# Relationship history for MSHA mine 4604239

Current hierarchy: **Taylor Everett → M R K T Coals Inc → #5 Surface**

- 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:** T W Oil Inc → #5 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Imperial Coal & Construction Company Inc → #5 Surface; 1974-01-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_operator:** T W Oil Inc → Imperial Coal & Construction Company Inc; 1974-01-01 to 1980-04-30; source msha-controller-operator-history
- **operator_operates_mine:** M R K T Coals Inc → #5 Surface; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Everett → #5 Surface; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Everett → M R K T Coals Inc; 1980-05-01 to current/open; source msha-controller-operator-history