Abstract
Two regional Subsurface Utility Engineering (SUE) projects performed for the Oregon Department of Transportation and the Washington State Department of Transportation demonstrate how SUE can effectively be used to locate and map underground utility facilities. The field investigation results led to the development of a two-dimensional map and/or three-dimensional model that facilitated roadway and stormwater facility designs. The model also served as a tool that easily identified utility conflicts and problem areas to be addressed either through redesign or relocation. This information led to effective utility coordination that minimized conflicts, facilitated required relocation design, and increased cooperation and collaboration between utilities and public agencies. The process saved time, money and roadway construction contractor claims. Documentation of varying SUE quality levels per CI/ASCE 38-02 Standard Guideline for the Collection and Depiction of Existing Subsurface Utility Data is also discussed.
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