# Relationship history for MSHA mine 0500305

Current hierarchy: **Asher James D → Coal Operating Company → Lincoln 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Brennan George → Lincoln Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clayton Coal Company → Lincoln Mine; 1950-01-01 to 1974-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Clendenin G Herbert → Lincoln Mine; 1950-01-01 to 1974-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Clendenin G Herbert → Clayton Coal Company; 1950-01-01 to 1974-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Adolph Coors Company → Lincoln Mine; 1974-07-16 to 1976-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Coors Adolph Company → Lincoln Mine; 1974-07-16 to 1976-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Coors Adolph Company → Adolph Coors Company; 1974-07-16 to 1976-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Imperial Coal Company → Lincoln Mine; 1976-03-26 to 1978-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Brennan George → Imperial Coal Company; 1976-03-26 to 1978-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Coal Operating Company → Lincoln Mine; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asher James D → Lincoln Mine; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asher James D → Coal Operating Company; 1978-04-01 to current/open; source msha-controller-operator-history