# Relationship history for MSHA mine 1513898

Current hierarchy: **Thornberry Rennie - Earl → Kentucky Gem Coal Company Inc → Glencoe Miners Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Thornberry Rennie - Earl Et Al → Glencoe Miners Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky Gem Coal Company Inc → Glencoe Miners Inc; 1983-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thornberry Rennie - Earl Et Al → Kentucky Gem Coal Company Inc; 1983-01-01 to current/open; source msha-controller-operator-history