Because Europe recolonized Africa for more expansion.
Grand Coulee Dam<span> is a gravity </span>dam<span> on the Columbia River in the U.S. state of Washington, built to produce hydroelectric power and provide irrigation water. It was constructed between 1933 and 1942, originally with only two powerhouses.</span>
he was an american founding father who took part in writing the declaration of independence and he was the 3rd president of the US, hope this helps