# Relationship history for MSHA mine 1510171

Current hierarchy: **Hogg Jim → Whitesburg Coal Inc → No 1 Processing 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:** Paul J  Sturgill → No 1 Processing Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sassafras Coal Company Inc → No 1 Processing Plant; 1977-01-01 to 1977-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Kelly Henry → No 1 Processing Plant; 1977-01-01 to 1977-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Kelly Henry → Sassafras Coal Company Inc; 1977-01-01 to 1977-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Howell Corporation → No 1 Processing Plant; 1977-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lake Coal Company Inc → No 1 Processing Plant; 1977-05-17 to 1978-11-20; source msha-controller-operator-history
- **controller_controls_operator:** Howell Corporation → Lake Coal Company Inc; 1977-05-17 to 1978-11-20; source msha-controller-operator-history
- **operator_operates_mine:** Golden Oak Mining Company Inc → No 1 Processing Plant; 1978-11-21 to 1979-12-13; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Golden Oak Mining Company Inc; 1978-11-21 to 1979-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Whitesburg Coal Inc → No 1 Processing Plant; 1979-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hogg Jim → No 1 Processing Plant; 1979-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hogg Jim → Whitesburg Coal Inc; 1979-12-14 to current/open; source msha-controller-operator-history