# Relationship history for MSHA mine 4406799

Current hierarchy: **Mullins Carl & Sylvia → Marietta Coal Company Inc → Mine No 2**

- 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:** MAPCO Inc → Mine No 2; 1989-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Carl & Sylvia → Mine No 2; 1994-11-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Race Fork Coal Corp → Mine No 2; 1995-06-01 to 1995-08-06; source msha-controller-operator-history
- **controller_controls_operator:** MAPCO Inc → Race Fork Coal Corp; 1995-06-01 to 1995-08-06; source msha-controller-operator-history
- **operator_operates_mine:** Marietta Coal Company Inc → Mine No 2; 1995-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Carl & Sylvia → Marietta Coal Company Inc; 1995-08-07 to current/open; source msha-controller-operator-history