# Relationship history for MSHA mine 4605576

Current hierarchy: **Smith Leonard O → Glade Creek Coal Company Inc → No 1 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:** Costa Dominick → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big C Coal Corp → No 1 Mine; 1977-06-01 to 1984-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Charles M → No 1 Mine; 1977-06-01 to 1984-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Charles M → Big C Coal Corp; 1977-06-01 to 1984-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Coal Management Inc → No 1 Mine; 1984-08-04 to 1985-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Costa Dominick → Coal Management Inc; 1984-08-04 to 1985-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Glade Creek Coal Company Inc → No 1 Mine; 1985-05-30 to 1986-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Henry Dale  Shrewsbury → No 1 Mine; 1985-05-30 to 1986-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Henry Dale  Shrewsbury → Glade Creek Coal Company Inc; 1985-05-30 to 1986-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Glade Creek Coal Company Inc → No 1 Mine; 1986-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Leonard O → No 1 Mine; 1986-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Leonard O → Glade Creek Coal Company Inc; 1986-06-17 to current/open; source msha-controller-operator-history