The Kelbra Dam () is a

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...

on the River

Helme Helme may refer to: * G.W. Helme Snuff Mill Historic District, historic district in Helmetta, New Jersey * Helme (river), a river in central Germany * Helme Parish, a rural municipality in Valga County, Estonia * Helme, Estonia, a small borough ( ...

in the German state of

Saxony-Anhalt Saxony-Anhalt ( ; ) is a States of Germany, state of Germany, bordering the states of Brandenburg, Saxony, Thuringia and Lower Saxony. It covers an area of and has a population of 2.17 million inhabitants, making it the List of German states ...

. Behind the dam is the lake known as the Kelbra Reservoir (''Stausee Kelbra'') or Kelbra Flood Retention Basin (''Hochwasserrückhaltebecken Kelbra'').

Purpose

The dam was built to provide

flood protection Flood management or flood control are methods used to reduce or prevent the detrimental effects of flood waters. Flooding can be caused by a mix of both natural processes, such as extreme weather upstream, and human changes to waterbodies and ru ...

and its reservoir collects the waters of the Harz flowing into the southern Harz Foreland via the River Helme and its tributaries. The reservoir lake stores water for

irrigation Irrigation (also referred to as watering of plants) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has bee ...

and is used for

angling Angling (from Old English ''angol'', meaning "hook") is a fishing technique that uses a fish hook attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated with a fishing rod, although rodless te ...

and

recreation Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for happiness, enjoyment, amusement, ...

. Both dam and lake are operated jointly and cooperatively by the Thuringian Long Distance Water Supply (''Thüringer Fernwasserversorgung'') and the Saxony-Anhalt Dam Company (''Talsperrenbetrieb von Sachsen-Anhalt'').

Dam

The Kelbra Dam was built from 1962 to 1966 between

Berga Berga () is the capital of the ''Catalonia/Comarques, comarca'' (county) of Berguedà, in the province of Barcelona, Catalonia, Spain. It is bordered by the municipalities of Cercs, Olvan, Avià, Capolat and Castellar del Riu. History Berga de ...

and

Kelbra Kelbra () is a town the Mansfeld-Südharz district, in Saxony-Anhalt, Germany. It is situated north of the Kyffhäuser mountains, approx. 20 km west of Sangerhausen, and 20 km east of Nordhausen. Kelbra is part of the ''Verbandsgemeinde' ...

in the region known as the

Goldene Aue The Goldene Aue (, "golden lowland", also " ... bottom" or " ... meadow" / " ... pasture", with "Au referring to a low-lying area, often a wetland) is a valley in eastern Germany, in the states Thuringia and Saxony-Anhalt. It is situated between ...

between

Nordhausen Nordhausen may refer to: *Nordhausen (district), a district in Thuringia, Germany ** Nordhausen, Thuringia, a city in the district ** Nordhausen station, the railway station in the city *Nordhouse, a commune in Alsace (German: Nordhausen) * Narost, ...

in the west and

Sangerhausen Sangerhausen () is a town in Saxony-Anhalt, central Germany, capital of the district of Mansfeld-Südharz. It is situated southeast of the Harz, approx. east of Nordhausen, and west of Halle (Saale). About 26,000 people live in Sangerhausen ( ...

in the east. It is located in the district of

Mansfeld-Südharz Mansfeld-Südharz is a district in Saxony-Anhalt, Germany. Its area is . History The district was established by merging the former districts of Sangerhausen and Mansfelder Land as part of the reform of 2007. In the German parliament, the Bu ...

(

) on the northwestern end of the

Kyffhäuser The Kyffhäuser (,''Duden - Das Aussprachewörterbuch, 7. Auflage (German)'', Dudenverlag, sometimes also referred to as ''Kyffhäusergebirge'') is a hill range in Central Germany, shared by Thuringia and Saxony-Anhalt, southeast of the Harz mou ...

hills. It is only a few kilometres from the border with the state of

Thuringia Thuringia (; officially the Free State of Thuringia, ) is one of Germany, Germany's 16 States of Germany, states. With 2.1 million people, it is 12th-largest by population, and with 16,171 square kilometers, it is 11th-largest in area. Er ...

and impounds the river system of the

into the Kelbra Reservoir. Its main and auxiliary barriers are

earth-fill dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface ...

s made of

gravel Gravel () is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentation, sedimentary and erosion, erosive geological processes; it is also produced in large quantities commercially as crushed stone. Gr ...

and binding material (''Erdstoffen''). Both have a sloping internal grout curtain of

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...

on the water side. The crest of the main dam is 4,066 m long and 7 m above the valley floor; the acute-angled auxiliary dam is 3,379 m long. On the southern shore of the lake is the Numburg Cave.

