Title: Carrigadrohid hydroelectric power station
Content: Carrigadrohid hydroelectric power station Carrigadrohid hydroelectric power station is a hydroelectric plant located on the River Lee in County Cork, Ireland. It is owned and operated by the ESB Group. The Carrigadrohid hydroelectric plant, along with its sister plant constructed downstream on the River Lee at Inniscarra, formed the fourth major hydroelectric development undertaken by ESB. Construction of the reinforced concrete gravity dam started in 1952 and was complete in 1957. The dam is long and high, and operates with an average head of . It is constructed of nine blocks, each between in length, and is fitted with three

Title: Shannon hydroelectric scheme
Content: head-race canal, from Parteen Villa north of O'Briens Bridge to about a mile north of Limerick city. This length of river, especially that running past Castleconnell and the Falls of Doonass was in the nineteenth and early twentieth centuries world-famous for fishing, particularly Salmon fishing. The diverting of water to the power station had a disastrous effect on this, for two main reasons: Initially, there was no fish pass at Ardnacrusha to allow the salmon to migrate further up the river; this was later rectified. Secondly, the reduction in water flow down the natural channel encouraged more fish to either

Title: Shannon hydroelectric scheme
Content: Shannon hydroelectric scheme The Shannon hydroelectric Scheme was a major development by the Irish Free State in the 1920s to harness the power of the River Shannon. Its product, the Ardnacrusha power plant, is a hydroelectric power station which is still producing power today and is located near Ardnacrusha within County Clare approximately from the Limerick border. It is Ireland's largest river hydroelectric scheme and is operated on a purpose built headrace connected to the River Shannon. The plant includes fish ladders so that returning fish, such as salmon, can climb the river safely past the power station. Completed within

Title: Rivers of Ireland
Content: flow) in cubic metres per second. The longest river in Ireland is the River Shannon, at . The river develops into three lakes along its course, Lough Allen, Lough Ree and Lough Derg. Of these, Lough Derg is the largest. The Shannon enters the Atlantic Ocean at the Shannon Estuary. Other major rivers include the River Liffey, River Lee, River Swilly, River Foyle, River Lagan, River Erne, River Blackwater, River Nore, River Suir, River Barrow (The Three Sisters), River Bann, River Slaney, River Boyne, River Moy and River Corrib. Lengths obtained from the Ordnance Survey of Ireland: "Rivers and their

Title: Shannon hydroelectric scheme
Content: minimum flow at all. This has led to a substantially dried-up riverbed. The most obvious result on the river south of Parteen Villa always being kept at summer levels is the silting of many of the old salmon pools, and the growth of trees and bushes in many parts of the former riverbed, thus significantly altering both the appearance and ecosystem of the river. When built, Ardnacrusha had the capacity to supply power for the entire country. Currently, it accounts for around 2-3% of the ESB's overall power output. Given the small overall amount of power produced per cubic meter,

Question: What is Ireland's longest river and greatest source of electric power?
Answer: Shannon