# Relationship history for MSHA mine 4608094

Current hierarchy: **Childress James W → Bmc Mining Company → No 1 Surface**

- 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

- **operator_operates_mine:** Melissa Coals Inc → No 1 Surface; 1991-10-01 to 1993-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Phillip H  Edwards → No 1 Surface; 1991-10-01 to 1993-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Phillip H  Edwards → Melissa Coals Inc; 1991-10-01 to 1993-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Melissa Coals Inc → No 1 Surface; 1993-02-08 to 1995-10-13; source msha-controller-operator-history
- **controller_controls_mine:** Looney Everett Basil → No 1 Surface; 1993-02-08 to 1995-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Looney Everett Basil → Melissa Coals Inc; 1993-02-08 to 1995-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Bmc Mining Company → No 1 Surface; 1995-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Childress James W → No 1 Surface; 1995-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childress James W → Bmc Mining Company; 1995-10-14 to current/open; source msha-controller-operator-history