Case Study—50% Labor Reduction, 30% Time Savings, and No Damages, No Delays, No Change Orders—No Kidding! Application of 3D Subsurface Utility Engineering per ASCE 38 Standard for Puget Sound Energy’s SR-510 Gas Pipeline Project

Surprising value is reaped for pipeline projects utilizing (1) advanced geophysical investigative tools and engineering tactics applied in accordance with standards and practices promoted by the American Society of Civil Engineers (ASCE) Utility Engineering and Survey Institute (UESI) and (2) emerging technologies for managing data and developing 3D models for visualizing and design. This case study covers the process used and demonstrates the remarkable benefits achieved through ASCE compliant utility data acquisition including advanced geophysical investigative methods, 3D CADD modeling and design, and conflict analytics with existing infrastructure (including abandoned, unknown facilities) coupled with a sensitivity analysis to assess and optimize alternative pipeline alignments in 3D. Benefits achieved included expedited permit approval with waivers; greatly enhanced bidding; expedited construction executed with half the scheduled work force and completed in 30% less time without change orders, damages, or delays.