# Relationship history for MSHA mine 4606066

Current hierarchy: **Redden Steve W → Maple Leaf Coal Company Inc → No 54 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** L & K Miller Coal Inc → No 54 Mine; 1979-10-01 to 1980-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Miller Louis T & Kevin → No 54 Mine; 1979-10-01 to 1981-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Miller Louis T & Kevin → L & K Miller Coal Inc; 1979-10-01 to 1980-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Altizer Joseph W & Melvin C Nottingham → No 54 Mine; 1979-10-22 to 1981-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Federated Mining Company Inc → No 54 Mine; 1980-09-23 to 1981-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Altizer Joseph W & Melvin C Nottingham → Federated Mining Company Inc; 1980-09-23 to 1981-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Maple Leaf Coal Company Inc → No 54 Mine; 1981-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Redden Steve W → No 54 Mine; 1981-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Redden Steve W → Maple Leaf Coal Company Inc; 1981-06-16 to current/open; source msha-controller-operator-history