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Landslide hazard rating matrix and database: vol 1 of 2

16. Abstract The Office of Geotechnical Engineering (OGE) of the Ohio Department of Transportation (ODOT) recognizes the need to develop a strategy to provide timely preventive maintenance to avoid onset of large or catastrophic slope failures. Furthermore, with limited financial resources, the OGE is forced to make rational decisions on the priority of various landslide (slope failure) maintenance and remediation needs. To address these issues, this research project was undertaken with the following objectives: (a) Develop a field validated landslide geological hazard rating matrix, (b) Develop field reconnaissance forms in paper format and electronic format (window plus ArcPad), (c) Develop and deploy a web enabled, GIS based landslide database, and (d) Develop a user's manual and training materials for the landslide geological hazard database. Based on synthesis of literature review of existing practices, ODOT in-house expert opinions, and knowledge of prevalent Ohio geological formations in landslide prone areas, the principal investigator developed the ODOT specific landslide hazard rating system, together with the field site reconnaissance form. A pilot database containing 39 landslide sites was compiled and statistically analyzed to ascertain the reasonableness of the hazard rating outcome. A web accessible landslide database in a GIS platform was developed, pilot tested, and deployed. In addition, a user's manual was developed to assist training of the future users of the system. The benefits from full implementation of the landslide database and landslide hazard rating matrix include: (a) elimination of excessive paper work, (b) near real-time monitoring and data management, (c) centralized information, (d) uniform data collection and reporting, (e) enhanced data sharing. Furthermore, the Ohio Department of Transportation can reap the benefits of cost saving due to early stage detection of landslide and taking pro-active remediation measures. Disclaimer Statement: The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Ohio Department of Transportation or the Federal Highway Administration. This report does not constitute a standard, specification or regulation.