A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Management of Unstable Slopes along Washington State Highways - Past, Present, and Future
In 1993, the Washington State Department of Transportation (WSDOT) implemented the Unstable Slope Management System (USMS) to address the roughly 3200 known unstable slope hazards adjacent to WSDOT's 7000-mile-long highway system. Since inception of this preservation program, about 244 slopes have been fully mitigated either through a proactive, benefit-cost programming process, emergent needs, or as part of other highway improvement projects. Excluding slopes mitigated as part of other highway improvement projects, a total investment cost of approximately $180 million has been spent through 2011. In 2007, WSDOT instituted a risk-reduction scaling program to provide partial mitigation for rockfall-prone slopes that could not meet programming criteria for full mitigation. As many of the highest hazard slopes along the most critical highway corridors have now been mitigated, and the initial programming criteria has been revised to broaden the range of slopes eligible for programming. Projections for reduced budgets may shift programming priorities to less costly activities, such as partial rather than full mitigation, more use of monitoring as a basis for programming critical emergent needs, and performance evaluation of past mitigation efforts to guide future programming strategies.
Management of Unstable Slopes along Washington State Highways - Past, Present, and Future
In 1993, the Washington State Department of Transportation (WSDOT) implemented the Unstable Slope Management System (USMS) to address the roughly 3200 known unstable slope hazards adjacent to WSDOT's 7000-mile-long highway system. Since inception of this preservation program, about 244 slopes have been fully mitigated either through a proactive, benefit-cost programming process, emergent needs, or as part of other highway improvement projects. Excluding slopes mitigated as part of other highway improvement projects, a total investment cost of approximately $180 million has been spent through 2011. In 2007, WSDOT instituted a risk-reduction scaling program to provide partial mitigation for rockfall-prone slopes that could not meet programming criteria for full mitigation. As many of the highest hazard slopes along the most critical highway corridors have now been mitigated, and the initial programming criteria has been revised to broaden the range of slopes eligible for programming. Projections for reduced budgets may shift programming priorities to less costly activities, such as partial rather than full mitigation, more use of monitoring as a basis for programming critical emergent needs, and performance evaluation of past mitigation efforts to guide future programming strategies.
Management of Unstable Slopes along Washington State Highways - Past, Present, and Future
Badger, Thomas C. (author) / Fish, Marc (author) / Trople, Tracy (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 1643-1650
2013-02-25
Conference paper
Electronic Resource
English
Management of Unstable Slopes along Washington State Highways - Past, Present, and Future
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