PLAN B REPORT TITLE: DEVELOPMENT OF GUIDELINES AND DECISION METHODOLGY FOR CULVERT REHABILITATION
FOREWORD: Drainage facilities, such as culverts, decay due to the processes of abrasion, corrosion, and erosion, shortening the anticipated service life of the facility. Many culverts have deteriorated and need repair or replacement. Until recently, most repair or replacement of culverts required open-cutting (trench digging). State Departments of Transportation, the Federal Highway Administration (FHWA), and others have turned toward trenchless technology as a cost effective solution to culvert rehabilitation. Trenchless technology can be utilized with a wide range of methods, materials, and equipment for rehabilitation or replacement. Rehabilitation of existing culverts through lining techniques has gained popularity in the United States. To date, several trenchless lining techniques have been used for the rehabilitation of existing culverts. However, choosing an optimum lining technique can be complicated considering the vast amount of organizations specializing in the manufacturing and installation of culvert liners, as well as the various materials, applications, and limitations associated with each lining technique. Colorado State University was contracted to establish guidelines and specifications for the use of culvert liners. A user-friendly MicrosoftÒ Excel-based Multi-criteria Decision Analysis (MCDA) tool that allowed the user to customize the decision aid model was developed. This document details this effort and provides guidance to both the Design and Construction Branches of the FHWA and to State DOTs.
GRADUATION DATE: Spring 2004