# Relationship history for MSHA mine 4500978

Current hierarchy: **Leroy  Burns → Burns Rock Company → Elochoman Pit And Plant**

- 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:** Burns Rock Company → Elochoman Pit And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leroy  Burns → Elochoman Pit And Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Burns → Burns Rock Company; 1950-01-01 to current/open; source msha-controller-operator-history