# Relationship history for MSHA mine 1515740

Current hierarchy: **Hobert  Newman → B M C Inc → No 5-A**

- 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:** Fife Jack D → No 5-A; 1985-05-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B M C Inc → No 5-A; 1986-09-01 to 1987-08-19; source msha-controller-operator-history
- **controller_controls_mine:** Hobert  Newman → No 5-A; 1986-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobert  Newman → B M C Inc; 1986-09-01 to 1987-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Fife Coal Company Inc → No 5-A; 1987-08-20 to 1988-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Fife Jack D → Fife Coal Company Inc; 1987-08-20 to 1988-02-16; source msha-controller-operator-history
- **operator_operates_mine:** B M C Inc → No 5-A; 1988-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobert  Newman → B M C Inc; 1988-02-17 to current/open; source msha-controller-operator-history