Subsurface Utility Engineering - An engineering process obtaining reliable underground utility information.
PIARC Committee on Roads, Transportation and Regional Development (C4) does not directly examine the topics linked to road construction, but is interested in all the procedures, methods and experiments which help reduce costs and improve efficiency. In this framework, we have already presented an article on the use of Value Analysis in the area of roads. The article proposed today concerns a subject well-known To urban engineers, but less present in the concerns of interurban road designers; that of underground cables and ductwork.
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• A Process Named SUE
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| Reducing Utility Risks A partnership led by the Virginia Dept. of Rail and Public Transportation (DRPT) is planning a 23-mile extension of its Metrorail, from the Orange Line, near Falls Church, to Route 772 in Loudoun County, beyond Dulles Airport. The $4-billion dollar public private partnership. Known as Dulles Corridor Metrorail Project, is one of the most complex projects ever undertaken in the Northern Virginia area. The planned alignment will encounter nearly every utility that supports one of the largest commercial areas in the United States. To reduce the risk of conflicts with these utilities, prime contractor Dulles Transit Partners, LLC (DTP) turned to TBE Group to provide Subsurface Utility Engineering (SUE) and utility coordination services on the first phase of the project, which extends to Tyson's Corner and Reston. "This congested transit project corridor is already a developed urban area that presents a considerable utility coordination challenges," said Nicholas Zembillas, senior vice president. "There are multiple utilities that need to be verified and coordinated for relocation, new installation or removal. Incorporating utility coordination and SUE on this design-build project has successfully minimized unnecessary utility relocation and reduced the risk of costly utility conflicts." TBE found that in many instances the composite plans showed utilities more than 10ft away from their actual horizontal location. In several instances, utility owners had existing facilities that did not even appear on their record drawings and, thus, were not on the composite plans. Had the design proceeded based only on the as-built information, significant impacts with existing utilities would have occurred, causing costly design and construction delays. DTP has now completed phase 1 of the preliminary engineering. Final design is expected to begin in the fall of 2006, with construction scheduled for 2007. Credits Publication(s) |
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