# Relationship history for MSHA mine 4404076

Current hierarchy: **Bill G  Humphreys → Flat Gap Mining Inc → No 1 Preparation Plant**

- 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:** British Petroleum Company PLC → No 1 Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Old Ben Coal Company → No 1 Preparation Plant; 1975-01-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** British Petroleum Company PLC → Old Ben Coal Company; 1975-01-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Hurshel  Bowers et al → No 1 Preparation Plant; 1977-09-19 to 1981-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Flat Gap Mining Company Inc → No 1 Preparation Plant; 1977-10-01 to 1981-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Hurshel  Bowers et al → Flat Gap Mining Company Inc; 1977-10-01 to 1981-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Flat Gap Mining Inc → No 1 Preparation Plant; 1981-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill G  Humphreys → No 1 Preparation Plant; 1981-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill G  Humphreys → Flat Gap Mining Inc; 1981-11-03 to current/open; source msha-controller-operator-history