# Relationship history for MSHA mine 4605651

Current hierarchy: **Brown Robert → J L Mullens Coal Company Inc → No 2 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Mullens Junior L → No 2 Mine; 1975-08-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J L Mullens Coal Company Inc → No 2 Mine; 1977-09-01 to 1978-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Mullens Junior L → J L Mullens Coal Company Inc; 1977-09-01 to 1978-05-21; source msha-controller-operator-history
- **operator_operates_mine:** J L Mullens Coal Company Inc → No 2 Mine; 1978-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brown Robert → No 2 Mine; 1978-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Robert → J L Mullens Coal Company Inc; 1978-05-22 to current/open; source msha-controller-operator-history