# Relationship history for MSHA mine 1510241

Current hierarchy: **Davis Jefferson B → J B D Mining Company Inc → Piedmont 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

- **controller_controls_mine:** Thomas King  Evans → Piedmont Tipple; 1976-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Commonwealth Excavating Company Inc → Piedmont Tipple; 1977-05-01 to 1979-05-15; source msha-controller-operator-history
- **controller_controls_mine:** Tucker J O → Piedmont Tipple; 1977-05-01 to 1979-05-15; source msha-controller-operator-history
- **controller_controls_operator:** Tucker J O → Commonwealth Excavating Company Inc; 1977-05-01 to 1979-05-15; source msha-controller-operator-history
- **operator_operates_mine:** Master Mining Company Inc → Piedmont Tipple; 1979-05-16 to 1980-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Mc Dade Richard → Piedmont Tipple; 1979-05-16 to 1980-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Mc Dade Richard → Master Mining Company Inc; 1979-05-16 to 1980-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Debra Lynn Coals Inc → Piedmont Tipple; 1980-07-17 to 1991-05-06; source msha-controller-operator-history
- **controller_controls_operator:** Thomas King  Evans → Debra Lynn Coals Inc; 1980-07-17 to 1991-05-06; source msha-controller-operator-history
- **controller_controls_mine:** Davis Jefferson B → Piedmont Tipple; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J B D Mining Company Inc → Piedmont Tipple; 1991-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Jefferson B → J B D Mining Company Inc; 1991-05-07 to current/open; source msha-controller-operator-history