# Relationship history for MSHA mine 4607473

Current hierarchy: **Mc Coy Oscar A Jr → Beech Grove Coal Company → Mine #3**

- 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:** Mc Coy Oscar A Jr → Mine #3; 1979-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beech Grove Coal Company → Mine #3; 1988-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Oscar A Jr → Beech Grove Coal Company; 1988-03-01 to current/open; source msha-controller-operator-history