# Relationship history for MSHA mine 2200794

Current hierarchy: **Thomas G  Comer  Jr → Bulldog Sand and Gravel, Inc → AL-14**

- 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:** Thomas G  Comer  Jr → AL-14; 2003-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C M C LLC → AL-14; 2009-06-03 to 2010-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Ray  Duffy → AL-14; 2009-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ray  Duffy → C M C LLC; 2009-06-03 to 2010-09-07; source msha-controller-operator-history
- **operator_operates_mine:** Bulldog Sand and Gravel, Inc → AL-14; 2010-09-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas G  Comer  Jr → Bulldog Sand and Gravel, Inc; 2010-09-08 to current/open; source msha-controller-operator-history