Dams

NOTES: This drawing was probably produced by a local draughtsman for Charles Felix Marie Texier for use in his publications and later presented to the RIBA.

NOTES: This gravity dam was built by the British in 1889-1902 and was the first dam to be built at Aswan. The project was designed by Sir William Willcocks and involved several eminent engineers including Sir Benjamin Baker and Sir John Aird, whose firm, John Aird & Co., was the main contractor. The initial design was soon found to be inadequate and the height of the dam was raised in two phases, in 1907-1912 and 1929-1933.

NOTES: This dam was built by ENEL (Ente Nazionale per l'Energia elettrica) the Italian energy provider. On completion the valley was flooded to create the artifical lake and reservoir, Lago di Fedaia.

NOTES: The emissarium, a very early Roman work, is a tunnel cut through the solid rock of the rim of the crater lake of Albano maintaining a constant water level.

NOTES: The emissarium, a very early Roman work, is a tunnel cut through the solid rock of the rim of the crater lake of Albano maintaining a constant water level.

NOTES: The emissarium, a very early Roman work, is a tunnel cut through the solid rock of the rim of the crater lake of Albano maintaining a constant water level.

NOTES: The Barrier, at the mouth of the River Hull, was opened in 1980 and refurbished in 2010. It is the second largest flood barrier in the UK.

NOTES: The island was artificially enlarged in 1913-1916 with the construction of the Smichov floodgates (1913+óÔé¼ÔÇ£1916).

NOTES: The Elan Valley scheme was a project to supply clean water to Birmingham, some 20 miles away. The proposal was to dam the Elan and Caerwen rivers and originally three dams were constructed in Elan Valley by engineers Gray and Mansergh between 1893-1904. These comprised the Caban Coch with Garreg-ddu, Pen-y-garreg and Craig Coch dams. Three more were proposed in the Caerwen Valley, but postponed owing to the Second World War and with improvements to materials and engineering meant a much larger concrete dam could be built higher up the valley (the Caerwen dam officially opened by Queen Elizabeth II in 1952).

NOTES: The Elan Valley scheme was a project to supply clean water to Birmingham, some 20 miles away. The proposal was to dam the Elan and Caerwen rivers and originally three dams were constructed in Elan Valley by engineers Gray and Mansergh between 1893-1904. These comprised the Caban Coch with Garreg-ddu, Pen-y-garreg and Craig Coch dams. Three more were proposed in the Caerwen Valley, but postponed owing to the Second World War and with improvements to materials and engineering meant a much larger concrete dam could be built higher up the valley (the Caerwen dam officially opened by Queen Elizabeth II in 1952).