The dam in 1976
Country Japan Location Tadami Coordinates Coordinates: Status Operational Construction began 1961 Opening date 1963 Owner(s) Electric Power Development Company Dam and spillways Type of dam Arch-gravity Height 83 m (272 ft) Length 188 m (617 ft) Impounds Tadami River Reservoir Capacity 15,800,000 m3 (12,809 acre·ft) Active capacity 5,000,000 m3 (4,054 acre·ft) Catchment area 656.9 km2 (254 sq mi) Surface area 89 ha (220 acres) Power station Commission date 1963, 2003 Hydraulic head Unit 1: 50.8 m (167 ft)
Unit 2: 48.1 m (158 ft)
Turbines 1 x 95 MW, 1 x 87 MW Kaplan-type Installed capacity 182 MW
The Otori Dam (大鳥ダム Ōtori damu ) 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 (95 MW) was commissioned on 20 November 1963 while Unit 2 (87 MW) 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 (or "useful") for power generation. The reservoir has a catchment area of 656.9 km2 (254 sq mi) and surface area of 89 ha (220 acres). 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.
- List of power stations in Japan
- Tagokura Dam – located downstream
- ^ "Otori Dam" (in Japanese). DamMania. http://dammania.net/fukusima/ootori.html. Retrieved 15 August 2011.
- ^ "Case study 01-02: Biological Diversity - Okutadami and Ohtori Expansion Hydropower Project, Japan". IEA Hydropower Implementing Agreement Annex VIII: Hydropower Good Practices: Environmental Mitigation Measures and Benefit. New Energy Foundation. 2006. http://www.ieahydro.org/reports/Annex_VIII_CaseStudy0102_Okutadami_Ohtori_Japan.pdf. Retrieved 14 August 2011.
Dams in Fukushima PrefectureAkimotoko Dam · Asahi Dam · Fujinuma Dam · Hatori Dam · Honna Dam · Jyurokkyou Dam · Kaminojiri Dam · Katakado Dam · Miharu Dam · Miyagawa Dam · Miyashita Dam · Okawa Dam · Okutadami Dam · Otori Dam · Ouchi Dam · Shingo Dam · Shinmiyagawa Dam · Surikamigawa Dam · Tadami Dam · Taki Dam · Tagokura Dam · Uwada Dam · Yamasato Dam · Yanaizu Dam
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