41. Grand Coulee Dam is a solid gravity dam and Braddock Locks & Dam is a hollow gravity dam. 42. Grand Coulee Dam is a solid gravity dam and Braddock Locks & Dam is a hollow gravity dam . 43. The most frequent dam types were earth-or rock-filled embankment dams and masonry gravity dams . 44. At that time, the Wachusett Reservoir Dam was the largest gravity dam in the world as well. 45. The lower reservoir was formed by building another concrete gravity dam across the natural basin of Afon Ystradau. 46. At tall, it is the largest gravity dam in Japan after the Taishakugawa Dam in Hiroshima Prefecture. 47. With a height of, it is the tallest hollow-core concrete gravity dam in the world. 48. The modern identification of its site is uncertain, but may rather point to a common gravity dam . 49. The actual dam is a curved gravity dam made of rubble stone and based on the Intze Principle. 50. Located at the base of Harpers Point, the dam was to be a high concrete gravity dam .
