Lewis explores the life and career of Christopher Mark, a mining engineer whose work dramatically improved safety in coal mines. The essay interweaves Mark’s personal journey with broader themes about government service, worker safety, and societal attitudes toward civil servants who solve critical problems yet remain largely invisible.

Lewis begins by introducing the Partnership for Public Service, an organization founded in 2001 by Samuel Heyman to recognize extraordinary achievements by federal employees. The organization created the “Sammies” awards to highlight remarkable accomplishments within government agencies that typically go unnoticed. Lewis notes that attracting talented individuals to government work is challenging because civil servants face public criticism when they fail but receive little recognition when they succeed.

The Partnership for Public Service initially struggled to receive nominations until its director, Max Stier, personally contacted cabinet secretaries to request submissions. Early recipients included Federal Bureau of Investigation (FBI) agents who solved a 1963 Birmingham church bombing case, a Centers for Disease Control (CDC) doctor who helped eradicate polio in India, and an Energy Department official who transformed a nuclear waste site into a park decades ahead of schedule and billions under budget.

Lewis became intrigued by a nomination for Christopher Mark, described as a “former coal miner” who developed industry standards that led to the first year with zero roof fall fatalities in US coal mining history. Upon contacting Mark, Lewis discovered a fascinating life story that defied his expectations.

Mark grew up in Princeton, New Jersey. His father, Robert Mark, was a civil engineering professor who gained recognition for using photo-elastic modeling techniques to analyze Gothic cathedral structures. Rather than following his father’s academic path, Christopher rebelled during the Vietnam War era, becoming politically radicalized and eventually dropping out of college to work in factories and coal mines, hoping to organize workers.

In West Virginia, Mark experienced the dangerous reality of coal mining firsthand while his revolutionary ideals began to fade. Around this time, his mother died by suicide. After a year in the mines, Mark enrolled at Penn State to study mining engineering, where he developed an interest in mine safety, particularly the problem of roof collapses, which had killed approximately 50,000 miners.

At Penn State, Mark identified significant inconsistencies in the formulas used to design mine roof support pillars. After completing his studies, he joined the federal Bureau of Mines where he developed statistical methods to analyze mine safety data, creating what he called a “stability factor” to predict when coal mine roofs might collapse.

Mark expanded his research to account for varying geological conditions across different mining regions and discovered the significant role of horizontal stress caused by plate tectonics in roof collapses. By 1994, he had created a comprehensive rating system for coal mine roofs that engineers could use to evaluate safety requirements.

Lewis emphasizes that Mark’s breakthrough came from approaching the problem statistically rather than using traditional engineering methods. Mark also discovered that during the first 20 years after roof bolts were introduced to mining in the 1940s, they didn’t reduce fatality rates because companies installed only enough to maintain existing risk levels while increasing production efficiency.

Mark’s work culminated in 2016, the first year in history without any roof fall fatalities in US coal mines. Lewis notes that this achievement resulted from both technological improvements and regulatory enforcement. The Crandall Canyon mine disaster in 2007, where six miners died when a mining company ignored Mark’s design formula, demonstrated the continuing importance of government oversight.

Despite his significant contributions, Mark remained largely unknown outside his field. Lewis draws parallels between Christopher Mark and his father, Robert: Both studied stress in stone structures and solved problems through scientific measurement, though one worked on celebrated Gothic cathedrals while the other improved safety in overlooked coal mines. Lewis concludes by describing a rare collaboration between Christopher and Robert Mark when they worked together to assess structural issues at Washington National Cathedral—a symbolic bridge between their seemingly different yet fundamentally similar life’s work.