# Relationship history for MSHA mine 1516014

Current hierarchy: **Mullins Clyde A-Carlos Maggard → Maggard & Maggard Coal Company Inc → Mine #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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mullins Clyde A-Carlos Maggard Et Al → Mine #2; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nova Mining Inc → Mine #2; 1987-05-01 to 1987-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Smith George W & Robert G → Mine #2; 1987-05-01 to 1987-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Smith George W & Robert G → Nova Mining Inc; 1987-05-01 to 1987-10-27; source msha-controller-operator-history
- **operator_operates_mine:** Beck-Tawn Coal Company Inc → Mine #2; 1987-10-28 to 1988-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jimmie → Mine #2; 1987-10-28 to 1990-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jimmie → Beck-Tawn Coal Company Inc; 1987-10-28 to 1988-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Maggard & Maggard Coal Company Inc → Mine #2; 1988-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Clyde A-Carlos Maggard Et Al → Maggard & Maggard Coal Company Inc; 1988-01-14 to current/open; source msha-controller-operator-history