Alternative Title
Paper No. 5.13
Location
St. Louis, Missouri
Date
11 Mar 1998, 10:30 am - 12:30 pm
Abstract
Provo Canyon, located in north central Utah, is known to have landslide hazards for many years. Construction to widen and straighten a 2.5-mile-long section of U.S. 189 known as the “Narrows” commenced in December 1995. This project consists of twin 300-foot-long two-lane tunnels, 3/4 million cubic yards of soil and rock excavation, 60,000 square feet of cast-in-place concrete soil nailed walls, and 90,790 square feet of mechanically stabilized embankment. During excavation for some of the cuts, landslides occurred that required remediation. Cracks were noticed near the northern portal of the tunnels which necessitated immediate stabilization. Observations during construction are presented.
Immediately north of “The Narrows” section of U. S. 189 is an approximate six-mile-long segment called the Upper Provo Canyon project. The project includes a one-mile section of roadway that traverses over some landslides, known as the Hoover Slides, which have been active for at least 60 years. The Hoover Slides are within a thrust fault known as the Deer Creek thrust. From the exploration program, geotechnical and geologic features were identified which permitted the development of probable chronological events of the Hoover Slides and postulated sliding mechanisms responsible for the movements.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Lee, Thomas S. and Brandon, Steven H., "Geotechnical and Geologic Features of U.S. 189 in Provo Canyon, Utah" (1998). International Conference on Case Histories in Geotechnical Engineering. 7.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session05/7
Geotechnical and Geologic Features of U.S. 189 in Provo Canyon, Utah
St. Louis, Missouri
Provo Canyon, located in north central Utah, is known to have landslide hazards for many years. Construction to widen and straighten a 2.5-mile-long section of U.S. 189 known as the “Narrows” commenced in December 1995. This project consists of twin 300-foot-long two-lane tunnels, 3/4 million cubic yards of soil and rock excavation, 60,000 square feet of cast-in-place concrete soil nailed walls, and 90,790 square feet of mechanically stabilized embankment. During excavation for some of the cuts, landslides occurred that required remediation. Cracks were noticed near the northern portal of the tunnels which necessitated immediate stabilization. Observations during construction are presented.
Immediately north of “The Narrows” section of U. S. 189 is an approximate six-mile-long segment called the Upper Provo Canyon project. The project includes a one-mile section of roadway that traverses over some landslides, known as the Hoover Slides, which have been active for at least 60 years. The Hoover Slides are within a thrust fault known as the Deer Creek thrust. From the exploration program, geotechnical and geologic features were identified which permitted the development of probable chronological events of the Hoover Slides and postulated sliding mechanisms responsible for the movements.
