Highway 89 closed 25 miles south of Page
A road collapse south of Page has closed US-89 until further notice. US-89 is closed northbound at US-89A. In Page, US 89 is closed at the junction with State Route 98. Traffic is being detoured around closure utilizing SR-98 & US-160. US-89A is open. More »
Quagga Mussel Monitoring Update
Find the latest on Invasive Mussel Monitoring news. Click on this link: More »
Lake Powell Mercury Consumption Advisory
Public Health, Environmental and Wildlife agencies from Utah and Arizona are jointly issuing a mercury fish advisory for striped bass in the southern portion of Lake Powell from Dangling Rope marina to the dam. Read more here: More »
The Colorado River Compact
In the arid Southwest, water is of vital importance and the Colorado River is the principal carrier of this most precious resource. Seven states-and Mexico-receive water from the Colorado River. The seven states are divided into the Upper and Lower Colorado River Basin with the mid-point at Lees Ferry, Arizona, approximately 15 miles (24km) below Glen Canyon Dam.
Glen Canyon Dam
Glen Canyon Dam was authorized by Congress in 1956 to provide water storage in the Upper Colorado River Basin. The result was Lake Powell, the second largest man-made reservoir in the United States. (Lake Mead is the largest.) It took seventeen years for the lake to reach its full pool level of 3700 feet (1128m) above sea level.
Glen Canyon Dam has created a new Colorado River. Before the dam was built, water temperatures in the river fluctuated seasonally from 80°F (26°C) in the summer to near freezing in the winter. Now, the water temperature below the dam averages 46°F (7°C) year-round. The Colorado River was once filled with silt and sediment. Now, the river deposits its load of silt as it enters Lake Powell near Hite, Utah. Water released from the dam is clear and the Colorado River is muddy only when downstream tributaries contribute sediment.
Did You Know?
Be careful what you breathe. Boat generators, engines, and gas appliances produce deadly carbon monoxide gases. Ensure proper ventilation. Don't swim, sit, or work near exhaust.