# Relationship history for MSHA mine 4405278

Current hierarchy: **Compton C Eugene → Price Coal Company → No 1 Mine**

- 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:** Price Coal Company → No 1 Mine; 1979-08-01 to 1980-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Price Junior V → No 1 Mine; 1979-08-01 to 1980-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Price Junior V → Price Coal Company; 1979-08-01 to 1980-08-17; source msha-controller-operator-history
- **operator_operates_mine:** Price Coal Company → No 1 Mine; 1980-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Compton C Eugene → No 1 Mine; 1980-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Compton C Eugene → Price Coal Company; 1980-08-18 to current/open; source msha-controller-operator-history