# Relationship history for MSHA mine 4406229

Current hierarchy: **Ramey C A → B D & R Mining Inc → 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:** Ramey C A → Mine No 2; 1985-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B D & R Mining Inc → Mine No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ramey C A → B D & R Mining Inc; 1985-07-01 to current/open; source msha-controller-operator-history