Alexander McKenzie-Johnson is a Principal Engineering Geologist based in Texas with more than 17 years of professional experience focused on geohazard assessment and management for oil and gas clients.
Prior to Geosyntec, Alexander was the Kinder Morgan geohazard lead for the Natural Gas Pipeline Geohazard Management Program, overseeing a 70,000-mile-long network of natural gas pipelines across the United States. In his role he created and managed an industry-leading integrated approach to geohazard management that combined newer technologies like LiDAR, inertial measurement unit (IMU) ILI technology, and GIS databases with traditional geotechnical and geoscience techniques. In less than four years, Kinder Morgan's entire natural gas pipeline system was evaluated for landslides using this approach. The results of this assessment were used to implement proactive mitigation measures at several locations, such as strain relief excavations and soil nail stabilization. At many more locations, ongoing monitoring was implemented, ranging from repeat LiDAR and IMU surveys to remotely monitored strain gauges and geodetic survey points.
Alexander was also the team lead, contributor, or primary reviewer to several industry documents concerned with the management of geohazards including a recently completed Joint Industry Project (JIP) on management of ground movement hazards, the recently released Pipeline Research Council International (PRCI) design guidelines for construction of pipelines in areas subject to geohazards, and an Interstate Natural Gas Association of America (INGAA) report on the mitigation of land movement in steep and rugged terrain for pipeline projects.
Prior to Kinder Morgan, Alexander worked as a consulting engineering geologist and project manager specializing in geotechnical characterization and geologic hazards assessments for natural gas pipelines and other linear projects for a variety of clients across North America. These assessments totaled over 80,000 miles, and included clients such as TransCanada, Enterprise, Tallgrass, and Williams. He has also conducted numerous geotechnical investigations for oil and gas, transportation, and land development projects including Exxon's Point Thomson project and the Juneau Access Road project in Alaska, as well as numerous local landslide development and highway projects in the state of Washington. Alexander's experience has also included geotechnical investigations for horizontal directional drill (HDD) methods and preparing reports and documentation as part of the National Environmental Policy Act (NEPA) environmental permitting process.