# Relationship history for MSHA mine 4603503

Current hierarchy: **Spencer Roy → Logan Lincoln Coal Company Inc → Daisy 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:** Mullins Coal Company Inc → Daisy Mine; 1950-01-01 to 1975-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Ira → Daisy Mine; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Ira → Mullins Coal Company Inc; 1950-01-01 to 1975-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Sammons Arthur → Daisy Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H M N & S Coal Company Inc → Daisy Mine; 1975-02-03 to 1975-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Sammons Arthur → H M N & S Coal Company Inc; 1975-02-03 to 1975-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Mullins Coal Company Inc → Daisy Mine; 1975-10-30 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Ira → Mullins Coal Company Inc; 1975-10-30 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Mineral Resources International Ltd → Daisy Mine; 1978-08-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mullins Coal Company Inc → Daisy Mine; 1978-09-16 to 1981-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Mineral Resources International Ltd → Mullins Coal Company Inc; 1978-09-16 to 1981-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Imperial-Pacific Investments Inc → Daisy Mine; 1981-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winchester Coals Inc → Daisy Mine; 1981-10-06 to 1982-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Imperial-Pacific Investments Inc → Winchester Coals Inc; 1981-10-06 to 1982-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Logan Lincoln Coal Company Inc → Daisy Mine; 1982-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Spencer Roy → Daisy Mine; 1982-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Spencer Roy → Logan Lincoln Coal Company Inc; 1982-07-13 to current/open; source msha-controller-operator-history