Dunalastair Water (

Scottish Gaelic Scottish Gaelic ( gd, Gàidhlig ), also known as Scots Gaelic and Gaelic, is a Goidelic language (in the Celtic branch of the Indo-European language family) native to the Gaels of Scotland. As a Goidelic language, Scottish Gaelic, as well as ...

: "Loch Dhùn Alastair") is an entirely man made reservoir in

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...

which lies between

Loch Rannoch Loch Rannoch (Scottish Gaelic: ''Loch Raineach'') is a freshwater loch in Perth and Kinross, Scotland. It is over long in a west–east direction with an average width of about , and is deepest at its eastern end, reaching a depth of .Tom Weir. ...

and

Loch Tummel Loch Tummel (Scottish Gaelic: Loch Teimheil) is a long, narrow loch, northwest of Pitlochry in the council area of Perth and Kinross, Scotland. It is fed and drained by the River Tummel, which flows into the River Tay about south-east of the C ...

in Strath Tummel in

Perth and Kinross Perth and Kinross ( sco, Pairth an Kinross; gd, Peairt agus Ceann Rois) is one of the 32 council areas of Scotland and a Lieutenancy Area. It borders onto the Aberdeenshire, Angus, Argyll and Bute, Clackmannanshire, Dundee, Fife, Highland and S ...

council area. The loch provides water power for the Tummel

hydroelectricity Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other Renewabl ...

power station and has the reputation as one of the best wild

trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salmoni ...

fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment, but may also be caught from stocked bodies of water such as ponds, canals, park wetlands and reservoirs. Fishing techniques inclu ...

locations in the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...

Overview

Dunalastair Water lies at the approximate grid reference of it has an area of 165 hectares, being 2.5 km long and 800 metres wide at its broadest point. It was formed by the damming of the River Tummel by the Grampian Electric Supply Company in 1933 as part of the

Tummel hydro-electric power scheme The Tummel hydro-electric power scheme is an interconnected network of dams, power stations, aqueducts and electric power transmission in the Grampian Mountains of Scotland. Roughly bounded by Dalwhinnie in the north, Rannoch Moor in the west an ...

. The reservoir is narrow at its head, taking the form of a slender wooded glen with the Dunalastair estate situated on the northern bank. The reservoir has roads running on both its northern and southern shores, the B846, which is the road between

Pitlochry Pitlochry (; gd, Baile Chloichridh or ) is a town in the Perth and Kinross council area of Scotland, lying on the River Tummel. It is historically in the county of Perthshire, and has a population of 2,776, according to the 2011 census.Scotla ...

and

Rannoch railway station , symbol_location = gb , symbol = rail , image = Rannoch.jpg , caption = Rannoch station, looking north from the footbridge , borough = Rannoch, Perth and Kinross , country ...

runs on the northern shore while a minor road from

Kinloch Rannoch Kinloch Rannoch (; Gaelic: ''Ceann Loch Raineach'') is a village in Perth and Kinross, Scotland, at the eastern end of Loch Rannoch, 18 miles (29 km) west of Pitlochry, on the banks of the River Tummel. The village is a tourist and outdoor p ...

runs on its southern side. The Water is hemmed in by high ground to the north and south, with

Beinn a' Chuallaich Beinn a' Chuallaich is a Scottish hill, four kilometres northeast of the village of Kinloch Rannoch in the Perth and Kinross council area. It is part of the high ground between Strath Tummel and Glen Errochty. Overview Beinn a’ Chuallaich is ...

to the north and

Schiehallion Schiehallion (; gd, Sìth Chailleann, ) is a prominent cone-shaped mountain in the Breadalbane region of the Scottish Highlands, in the county of Perthshire. It rises to and is classed as a Munro. Schiehallion has a rich botanical life, inte ...

to the south. The dam itself is 65 metres wide and has two floodgates and several spillways due to the quantity of water which sometimes needs to be released Into the River Tummel. The main purpose of the dam is to act as an

intake An intake (also inlet) is an opening, structure or system through which a fluid is admitted to a space or machine as a consequence of a pressure differential between the outside and the inside. The pressure difference may be generated on the ins ...

which supplies water to an open 15 metre wide concrete aqueduct that runs to the south of the River Tummel. The aqueduct flows for five km losing very little height, keeping to the 200 metre contour before feeding the Tummel hydroelectricity power station at the head of

through two large pipes.

Biology

Dunalastair Water is a shallow reservoir, having an average depth of only 1.5 metres and this provides unique biological conditions for birds with the site around the Water being declared a

SSSI A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

over an area of 241.6 hectares. Among the birds which can be seen on the site are

Old World warbler Old World warblers are a large group of birds formerly grouped together in the bird family Sylviidae. The family held over 400 species in over 70 genera, and were the source of much taxonomic confusion. Two families were split out initially, the ci ...

willow warbler The willow warbler (''Phylloscopus trochilus'') is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and the Palearctic, from Ireland east to the Anadyr River basin in eastern Siberia. It is strongly ...

bittern Bitterns are birds belonging to the subfamily Botaurinae of the heron family Ardeidae. Bitterns tend to be shorter-necked and more secretive than other members of the family. They were called ''hæferblæte'' in Old English; the word "bittern" ...

grey heron The grey heron (''Ardea cinerea'') is a long-legged wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in much of its range, but some populations from the more northern ...

egret Egrets ( ) are herons, generally long-legged wading birds, that have white or buff plumage, developing fine plumes (usually milky white) during the breeding season. Egrets are not a biologically distinct group from herons and have the same build ...

kinglet A kinglet is a small bird in the family Regulidae. Species in this family were formerly classified with the Old World warblers. "Regulidae" is derived from the Latin word ''regulus'' for "petty king" or prince, and refers to the coloured crowns ...

and

goldcrest The goldcrest (''Regulus regulus'') is a very small passerine bird in the kinglet family. Its colourful golden crest feathers, as well as being called the "king of the birds" in European folklore, gives rise to its English and scientific na ...

. Gives list of birds on loch. Dunalastair Water is a first-rate venue for fishing with the shallow waters warming quickly and generating good feeding for the fish and providing a huge variety of insect life. There are some very large

brown trout The brown trout (''Salmo trutta'') is a European species of salmonid fish that has been widely introduced into suitable environments globally. It includes purely freshwater populations, referred to as the riverine ecotype, ''Salmo trutta'' morph ...

which inhabit the water and feed mainly at night.www.flyfish-scotland.com.
"Huge variety of insect life and very large brown trout". Fishing is strictly from boats and outboard motors are banned. The dam incorporates a

fish ladder A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movemen ...

this is of the pool and weir design and consists of 18 pools.Scottish Environment Protection Agency.
Gives details of acqeduct, fish ladder and SSSI.

References

{{authority control Lochs of Perth and Kinross Reservoirs in Perth and Kinross Protected areas of Perth and Kinross Freshwater lochs of Scotland RDunalastair