# Relationship history for MSHA mine 4405626

Current hierarchy: **South Atlantic Coal Company Inc → Race Fork Coal Corp → Race Fork Strip #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** South Atlantic Coal Company Inc → Race Fork Strip #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Crown Central Petroleum Corp et al → Race Fork Strip #1; 1977-04-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Race Fork Strip #1; 1981-04-01 to 1982-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Crown Central Petroleum Corp et al → Race Fork Coal Corp; 1981-04-01 to 1982-02-28; source msha-controller-operator-history
- **controller_controls_operator:** JNO McCall Coal Company et al → Race Fork Coal Corp; 1981-04-01 to 1982-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Race Fork Strip #1; 1982-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** South Atlantic Coal Company Inc → Race Fork Coal Corp; 1982-03-01 to current/open; source msha-controller-operator-history