# Relationship history for MSHA mine 1512639

Current hierarchy: **Dennis  Ratliff; Timmy  Ratliff → A & R Coal Corp → No 5 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Betty Coal Company Inc → No 5 Mine; 1980-12-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Robinson Clyde → No 5 Mine; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robinson Clyde → Betty Coal Company Inc; 1980-12-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Timmy  Ratliff et al → No 5 Mine; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & Mb Coal Company → No 5 Mine; 1981-11-30 to 1986-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Biliter Marvin Jr → No 5 Mine; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Biliter Marvin Jr → M & Mb Coal Company; 1981-11-30 to 1986-11-02; source msha-controller-operator-history
- **operator_operates_mine:** A & R Coal Corp → No 5 Mine; 1986-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timmy  Ratliff et al → A & R Coal Corp; 1986-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Ratliff et al → A & R Coal Corp; 1986-11-03 to current/open; source msha-controller-operator-history