New Risk-Consequence Rockfall Hazard Rating System for Missouri Highways Using Digital Image Analysis

Abstract

Research Article| March 01, 2005 New Risk–Consequence Rockfall Hazard Rating System for Missouri Highways Using Digital Image Analysis NORBERT H. MAERZ; NORBERT H. MAERZ 1University of Missouri–Rolla, 1006 Kingshighway, Rolla, MO 65409 Search for other works by this author on: GSW Google Scholar AHMED YOUSSEF; AHMED YOUSSEF 1University of Missouri–Rolla, 1006 Kingshighway, Rolla, MO 65409 Search for other works by this author on: GSW Google Scholar THOMAS W. FENNESSEY THOMAS W. FENNESSEY 2Missouri Department of Transportation, 1617 Missouri Boulevard, Jefferson City, MO 65109 Search for other works by this author on: GSW Google Scholar Author and Article Information NORBERT H. MAERZ 1University of Missouri–Rolla, 1006 Kingshighway, Rolla, MO 65409 AHMED YOUSSEF 1University of Missouri–Rolla, 1006 Kingshighway, Rolla, MO 65409 THOMAS W. FENNESSEY 2Missouri Department of Transportation, 1617 Missouri Boulevard, Jefferson City, MO 65109 Publisher: Association of Environmental & Engineering Geologists First Online: 02 Mar 2017 Online ISSN: 1558-9161 Print ISSN: 1078-7275 © 2005 Association of Engineering Geologists Environmental & Engineering Geoscience (2005) 11 (3): 229–249. https://doi.org/10.2113/11.3.229 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation NORBERT H. MAERZ, AHMED YOUSSEF, THOMAS W. FENNESSEY; New Risk–Consequence Rockfall Hazard Rating System for Missouri Highways Using Digital Image Analysis. Environmental & Engineering Geoscience 2005;; 11 (3): 229–249. doi: https://doi.org/10.2113/11.3.229 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract The Missouri Rockfall Hazard Rating System (MORFH RS) is a new scheme for rating rockfall hazards along the roads of the Missouri State highway system. Existing rating systems used in other jurisdictions focus on the risk of failure and ignore the consequence of failure, or they lump the ratings for risk and consequence together. Missouri highway rock cuts tend to have low heights but are typically highly weathered, with special problems from karst and paleokarst. In MORFH RS, risk and consequence factors are given equal weight but isolated from each other. MORFH RS utilizes two phases: 1) identification of the most potentially problematic rock cuts using mobile digital video logging; 2) characterization and prioritization of remediation for the potentially problematic rock cuts identified in phase 1, using MORFH RS. In phase 2 four types of parameters are evaluated: 1) parameters that can be measured on computer scaled video images; 2) parameters which are descriptive, and need field evaluation; 3) parameters which are obtained from MODOT records; 4) conditional parameters which are evaluated under specific conditions. Only those parameters were selected that were deemed meaningful and/or relatively easy to measure or estimate. Parameters were assigned to either a risk or consequence category or both. MORFH RS has been tested on sections of Missouri highways. About 300 rock cuts were evaluated and used to prepare, modify, test, and verify the system. Sensitivity analysis of the system was done by quantifying potential errors in the video measurements and by a rating comparison of 12 MODOT and University of Missouri-Rolla (UMR) personnel on 10 rock cuts along Highway 63. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.