The Koyna dam is built across the Koyna River.
Akosombo dam.
A dam is built across a river to control the flow of water.
The Hoover Dam
bhakra dam is located on river satluj which is located in punjab.
The Aliyar Dam was constructed during 1959-1969 across the Aliyar river.
A dam is way to control floods by putting a large wall across a river
The Maharana Pratap Sagar dam is built across the Beas River, in the state of Himachal Pradesh in India.
Nagarjun Sagar Dam is the largest masonry dam of the world built across the river Krishna in Nalgonda district of Andhra Pradesh in India.
The Hirakud Dam is the World's largest earthen dam. it is built across the Manhanadi River in India.
The Colorado River
It was called Boulder Dam.