The Orkla is a river in Trøndelag and Hedmark counties in Norway. At 180 kilometres (110 mi) in length, it is the longest river in Trøndelag county. The river follows the Orkdalen valley, discharging into the Orkdalsfjorden, an arm of the large Trondheimsfjorden, at the town of Orkanger.
Mouth of the river at Orkanger
|Municipalities||Orkdal, Meldal, Rennebu, Tynset|
|⁃ location||Oppdal, Trøndelag|
|⁃ elevation||1,058 metres (3,471 ft)|
|0 metres (0 ft)|
|Length||179 km (111 mi)|
|Basin size||3,053 km2 (1,179 sq mi)|
|⁃ average||67.27 m3/s (2,376 cu ft/s)|
|⁃ left||Inna, Byna, Grana, and Resa|
|⁃ right||Ya and Svorka|
The river originates in the lake Orkelsjøen in the municipality of Oppdal in the Dovrefjell mountains. The river runs through the municipalities of Oppdal, Tynset, Rennebu, Meldal, and Orkdal. The municipalities are all in Trøndelag county, except for Tynset, which is in Hedmark county. Major towns and villages along the river include: Orkanger, Fannrem, Vormstad, Svorkmo (in Orkdal); Storås, Meldal, Å (in Meldal); and Voll and Berkåk (in Rennebu).
The Orkla is a popular river for salmon fishing, a famous fisherman there being former Liverpool player Vegard Heggem. About an 88-kilometre (55 mi) long stretch of the river through Orkdal, Meldal, and Rennebu is used for salmon fishing throughout the season from June through August.
The river is regulated by five power generation reservoirs, which were built between 1978 and 1985. The reservoirs have been a successful method of flood control preventing the river's major seasonal flooding. The decommissioned Eidsfossen Power Station stands along the river south of the confluence with the Ya River at Yset.
The Old Norse form of the name was just Ork (still found in the names Orkanger, Orkdal and Orkland). The meaning of the name is unknown (maybe derived from the verb orka which means "to work" - the meaning of the name would then be "the river that works its way forward"). The name Orkla (with the diminutive ending -la) originally belonged to the uppermost part of the river (lying in Tynset, Hedmark), and the meaning of this name is probably "the small part of Ork".
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