The Somerset Dam is a mass concrete

gravity dam A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. ...

with a gated spillway across the Stanley River in

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

, Australia. It is within the locality of

Somerset Dam The Somerset Dam is a mass concrete gravity dam with a gated spillway across the Stanley River in Queensland, Australia. It is within the locality of Somerset Dam in the Somerset Region in South East Queensland. The main purpose of the dam i ...

in the

Somerset Region The Somerset Region is a local government area located in the West Moreton region of South East Queensland, Australia, about northwest of Brisbane and centred on the town of Esk. It was created in 2008 from a merger of the Shire of Esk and th ...

South East Queensland South East Queensland (SEQ) is a bio-geographical, metropolitan, political and administrative region of the state of Queensland in Australia, with a population of approximately 3.8 million people out of the state's population of 5.1 million. ...

. The main purpose of the dam is the

supply Supply may refer to: *The amount of a resource that is available **Supply (economics), the amount of a product which is available to customers **Materiel, the goods and equipment for a military unit to fulfill its mission *Supply, as in confidenc ...

potable water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ag ...

for the

Brisbane Brisbane ( ) is the capital and most populous city of the Australian state of Queensland, and the third-most populous city in Australia and Oceania, with a population of approximately 2.6 million. Brisbane lies at the centre of the Sou ...

, Gold Coast and

Logan City Logan City is a local government area situated within the south of the Brisbane metropolitan area in South East Queensland, Australia. Situated between the City of Brisbane to the north and the City of Gold Coast to the south, the City also bor ...

regions. Additionally, the dam provides for

flood mitigation In environmental engineering, the flood mitigation involves the management and control of flood water movement, such as redirecting flood run-off through the use of floodwalls and flood gates, rather than trying to prevent floods altogether. It ...

, recreation and for the generation of

hydroelectricity Hydroelectricity, or hydroelectric power, is 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 renewable sources combined and ...

. The impounded

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including control ...

is called Lake Somerset. The dam, lake and surrounding village of Somerset are named in honour of Henry Plantagenet Somerset, a local grazier and Member of the

Legislative Assembly of Queensland The Legislative Assembly of Queensland is the sole chamber of the unicameral Parliament of Queensland established under the Constitution of Queensland. Elections are held every four years and are done by full preferential voting. The Assembly ...

who represented the seat of

Stanley Stanley may refer to: Arts and entertainment Film and television * ''Stanley'' (1972 film), an American horror film * ''Stanley'' (1984 film), an Australian comedy * ''Stanley'' (1999 film), an animated short * ''Stanley'' (1956 TV series) ...

from 1904 until 1920.

Location and features

The dam is located approximately northwest of in the

and north of . The concrete dam structure is high and long. The dam wall holds back the reservoir when at full capacity. However, only is used for water supply and the remainder used for flood mitigation. From a

catchment area In human geography, a catchment area is the area from which a location, such as a city, service or institution, attracts a population that uses its services and economic opportunities. Catchment areas may be defined based on from where people are ...

of that includes much of the western slopes of the

D'Aguilar National Park D'Aguilar National Park is a national park in Queensland, Australia. It contains the D'Aguilar Range and is located along the northwest of the Brisbane metropolitan area. The park is traversed by the winding scenic Mount Nebo Road and Mount Glo ...

, the dam creates Lake Somerset at an elevation of

above sea level Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The comb ...

, with a surface area of . The gated spillway has a discharge capacity of . Built under the supervision of the Bureau of Industry, management of the dam was transferred to SEQ Water in July 2008 as part of a

water security Water security is the focused goal of water policy and water management. A society with a high level of water security makes the most of water's benefits for humans and ecosystems and limits the risk of destructive impacts associated with water. ...

project in the South East Queensland region, known as the South East Queensland Water Grid. A small hydroelectric power station is located adjacent to the dam wall. A water level of 90% is the optimum capacity for keeping

evaporation Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. High concentration of the evaporating substance in the surrounding gas significantly slows down evaporation, such as when humidi ...

rates to a minimum. Dam operators discharge water into the Wivenhoe Dam downstream to hold Somerset at this level when inflows are occurring. The dam is home to the Somerset Dam Power Station.