Reservoir

The Kelbra

Reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

lies on the river Helme behind the Kelbra Dam at the northwestern foot of the Kyffhäuser hills. It is located within the Goldene Aue, mainly in the district of

(

); only a small area in its extreme southwestern sector, which is on the border of the

Kyffhäuserkreis The Kyffhäuserkreis is a district in the northern part of Thuringia, Germany. Neighboring districts are the districts Mansfeld-Südharz, Saalekreis and Burgenlandkreis in Saxony-Anhalt, and the districts Sömmerda, Unstrut-Hainich-Kreis and E ...

and Nordhausen districts, lies in Thuringia, which touches its southwestern

shore A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...

. Initially only a green - i.e. normally dry - flood retention basin was planned. In the event, however, a full dam was built in order to create a permanent reservoir, and an auxiliary dam, in order to provide a basin that absorbed the bulk of the Helme river system in the event of high water. As a result, there are two adjacent basins, the lower one being permanently impounded – i.e. as a permanent lake – a gauge on the lake indicating a height of , a storage volume of 12.3 million m³ and a surface area of about 600 ha. The upper basin, which is bordered on its western and northwestern shores by arable and

pasture Pasture (from the Latin ''pastus'', past participle of ''pascere'', "to feed") is land used for grazing. Types of pasture Pasture lands in the narrow sense are enclosed tracts of farmland, grazed by domesticated livestock, such as horses, c ...

land, is only impounded during times of high water. Together, both basins have a volume of 35.6 million m³, of which 23 million m³ is exclusive flood control capacity. Following the completion of the trial impounding of the Kelbra Reservoir, which lasted until 1969, it was officially taken into service. The lake is used extensively for

tourist Tourism is travel for pleasure, and the commercial activity of providing and supporting such travel. UN Tourism defines tourism more generally, in terms which go "beyond the common perception of tourism as being limited to holiday activity on ...

purposes and has facilities for

sailing Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, Windsurfing, windsurfer, or Kitesurfing, kitesurfer), on ''ice'' (iceboat) or on ''land'' (Land sa ...

and

windsurfing Windsurfing is a wind-propelled water sport that is a combination of sailing and surfing. It is also referred to as "sailboarding" and "boardsailing", and emerged in the late 1960s from the Californian aerospace and surf culture. Windsurfing gain ...

, a beach for swimming, a

campsite Campsite, campground, and camping pitch are all related terms regarding a place used for camping (an overnight stay in an outdoor area). The usage differs between British English and American English. In British English, a ''campsite'' is an ...

boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size or capacity, its shape, or its ability to carry boats. Small boats are typically used on inland waterways s ...

and

bicycle A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered transport, human-powered or motorized bicycle, motor-assisted, bicycle pedal, pedal-driven, single-track vehicle, with two bicycle wheel, wheels attached to a ...

hire, a

petting zoo A petting zoo (also called a children's zoo, children's farm, or petting farm) features a combination of domesticated animals and some wild species that are docile enough to touch and feed. In addition to independent petting zoos, many general ...

a waterslide and, near the lake, various

inn Inns are generally establishments or buildings where travelers can seek lodging, and usually, food and drink. Inns are typically located in the country or along a highway. Before the advent of motorized transportation, they also provided accomm ...

s and other facilities.

Internationally important bird habitat

The reservoir is of international importance as a result of the variety of birds found on and around its waters, which, in terms of species as well as sheer numbers exceeds those settling on comparable stretches of water. For example, the following birds can regularly be observed here:

duck Duck is the common name for numerous species of waterfowl in the family (biology), family Anatidae. Ducks are generally smaller and shorter-necked than swans and goose, geese, which are members of the same family. Divided among several subfam ...

