# Relationship history for MSHA mine 0503046

Current hierarchy: **Charter Oil Company → Multi Mineral Corp → U S B M No 1 Shaft**

- 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:** Harrison Western Corp → U S B M No 1 Shaft; 1950-01-01 to 1979-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Lilley F J C → U S B M No 1 Shaft; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lilley F J C → Harrison Western Corp; 1950-01-01 to 1979-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Multi Mineral Corp → U S B M No 1 Shaft; 1979-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charter Oil Company → U S B M No 1 Shaft; 1979-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charter Oil Company → Multi Mineral Corp; 1979-06-20 to current/open; source msha-controller-operator-history