# Relationship history for MSHA mine 4606692

Current hierarchy: **Craddock Robert L & Robert P → Craddock & Son Coal Company Inc → Surface Mine No 2**

- 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:** Craddock Robert L & Robert P → Surface Mine No 2; 1974-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thomas Bailes Coal Company Inc → Surface Mine No 2; 1983-09-01 to 1986-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Bailes Thomas → Surface Mine No 2; 1983-09-01 to 1992-11-18; source msha-controller-operator-history
- **controller_controls_operator:** Bailes Thomas → Thomas Bailes Coal Company Inc; 1983-09-01 to 1986-09-04; source msha-controller-operator-history
- **operator_operates_mine:** Craddock & Son Coal Company Inc → Surface Mine No 2; 1986-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craddock Robert L & Robert P → Craddock & Son Coal Company Inc; 1986-09-05 to current/open; source msha-controller-operator-history