# Relationship history for MSHA mine 1514480

Current hierarchy: **Coleman Ken → Big C Coal Company Inc → No 1**

- 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:** Thomas B  Ratliff → No 1; 1978-09-01 to 2019-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Skeens Stanley → No 1; 1982-03-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Landmark Mining Company Inc → No 1; 1984-03-01 to 1984-04-24; source msha-controller-operator-history
- **controller_controls_operator:** Thomas B  Ratliff → Landmark Mining Company Inc; 1984-03-01 to 1984-04-24; source msha-controller-operator-history
- **operator_operates_mine:** Cadillac Coal Company Inc → No 1; 1984-04-25 to 1984-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Skeens Stanley → Cadillac Coal Company Inc; 1984-04-25 to 1984-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Dana Mining Corp → No 1; 1984-10-11 to 1984-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Frank → No 1; 1984-10-11 to 1984-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Frank → Dana Mining Corp; 1984-10-11 to 1984-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Kendrick Coal Corp → No 1; 1984-12-11 to 1988-03-15; source msha-controller-operator-history
- **controller_controls_mine:** Kendrick Claude H Sr → No 1; 1984-12-11 to 1988-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Kendrick Claude H Sr → Kendrick Coal Corp; 1984-12-11 to 1988-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Big C Coal Company Inc → No 1; 1988-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Ken → No 1; 1988-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Ken → Big C Coal Company Inc; 1988-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Ratliff → No 1; 2019-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Ratliff → Landmark Mining Company Inc; 2019-06-20 to 1984-04-24; source msha-controller-operator-history