(e.g.

mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...

teal alt=American teal duck (male), Green-winged teal (male) Teal is a greenish-blue color. Its name comes from that of a bird—the Eurasian teal (''Anas crecca'')—which presents a similarly colored stripe on its head. The word is often used ...

pochard Pochard is a common name used for several species of diving ducks: *Four species in the genus ''Aythya'': ** Common pochard, ''Aythya ferina'' ** Baer's pochard, ''Aythya baeri'' ** Ferruginous pochard, ''Aythya nyroca'' ** Madagascar pochard, ' ...

wader 245px, A flock of Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflats in order to foraging, ...

s ( peewit,

snipe A snipe is any of about 26 wading bird species in three genera in the family Scolopacidae. They are characterized by a very long, slender bill, eyes placed high on the head, and cryptic/ camouflaging plumage. ''Gallinago'' snipe have a nearly ...

, redshank,

curlew The curlews () are a group of nine species of birds in the genus ''Numenius'', characterised by their long, slender, downcurved bills and mottled brown plumage. The English name is imitative of the Eurasian curlew's call, but may have been infl ...

), divers (

great crested grebe The great crested grebe (''Podiceps cristatus'') is a member of the grebe family of water birds. The bird is characterised by its distinctive appearance, featuring striking black, orange-brown, and white plumage, and elaborate courtship displa ...

little grebe The little grebe (''Tachybaptus ruficollis''), also known as dabchick, is a member of the grebe family of water birds. The genus name is from Ancient Greek ''takhus'' "fast" and ''bapto'' "to sink under". The specific ''ruficollis'' is from Latin ...

black-necked grebe The black-necked grebe or eared grebe (''Podiceps nigricollis'') is a member of the grebe family (biology), family of water birds. It was described in 1831 by Christian Ludwig Brehm. Its breeding plumage features distinctive ochre-coloured feat ...

rails Rail or rails may refer to: Rail transport *Rail transport and related matters * Railway track or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' (1967 fi ...

(

water rail The water rail, western water rail or European water rail (''Rallus aquaticus'') is a bird of the rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are migratory, but this ...

coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usual ...

mute swan The mute swan (''Cygnus olor'') is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home to ...

black-headed gull The black-headed gull (''Chroicocephalus ridibundus'') is a small gull that breeds in much of the Palearctic in Europe and Asia, and also locally in smaller numbers in coastal eastern Canada. Most of the population is migratory and winters fu ...

and

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'' and various iterations of ''rared ...

( little bittern and

Eurasian bittern The Eurasian bittern or great bittern (''Botaurus stellaris'') is a wading bird in the bittern subfamily (Botaurinae) of the heron family Ardeidae. There are two subspecies, the northern race (''B. s. stellaris'') breeding in parts of Europe and ...

). In addition

white-tailed eagle The white-tailed eagle (''Haliaeetus albicilla''), sometimes known as the 'sea eagle', is a large bird of prey, widely distributed across temperate Eurasia. Like all eagles, it is a member of the family Accipitridae (or accipitrids) which also ...

osprey The osprey (; ''Pandion haliaetus''), historically known as sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor, reaching more than in length and a wingspan of . It ...

, peregrine and

cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) ado ...

may also be spotted here. The variety of birds occurring during migration is particularly impressive. Up to 10,000 crane stop over on the reservoir and large flocks of larks and finches may be seen passing through. Since 1978 the reservoirs has been placed under the protection of the

Ramsar Convention The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar site, Ramsar sites (wetlands). It is also known as the Convention on We ...

as an internationally important retreat for birds.

Sources

* ''Talsperren in Thüringen.'' Thüringer Talsperrenverwaltung, Autorenkollegium, 1993

External links

Kelbra Dam

{{in lang, de Dams in Saxony-Anhalt Dams in the Harz Bird reserves in Saxony-Anhalt Embankment dams Dams completed in 1966 RKelbra

Purpose

Dam

Reservoir

Internationally important bird habitat

See also

Sources

External links