What is the main reason dams and canals were built in Washington in the early 1900s?

For the development of navigation, flood control, irrigation, and hydropower

Explanation:

The main reason dams and canals were built in Washington in the early 1900s was "for the development of navigation, flood control, irrigation, and hydropower."

This is evident in the fact that in 1925 when the US Congress approved the U.S. Army Corps of Engineers and the Federal Power Commission to jointly "...prepare and submit to Congress an estimate of the cost of making such examinations, surveys or other investigations... for efficient development of the potential water power, the control of floods and the needs of irrigation."

The report was eventually realized during the Franklin D. Roosevelt administration as the United States president

this question makes no sense dude

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.