Loch Quoich is a loch

Loch

Loch is the Irish and Scottish Gaelic word for a lake or a sea inlet. It has been anglicised as lough, although this is pronounced the same way as loch. Some lochs could also be called a firth, fjord, estuary, strait or bay...

 and reservoir

Reservoir

A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

 situated west of Loch Garry

Loch Garry

Loch Garry, , is 25 km north of Fort William, Lochaber, Scotland, and is 11 km long and 50 m deep. It is fed by waters from Loch Quoich 10 km upstream on the River Garry, and drains into Loch Oich in the Great Glen just 5 km downstream...

 approximately 40k m northwest of Fort William

Fort William, Scotland

Fort William is the second largest settlement in the highlands of Scotland and the largest town: only the city of Inverness is larger.Fort William is a major tourist centre with Glen Coe just to the south, Aonach Mòr to the north and Glenfinnan to the west, on the Road to the Isles...

, Lochaber

Lochaber

District of Lochaber 1975 to 1996Highland council area shown as one of the council areas of ScotlandLochaber is one of the 16 ward management areas of the Highland Council of Scotland and one of eight former local government districts of the two-tier Highland region...

, Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. The name means "loch of the cup/quaich

Quaich

A quaich , archaically quaigh, is a special kind of shallow two-handled drinking cup or bowl in Scotland. It derives from the Scottish Gaelic cuach meaning a cup....

".

Both lochs form part of the Glen Garry hydroelectricity

Hydroelectricity

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy...

 project commissioned by the North of Scotland Hydro-Electric Board

North of Scotland Hydro-Electric Board

The North of Scotland Hydro-Electric Board was founded to design, construct and manage hydroelectricity projects in the Highlands of Scotland...

in the 1950s.

The dam on Loch Quoich is the largest rockfill dam in Scotland at 320 m long and 38 m high. The scheme was completed in 1962.