# Relationship history for MSHA mine 1512485

Current hierarchy: **Franks Billy Ray → Briar Coal Company Inc → No 1**

- 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:** Paul J  Sturgill → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Golden Oak Mining Company Inc → No 1; 1980-08-01 to 1980-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Golden Oak Mining Company Inc; 1980-08-01 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Golden Oak Mining Company Inc → No 1; 1981-01-01 to 1981-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Reading & Bates Corp → No 1; 1981-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reading & Bates Corp → Golden Oak Mining Company Inc; 1981-01-01 to 1981-02-11; source msha-controller-operator-history
- **operator_operates_mine:** Briar Coal Company Inc → No 1; 1981-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Franks Billy Ray → No 1; 1981-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Franks Billy Ray → Briar Coal Company Inc; 1981-02-12 to current/open; source msha-controller-operator-history