Construction

The site was first suggested for the location of a dam by Henry Somerset, the owner of Caboonbah Homestead, after the

1893 Brisbane flood The 1893 Brisbane flood, occasionally referred to as the Great Flood of 1893 or the Black February flood, occurred in 1893 in Brisbane, Queensland, Australia. The Brisbane River burst its banks on three occasions in February 1893. It was the ...

s caused severe damage to

Brisbane River The Brisbane River is the longest river in South East Queensland, Australia, and flows through the city of Brisbane, before emptying into Moreton Bay on the Coral Sea. John Oxley, the first European to explore the river, named it after the Gov ...

valley residents downstream. A commission of enquiry recommended Stanley Gorge as the site for a dam in 1928, but it was not until 1933 that the Forgan Smith

Labor Labour or labor may refer to: * Childbirth, the delivery of a baby * Labour (human activity), or work ** Manual labour, physical work ** Wage labour, a socioeconomic relationship between a worker and an employer ** Organized labour and the labour ...

Government A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a ...

adopted the reservoir's construction as a major job creation project to counter job losses caused by the

Great Depression The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagion ...

. Construction began in 1935. Worker's cottages had to be built and other facilities were constructed to attract construction workers and their families to the area. By 1942 the dam was almost complete when workers were diverted to the

war War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias. It is generally characterized by extreme violence, destruction, and mortality, using regular o ...

effort, with many being redeployed to construct the

Cairncross Dockyard The Cairncross Dockyard was a shipyard beside the Brisbane River at Morningside, City of Brisbane, Queensland, Australia. It included one of Australia's largest graving docks with an 8.5 metre deep water access, capable of taking Panamax ves ...

in Brisbane. Work on the dam recommenced in 1948. Opened in 1953 when structural work was finished, it was not until 1958 that the dam was officially named after Henry Somerset and the next year before all work related to the dam, including the

hydroelectric Hydroelectricity, or hydroelectric power, is 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 renewable sources combined and ...

power station A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many pow ...

was complete.

Recreation

There are two public access areas on Somerset Dam, Kirkleigh and The Spit. Both locations have multi-lane, concrete

boat ramp A slipway, also known as boat ramp or launch or boat deployer, is a ramp on the shore by which ships or boats can be moved to and from the water. They are used for building and repairing ships and boats, and for launching and retrieving small ...

s with facilities for day-trippers. Camping is permitted and caravans are catered for at Kirkleigh and below the dam wall at Somerset Park in the small town of Somerset Dam. During busy periods the two camping locations can be filled to capacity with room for a maximum of 2,200 campers at Kirkleigh and 800 at Somerset Park. Lake Somerset Holiday Park's Kirkleigh campground also features cabin accommodation at the waterfront and direct access to the dam from a grassy spit. The dam contains of navigable waterway.

Fishing

The lake is a popular fishing destination, one of the top five fishing spots in the state. Fish species found in the dam include Australian bass, golden perch, silver perch, bony bream, eel-tailed catfish, spangled perch, Mary River cod, snub nosed gar, Queensland lungfish and saratoga. A stocked impoundment permit is required to

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...

in the dam. SomersetFromAbove

Engineering heritage award

The dam is listed as an Engineering Heritage National Landmark by

Engineers Australia Engineers Australia (EA) is an Australian professional body and not-for-profit organisation whose purpose is to advance the science and practice of engineering for the benefit of the community. Engineers Australia is Australia's recognized or ...

as part of its Engineering Heritage Recognition Program.

References

External links

Current dam level

* * ttps://web.archive.org/web/20100923174128/http://somersettourism.com.au/attractions1.php Somerset Tourism Natural Attractions {{DEFAULTSORT:Somerset Buildings and structures in Somerset Region Somerset, Lake Gravity dams

Dams completed in 1959 1959 establishments in Australia Energy infrastructure completed in 1959 Recipients of Engineers Australia engineering heritage markers