# Relationship history for MSHA mine 1510456

Current hierarchy: **Owens Paul B → C O S Inc → No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Millard Coal Company Inc → No 1 Tipple; 1977-05-01 to 1978-08-20; source msha-controller-operator-history
- **controller_controls_mine:** P C K Corp → No 1 Tipple; 1977-05-01 to 1978-08-20; source msha-controller-operator-history
- **controller_controls_operator:** P C K Corp → Millard Coal Company Inc; 1977-05-01 to 1978-08-20; source msha-controller-operator-history
- **operator_operates_mine:** C O S Inc → No 1 Tipple; 1978-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Owens Paul B → No 1 Tipple; 1978-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owens Paul B → C O S Inc; 1978-08-21 to current/open; source msha-controller-operator-history