# Relationship history for MSHA mine 4603161

Current hierarchy: **Goodwin Barry K → Mountain Carbon Inc → Summerlee Tipple**

- 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

- **operator_operates_mine:** New River Company → Summerlee Tipple; 1950-01-01 to 1981-01-12; source msha-controller-operator-history
- **controller_controls_mine:** CSX Corp → Summerlee Tipple; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSX Corp → New River Company; 1950-01-01 to 1981-01-12; source msha-controller-operator-history
- **controller_controls_mine:** Robert R  Bowling → Summerlee Tipple; 1980-07-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Summerlee Coal Processing Inc → Summerlee Tipple; 1981-01-13 to 1982-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Hunnicutt Joseph W Iii → Summerlee Tipple; 1981-01-13 to 1982-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Hunnicutt Joseph W Iii → Summerlee Coal Processing Inc; 1981-01-13 to 1982-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Plateau Coal Sales Inc → Summerlee Tipple; 1982-01-04 to 1982-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Graybeal Carl N & Jack L Williams → Summerlee Tipple; 1982-01-04 to 1982-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Graybeal Carl N & Jack L Williams → Plateau Coal Sales Inc; 1982-01-04 to 1982-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Pocahontas Coal Sales Inc → Summerlee Tipple; 1982-10-11 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Robert R  Bowling → Pocahontas Coal Sales Inc; 1982-10-11 to 1988-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Carbon Inc → Summerlee Tipple; 1988-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Goodwin Barry K → Summerlee Tipple; 1988-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodwin Barry K → Mountain Carbon Inc; 1988-07-20 to current/open; source msha-controller-operator-history