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Project Risk Assessment of Dallas Area Rapid Transit (DART) NW/SE Light Rail

Dallas, Texas, USA


Client Federal Transit Administration/Shaw Stone and Webster
Industries Transportation
Services Engineering and Operational Risk Assessment

Assignment
Dallas Area Rapid Transit (DART) plans to build the Northwest/Southeast Light Rail Transit (NW/SE LRT) extension, which is a new 20.9-mile double-track light-rail transit line in Dallas. It includes the Northwest Corridor, the Southeast Corridor, associated station, park-and-ride lots and system elements, a new rail operating facility, and the purchase of light rail vehicles. Golder Associates completed a cost and schedule risk assessment on behalf of the Federal Transit Administration (FTA) as a subconsultant to Shaw Stone and Webster.

Our Role
The objectives of the risk assessment were to: 1) review and validate the base cost and schedule estimates (led by Shaw), where the base is the planned project without any significant problems; 2) identify a comprehensive and non-overlapping set of cost and schedule risks and opportunities, as well as cost-effective risk-management actions to better manage those risks; and 3) quantify uncertainty in the ultimate project cost and schedule before risk mitigation and including planned risk mitigation. Potential risk-management activities included avoidance, reduction/mitigation, transference, and acceptance (if no viable options were identified to improve a particular risk). Two of the major uncertainties facing the project were uncertainty in the financing cost and construction-cost inflation rates. Therefore, in addition to the traditional risk assessment results, we also evaluated the sensitivity of results to different assumptions/conditions in these key variables to help DART make more informed project decisions.

Associated Services

Ground Engineering Services
From initial investigations through to design, construction, operation and closure, Golder provides integrated geotechnical services to...

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