Chapter 1: The Canary
Key concepts: The Canary
1. The Canary
The Unlikely Nominee
- Sammies awards celebrate extraordinary federal employees
- Nominee Christopher Mark was a former coal miner
- He grew up in Princeton, son of a professor
- He rejected elitism and chose factory work
From Princeton to Coal Mine
- Father Robert Mark studied Gothic cathedral structures
- Chris developed a fine nose for elitism
- Vietnam War pushed him to reject privilege
- He worked in oil refinery, UPS, auto plant, then coal mine
The Deadly Problem of Roof Falls
- Half of 50,000 mining deaths from falling roofs
- Pillar design formulas were inconsistent
- Wilberg Mine disaster killed 27 due to bad pillars
- Chris saw the cause immediately
Building a Science from Scratch
- PhD thesis was first systematic collapse prevention
- Joined Bureau of Mines as Principal Roof Control Specialist
- Used statistical methods to find patterns
- Resurrected ball-peen hammer rock testing
The Plate Tectonics Revelation
- Horizontal stress 2-3 times greater than vertical
- Contradicted every textbook on mining
- Matched stress directions to tectonic map
- Mines across plate grain collapsed more often
The Rating System and Its Impact
- Created roof rating system by 1994
- Reduced to checklist and software
- Industry adopted it voluntarily
- Like turning on the lights for mining safety
The Tragic Lesson of Crandall Canyon
- Murray Energy ignored Chris's formula in 2007
- Six miners trapped, six rescuers died
- Bodies were never recovered
- Mandatory oversight followed; zero roof fall deaths by 2016
