How long and wide is the Three Gorges Dam?

The Three Gorges Dam is a concrete gravity dam with a length of 2,335 meters, a bottom width of 115 meters, a top width of 4 meters, a crest elevation of 185 meters, a maximum pouring dam height of 181 meters and a normal water level of 175 meters above sea level. The water level downstream of the dam is about 66 meters above sea level, the lowest navigable water level below the dam is 62 meters above sea level, and the designed maximum drop between the upstream and downstream of the navigable lock is 113 meters.

the earthwork excavation and filling volume of the main building of the project is about 134 million cubic meters, the concrete pouring volume is about 27.94 million cubic meters, and the steel consumption is 593, tons [21]. Among them, the installation of metal structures accounted for 256,5 tons, and the production and installation of steel bars accounted for 463, tons.

the total length of the reservoir is more than 6 kilometers, the dam axis is 2,39.47 meters, the average width of the water surface is 1.1 kilometers, the total area is 1,84 square kilometers, and the total storage capacity is 39.3 billion cubic meters, of which the flood storage capacity is about 22.15 billion cubic meters, and the regulation capacity is seasonal.

Extended information:

The Three Gorges Dam is designed to be composed of multiple functional modules, namely, from left to right (facing downstream), permanent lock, ship lift, sand discharge channel (temporary lock), left bank dam and power station, flood discharge dam section, right bank dam and power station, mountain underground power station, etc.

regarding the dam height, there were three schemes in the planning: low dam, middle dam and high dam. In 195s, under the influence of Soviet experts, many parties supported the high dam scheme. By the early 198s, the idea of "short, flat and fast" was the mainstream, so the low dam scheme was very popular. However, for the sake of improving the shipping conditions in Chongqing, all parties finally agreed to build the Middle Dam.

Baidu Encyclopedia-Three Gorges Hydropower Station