# Relationship history for MSHA mine 1517343

Current hierarchy: **Dennis  Ratliff; Timmy  Ratliff → A & R Coal Corp → No 7**

- 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:** Dennis  Ratliff et al → No 7; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & R Coal Corp → No 7; 1993-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Ratliff et al → A & R Coal Corp; 1993-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timmy  Ratliff et al → A & R Coal Corp; 1993-01-01 to current/open; source msha-controller-operator-history