Near Page in Coconino County, Arizona — The American Mountains (Southwest)
Rock Bolts / High Scaling
Reclamation: Managing Water in the West
Since Navajo sandstone tends to fracture vertically, rock bolts lock rock slabs together, thereby minimizing rock falls into the canyon. These bolts extend from 45 to 75 feet (14-23 meters) into the canyon wall. They are assembled in 10 foot (3 meter) sections. An expansion device on the end ties the bolt solidly to the wall. The plate is 14 inches (36 centimeters) square and 2 inches (5 centimeters) thick. The bolts are cement grouted into the wall.
High scalers of the past are now highly trained rope access technicians. Some of the work is similar, installing chain mesh and installing and checking rock bolts. Other work is more technical, including performing inspections of the dam and abutments, spillway tunnels, penstocks, and outlet pipes.
Erected by Bureau of Reclamation.
Location. 36° 56.204′ N, 111° 29.17′ W. Marker is near Page, Arizona, in Coconino County. Touch for map. Marker is on top of the Glen Canyon Dam, off US Route 89 at the Colorado River. Marker is in this post office area: Page AZ 86040, United States of America.
Other nearby markers. At least 8 other markers are within walking distance of this marker. Hydroelectric Power - A Green and Renewable Energy Source (here, next to this Concrete Bucket / Concrete Core Sample (within shouting distance of this marker); Intake Structures (within shouting distance of this marker); Turbine Runner (about 300 feet away, measured in a direct line); Colorado River Storage Project / Glen Canyon Dam (about 400 feet away); Bureau of Reclamation Memorial Fountain (about 400 feet away); Dinosaur Tracks (about 400 feet away); Glen Canyon Dam (about 400 feet away). Touch for a list and map of all markers in Page.
Also see . . .
1. Glen Canyon Dam. (Submitted on February 17, 2011, by William Fischer, Jr. of Scranton, Pennsylvania.)
2. Glen Canyon National Recreation Area. (Submitted on February 17, 2011, by William Fischer, Jr. of Scranton, Pennsylvania.)
3. How Rock Bolts Work. (Submitted on February 17, 2011, by William Fischer, Jr. of Scranton, Pennsylvania.)
Categories. • Charity & Public Work • Industry & Commerce • Man-Made Features • Waterways & Vessels •
Credits. This page was last revised on June 16, 2016. This page originally submitted on February 17, 2011, by William Fischer, Jr. of Scranton, Pennsylvania. This page has been viewed 1,093 times since then and 5 times this year. Photos: 1, 2, 3, 4, 5. submitted on February 17, 2011, by William Fischer, Jr. of Scranton, Pennsylvania.