Final answer:
The Colorado River has numerous dams, with the Hoover Dam being the most notable. While the question seeks the number of major dams on the Colorado River, the provided information highlights the significance of several key dams without an exact count.
Step-by-step explanation:
The Colorado River is known for the numerous dams constructed along its course to manage water distribution, control floods, and generate hydroelectric power. Among these, the most famous is the Hoover Dam, also known as Boulder Dam, which was the first major dam on the river and is a marvel of modern engineering. While this question seems to ask for a specific number of major dams along the Colorado River today, it is important to note that several key dams include Hoover Dam, Glen Canyon Dam, Parker Dam, and Davis Dam. However, these are just a few, and there are numerous smaller dams and diversions that also play significant roles in the management of the Colorado River's resources.