment dam on the Peri River in Bingöl Province, Turkey. Its primary purpose is hydroelectric power generation and is the first dam in the Peri River cascade, serving as the headwaters. Construction began in 1998 and is backed by the Turkish State Hydraulic Works. When commissioned, it will support a 180 MW power station. Water from the reservoir will be diverted to an underground power station downstream via an 8.5 km (5.3 mi) long tunnel. In August 2015, suspected Kurdistan Workers' Party militants set fire to three cement trucks associated with the dam construction site. In January 2016, the dam was completed and the reservoir began to impound water.
The Kannagawa Hydropower Plant (神流川発電所) is an under construction pumped-storage hydroelectric power plant near Minamiaiki in Nagano Prefecture and Ueno in Gunma Prefecture, Japan. The power plant utilizes the Minamiaiki River along with an upper and lower reservoir created by two dams, the upper Minamiaiki Dam and the lower Ueno Dam. The power station in between the two dams will contain six 470 megawatts (630,000 hp) pump-generators for a total installed capacity of 2,820 megawatts (3,780,000 hp). Unit 1 commenced commercial operation in 2005 and Unit 2 in 2012. When completed, the plant will have the second-largest pumped-storage power capacity in the world.
The Shin-Takasegawa Pumped Storage Station (新高瀬川発電所) uses the Takase River to operate a pumped storage hydroelectric scheme about 12 kilometres (7.5 mi) west of Ōmachi in Nagano Prefecture, Japan. Part of the system is within Chūbu-Sangaku National Park.
The Kazunogawa Pumped Storage Power Station is a pumped-storage hydroelectric power station near Kōshū in Yamanashi Prefecture, Japan. The station is designed to have an installed capacity of 1,600 megawatts (2,100,000 hp) and three of the four 400 megawatts (540,000 hp) generators are currently operational, for a total operational capacity of 1200 MW. Construction on the power station began in 1993 and the first generator was commissioned on 3 December 1999. The second was commissioned on 8 June 2000. The third one became operational on 9 June 2014, six year early due to post-power demand from the Great East Japan earthquake. The fourth and final generator is slated to be commissioned by 2024. It is owned by TEPCO and was constructed at a cost of US$2.2 billion.
The Okutadami Dam (奥只見ダム) is a concrete gravity dam on the Tadami River, 26 km (16 mi) east of Uonuma on the border of Niigata and Fukushima Prefectures, Japan. The primary purpose of the dam is hydroelectric power generation and it supports a 560 MW power station which is the largest conventional hydroelectric power station in Japan. The dam also forms the second largest reservoir in Japan, next to that of the Tokuyama Dam.
The Otori Dam is a concrete arch-gravity dam on the Tadami River, 17 km (11 mi) southwest of Tadami in Fukushima Prefecture, Japan. The primary purpose of the dam is hydroelectric power generation and it supports a 182 MW power station. The power station contains two Kaplan turbine-generators. Unit 1 was commissioned on 20 November 1963 while Unit 2 was commissioned on 7 June 2003 as part of a power plant expansion project that included an additional 200 MW generator at Okutadami Dam upstream. The dam is 83 m (272 ft) tall and 188 m (617 ft) long. Its reservoir has a 15,800,000 m3 (12,809 acre⋅ft) capacity of which 5,000,000 m3 (4,054 acre⋅ft) is active for power generation. The reservoir has a catchment area of 656.9 km2 (254 sq mi) and surface area of 89 ha. Of the two generators, Unit 1 has a maximum effective hydraulic head of 50.8 m (167 ft) and Unit 2 is afforded 48.1 m (158 ft). The design flood discharge of the dam is 2,200 m3/s (77,692 cu ft/s) and its service spillway is controlled by three tainter gates.
The Unbong Dam, or Yunfeng Dam, is a concrete gravity dam on the Yalu River which borders China and North Korea. It is located 33 km (21 mi) northeast of Ji'an in Jilin Province, China and Chasŏng in Chagang Province, North Korea. The primary purpose of the dam is hydroelectric power generation and it supports a 400 MW power station. Construction of the dam had initially began in August 1942 but was halted in 1945 after the surrender of Japan ending World War II. In October 1959, construction on the dam recommenced and in September 1965, the first of the four 100 MW Francis turbine-generators was operational. The last generator was operational on 4 April 1967. The 113.75 m (373 ft) tall dam creates a reservoir with a storage capacity of 3,895,000,000 m3 (3,157,728 acre⋅ft). The dam's spillway is an overflow type with 21 floodgates and has a maximum discharge of 21,900 m3/s (773,391 cu ft/s). The dam is located before a bend in the river and its power station is located on the other side of a ridge that meets the dam's right abutment. Water is delivered to the power station via two tunnels, 775 m (2,543 ft) and 759 m (2,490 ft) long. Generators 1 and 3 deliver power to China while 2 and 4 deliver to North Korea.
The Kukule Ganga Dam is a 110 m (360 ft) gravity dam built across the Kukule River in Kalawana, Sri Lanka. The run-of-river-type dam feeds an underground hydroelectric power station located approximately 5 kilometres (3.1 mi) away, via tunnel.
The Shimokotori Dam is a rock-fill dam on the Shimokotori River about 15 km (9.3 mi) west of Hida in Gifu Prefecture, Japan. The primary purpose of the dam is hydroelectric power generation and water from its reservoir is diverted via a 8.5 km (5.3 mi) long headrace tunnel to a 142 MW power station northeast of the dam. The power station discharges the water into the Jinzū River. Construction on the dam began in 1970 and it was completed in 1973. The power station went operational in May 1973 and is owned by Kansai Electric Power Company.
