# Relationship history for MSHA mine 4607542

Current hierarchy: **Mc Million Virgil & Jerry Hatley → Shaker Run Coal Company Inc → Laurel Creek Mine 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mc Call-John Coal Company Inc → Laurel Creek Mine No 1; 1982-11-22 to 1988-12-08; source msha-controller-operator-history
- **controller_controls_mine:** Taylor Jessie D → Laurel Creek Mine No 1; 1987-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Million Virgil & Jerry Hatley → Laurel Creek Mine No 1; 1987-09-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Spring Ridge Coal Company → Laurel Creek Mine No 1; 1988-07-01 to 1988-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Call-John Coal Company Inc → Spring Ridge Coal Company; 1988-07-01 to 1988-07-31; source msha-controller-operator-history
- **operator_operates_mine:** P B T Coal Company Inc → Laurel Creek Mine No 1; 1988-08-01 to 1988-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Taylor Jessie D → P B T Coal Company Inc; 1988-08-01 to 1988-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Shaker Run Coal Company Inc → Laurel Creek Mine No 1; 1988-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Million Virgil & Jerry Hatley → Shaker Run Coal Company Inc; 1988-08-16 to current/open; source msha-controller-operator-history