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The Glen Canyon Dam sends water and power to people in western states including, Arizona, Colorado, Idaho, Nevada, Texas, Utah, and Wyoming. It is in Page, Arizona and was built to cut off water from the Colorado River. The United States National Park Service gives tours of the Dam, but anyone can drive over the bridge of the Dam, park, and view it, with the Colorado River on one side and Lake Powell on the other.

  • Glen Canyon Dam under construction in 1963. It shows the dividing of the Colorado River. When looking at other pictures, I thought the dam was directly under the bridge, however this picture shows that the bridge is in front of the dam. The bridge was initially for the delivery trucks in order to bring the materials and equipment over the canyon in a short amount of time. An interesting factor of this picture is that it gives you a view at what the dam looked like without the water. Now that it has water, we obviously cannot see what is looks like from that point of view.
  • Lake Powell reached full capacity in 1980. It took 17 years to fill and when completed, the elevation was 3,700 feet and the total capacity was 26 million acre-feet. At this time, the water was blue and green on the Lake Powell side, but on the other side it was dark brown. This indicates there is not a lot of water on the other side. It is mixing with the dirt causing the brown color to show.
  • Overview of Glen Canyon Dam. Originally, the bridge was built for truck drivers with materials and equipment for the dam, but now it is for people to drive over in order to get a closer look at the dam. There is the visitor center which is the area with the green grass and parking lot. Visitors can also drive and park on the Dam if they want to get an even closer view. On the bottom right corner of the picture there are spillway tubes where large amounts of water flow out through when released. The powerplant for the hydropower generators is in between the dam and the water.
  • Lake Powell overview of what it looks like. Many people rent houseboats for vacation. This water is made up of the Colorado River and was formed because of the Glen Canyon Dam.
  • Water flowing out of the tubes of Glen Canyon Dam. This is showing an high-flow experiment they did March 5th, 2008. They did this to see what would happen if they released a lot of water.
  • Glen Canyon Dam on March 5th, 2008. As you can tell there is a lot of water coming out of the tubes from the high-flow experiment.

The United States Bureau of Reclamation engineers and geologists were looking for a site to build the Dam and Page, Arizona was the perfect place. On April 11, 1956, The Colorado River Storage Project Act was authorized by Congress which led to the construction of the Glen Canyon Dam. The engineers and geologists could not begin construction until a temporary dam site was built. The water flowed through diversion tunnels that were dug out on each side of Glen Canyon. The construction started on October 15, 1956 when the explosion signal was pressed by President Dwight D. Eisenhower. The Bureau of Reclamation was the government entity that completed the Dam in 1963. The Dam cut off the water of the Colorado River which formed the second-largest reservoir in the United States, Lake Powell. Glen Canyon Dam and Lake Powell have destroyed the Glen and Grand Canyon’s ecosystem because of the 1922 Colorado River Compact.

The Colorado River Storage Project Act was created to control and utilize the Colorado River flow for the States of the Upper and Lower Basins. The Colorado River Compact and the Upper Colorado River Basin Compact controlled the floods and the hydroelectric power. One important problem is that the 1922 Colorado River Compact overestimated the river flow, underestimated the future demand for water, and did not forecast climate change. There is a shortage in the Colorado River water system of approximately 1 million acre-feet a year and because of that it has been predicted that Lake Powell and Lake Mead, in Western Arizona, will never fill to capacity again. This is a problem because each year the Upper Basin needs to give 8.23 million acre-feet of the Colorado River’s water to the Lower Basin area and Mexico.

When the Bureau of Reclamation decided that this dam was going to be used to produce power, they did not realize what it would end up affecting. The change in water flow has caused the Colorado River below the dam to fluctuate in the water elevation. Since there was a fluctuation it affects the recreation, aquatic resources, and riparian resources. The United States Bureau of Reclamation authorized the Glen Canyon Environmental Studies (GCES) because there was no information about what the Dam was going to do to our environment. After the GCES, it became clear that the Colorado River between Glen Canyon Dam and Lake Mead was being affected because of the Glen Canyon Dam. The studies expressed that there needed to be more control of the flow of water but also still have maximum power. There was an environmental impact statement that said modified low fluctuating flows was preferred and it was implemented in order to improve the ecosystem of the Colorado River. 

Over the years, the change of the ecosystem and environment of Glen Canyon Dam has taken a toll on our society. The water level in 1999 was much higher and the watercolor was clear and dark blue. Now, the river has a green-brown shade and the water level is much lower. Since the temperature has been rising, the river will only worsen over time because hot weather means more electricity, which means more water is needed. When the temperature is hotter, additional evaporation occurs which declines the excess of water. Evaporation causes our ecosystem to endanger the animals and insects living in and around the river. There are many species that rely on the Colorado River water in order to survive. The reproduction of insects and animals is disrupted because when the river lowers, they are left to die which affects the food supply for terrestrial animals. A steady flow would help to improve the ecosystem and increase the number of insects and animals.

The Glen Canyon Dam was created in order to get water and electricity to those in the west. What has been learned is that some people did not expect problems to evolve because of it. Many people believe that the Dam should be destroyed but it is a historical site for those who live in the west. Those in the area travel to Lake Powell during the summer and bring their boats and water-crafts or rent houseboats, so much of the population would be upset if Lake Powell ceased to exist. Also, those who live in Page, Arizona would lose the city’s livelihood because the Dam has created numerous employment opportunities. For those people who do not live in the west or have a different meaning of the area, they see the dam as an unimportant factor that is hurting our society. What people need to understand is that if Glen Canyon Dam was destroyed, then tremendous flooding would occur, which would be extremely destructive. Today many groups, such as GCES, are working on the ecosystem and environmental factors of the Dam, trying to correctly fix all issues by not destroying Glen Canyon Dam.

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United States, Bureau of Reclamation. Operation of Glen Canyon Dam: Colorado River Storage Project, Arizona: Final Environmental Impact Statement. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Reclamation, 1995.

Wegner, David L. “10/ A Brief History of the Glen Canyon Environmental Studies.” Colorado River Ecology and Dam Management: Proceedings of a Symposium, May 24-25, 1990, Santa Fe, New Mexico, National Academy Press, 1991, pp. 226–238.

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