Michael A . Twohig

Michael A. Twohig is a Subject Matter Expert in the field of Subsurface Utility Mapping (SUM). Michael has more than 36 years of industry experience across the US, Australia, India, and Europe with a focus on the integration of traditional utility locating procedures with land survey best practices. As head of SUM at DGT, Michael spearheads the firm’s subsurface utility locating, 3D utility mapping and subsurface utility damage prevention programs. Michael is currently developing Multi-Sensor Mobile Mapping platforms using the next generation of multi-channel, multi-frequency Ground Penetrating Radar (GPR) systems for the SUM and void detection industry. In the span of his career, Michael has authored more than 40 articles relating to utility mapping, underground damage prevention, and utility industry best practices, and he is a frequent speaker at international conferences such as the Common Ground Alliance CGA, SPAR, Hexagon and the international Lidar conference ILMF and most recently GEOBIM in Amsterdam. Michael has also presented SUM best practices at military, transportation, commercial and GITA conferences. One of Michael’s greatest achievements is the advancement and development and implementation of new 3D deliverables for geospatial projects, integrating LiDAR, utility locating systems, GPR, infrared, land surveying, and multi-sensor platforms to provide high quality, reliable and accurate data for CAD, GIS and BIM delivery format.

Phone: 617-275-0541
Email: mtwohig@dgtassociates.com


Today’s Best Practices for Multi-Channel Ground Penetrating Radar It didn’t take long after utilities were buried underground that humans had a need to discover where they put them – somewhat equivalent in today’s world of using your friend’s cell phone to call the one you misplaced. The art and science of locating and mapping the …


Ask the DP Pro – Michael Twohig

Q How has our Underground Mapping Documentation Practices Improved over Time? A by Michael A. Twohig TODAY’S MODERN utility locating technology and procedures have come a long way from the primitive tools our forefathers used in tunneling beneath the ground. Yet, in many ways, our current documentation practices have regressed. Lessons learned from pioneers in underground …

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Skybound: How The Future Of Underground Mapping Can Be Found In The Cloud

Land surveyors have been locating and mapping underground infrastructure to provide construction professionals and engineers with final plans and records that reflect an accurate representation of the natural and built environment. Our predecessors excavated around buried utilities, underground structures, and foundation elements to map the existing conditions. The results were plotted and depicted on plans and …

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Mobile Mapping

Safety for the Work, and the Workers Over the past three decades, Subsurface Utility Mapping (SUM) has gained momentum in the AEC industry as a superior practice for capturing the underground environment. Building on Subsurface Utility Engineering (SUE), SUM goes beyond locating underground utilities; mapping underground data in detailed delivery formats that owners and designers …

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Utility Locating And Mapping In Australia And The United States: Same But Different

As a private market provider of professional utility locating and mapping services on numerous continents, I have been very fortunate to collaborate with organisations all over the world. Being a utility surveyor in a global market I have had the pleasure to mentor and train personnel in the art and science of utility locating and …

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