Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt. Its construction was the result of a massive effort involving thousands of workers, and cost over 100 lives. It was referred to as the Hoover Dam after President Herbert Hoover in bills passed by Congress during its construction; it was named the Boulder Dam by the Roosevelt administration. The Hoover Dam name was restored by Congress in 1947.
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, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions.
Lake Travis is a reservoir on the Colorado River in central Texas in the United States.
Lake Austin, formerly Lake McDonald, is a water reservoir on the Colorado River in Austin, Texas. The reservoir was formed in 1939 by the construction of Tom Miller Dam by the Lower Colorado River Authority. Lake Austin is one of the seven Highland Lakes created by the LCRA, and is used for flood control, electrical power generation, and recreation.
The Aswan Dam, or more specifically since the 1980s, the Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. When it was completed, it was the tallest earthen dam in the world, eclipsing the United States' Chatuge Dam. Its significance largely upstaged the previous Aswan Low Dam initially completed in 1902 downstream. Based on the success of the Low Dam, then at its maximum utilization, construction of the High Dam became a key objective of the new regime the Free Officers movement of 1952; with its ability to better control flooding, provide increased water storage for irrigation and generate hydroelectricity, the dam was seen as pivotal to Egypt's planned industrialization. Like the earlier implementation, the High Dam has had a significant effect on the economy and culture of Egypt.
Annaka is a city located in Gunma Prefecture, Japan. As of 31 July 2020, the city had an estimated population of 47,911 in 24,749 households, and a population density of 210 persons per square kilometre. The total area of the city is 276.31 km2 (106.68 sq mi).
Lake Mead is a reservoir formed by Hoover Dam on the Colorado River in the Southwestern United States. It is located in the states of Nevada and Arizona, 24 mi (39 km) east of Las Vegas. It is the largest reservoir in the US in terms of water capacity. Lake Mead provides water to the states of Arizona, California, and Nevada as well as some of Mexico, providing sustenance to nearly 20 million people and large areas of farmland.
A moraine-dammed lake occurs when the terminal moraine has prevented some meltwater from leaving the valley. Its most common shape is that of a long ribbon. Example of moraine dammed lakes include:
Lake Havasu is a large reservoir formed by Parker Dam on the Colorado River, on the border between San Bernardino County, California and Mohave County, Arizona. Lake Havasu City sits on the Arizonan side of the lake with its Californian counterpart of Havasu Lake directly across the lake. The reservoir has an available capacity of 619,400 acre-feet (764,000,000 m3). The concrete arch dam was built by the United States Bureau of Reclamation between 1934 and 1938. The lake's primary purpose is to store water for pumping into two aqueducts. Prior to the dam construction, the area was home to the Mojave people. The lake was named after the Mojave word for blue. In the early 19th century, it was frequented by beaver trappers. Spaniards also began to mine the areas along the river.
Lake Parramatta is a heritage-listed man-made reservoir and a recreational area located in North Parramatta, City of Parramatta, in the Western Sydney region of New South Wales, Australia. The masonry arch-walled dam across Hunts Creek was completed in 1856 to supply water for domestic purposes; and was operational until 1909. The dam has since been decommissioned and the lake and the surrounding nature reserve are a popular recreational area.
A reservoir is an enlarged lake behind a dam. Such a dam may be either artificial, usually built to store fresh water, or it may be a natural formation.
Lake Talquin is a reservoir located on the Ochlockonee River between Leon County and Gadsden County in north Florida. The lake, located about 10 miles (15 km) west of Tallahassee, is south of Interstate 10 and bordered by State Road 20 on the east and State Road 267 on the west.
Millerton Lake is an artificial lake near the town of Friant, about 15 mi (24 km) north of downtown Fresno, California, United States. The reservoir was created by the construction of 319 ft high Friant Dam on the San Joaquin River which, with the lake, serves as much of the county line between Fresno County to the south and Madera County to the north.
Castaic Lake is a reservoir formed by Castaic Dam on Castaic Creek, in the Sierra Pelona Mountains of northwestern Los Angeles County, California, United States, near the town of Castaic.
Lake Mackintosh is a 17.5-kilometre-long (10.9 mi) reservoir with a surface area of 3,100-hectare (7,700-acre) that forms part of the Pieman power development running north–south past Mount Farrell, adjacent to the town of Tullah in Tasmania.
Lake Wyola is a lake located in Shutesbury, Massachusetts, United States.
Lake San Cristobal is a lake in the U.S. state of Colorado. Located in the San Juan Mountains at an elevation of 9,003 feet (2,744 m), the freshwater lake is 2.1 miles (3.4 km) long, up to 89 feet (27 m) deep, has a surface area of 0.52 square miles (1.3 km2), and holds about 11,000 acre-feet (14,000,000 m3) of water. The town of Lake City, a few miles to the north, is named after Lake San Cristobal. The name San Cristóbal means Saint Christopher in the Spanish language. Many old silver mines are near the lake and it is very clean and well kept, and stocked with Rainbow Trout.
