Unstable Slope Management for Oregon Highways: Using Cost-Based Risk Assessment in Conjunction with...
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![Page 1: Unstable Slope Management for Oregon Highways: Using Cost-Based Risk Assessment in Conjunction with Site Characteristics to Manage Landslide and Rockfall.](https://reader035.fdocuments.us/reader035/viewer/2022062305/56649e055503460f94af1f14/html5/thumbnails/1.jpg)
Unstable Slope Management for Oregon Highways: Using Cost-Based Risk Assessment in Conjunction with Site Characteristics to Manage Landslide and Rockfall Effects on the Transportation System
Curran Mohney, C.E.G.Engineering Geology Program LeaderOregon Department of Transportation
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Current Funding VS Repair Cost of the 500 Highest-Ranked Sites
$0
$500,000,000
$1,000,000,000
$1,500,000,000
$2,000,000,000
$2,500,000,000
$3,000,000,000
$3,500,000,000
6/30/1998 6/30/2003 6/29/2008 6/29/2013 6/30/2018 6/30/2023 6/29/2028 6/29/2033 6/30/2038 6/30/2043 6/29/2048
Current Funding
Outstanding Repair Cost
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Program Goals:
• Locate and Rank all Unstable Slopes affecting the State’s Highways
• Prioritize and Select Projects
• Allocate Funds
• Provide Information to Policy and Decision-Makers
• Integrate Data and Analyses with Internal Disciplines and other Agencies
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Program Criteria:Program Criteria:
● Manage All Unstable Slopes Uniformly
● Manage Risk and Liability Uniformly
● Scale Higher-Order Analyses Relative to Site Priority
● Utilize An Impact-Based System
● Rank and Prioritize Landslides and Rockfalls in Accordance with the Federal Highway Administration’s Asset Management Concept
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Asset Management:Asset Management:• http://www.fhwa.dot.gov/infrastructure/asstmgmt/ind
ex.htm
• Decision-Making Methodology
• Draws from Business and Economics
• Supplements Scientific and Engineering Analyses
• Supports Decision-Making– Evaluate Trade-Offs– Conduct “What-If” Analyses– Make Sound “Investment” Decisions
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Unstable Slope Rating System:Unstable Slope Rating System:
Hazard ScoreX
Maintenance Benefit-Cost FactorX
Highway Classification Factor=
Final STIP Score
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Unstable Slope Data Collection Unstable Slope Data Collection Procedures:Procedures:
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Unstable Slope Unstable Slope ManagementManagement
Locate, Rank, Prioritize, and Select Sites for Repair
Perform Analyses: Cost-Benefit, Life Cycle Cost, etc.
Provide Information to Regions, Districts, Other Agencies, Public, etc.
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Unstable Slope Risk ManagementUnstable Slope Risk Management
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Questions ?Questions ?