# Relationship history for MSHA mine 1513113

Current hierarchy: **Mc Gaw John Scott → Dawn Coal Company → Balls Hill No 5**

- 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

- **controller_controls_mine:** Mc Gaw John Scott → Balls Hill No 5; 1976-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dawn Coal Company → Balls Hill No 5; 1981-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Gaw John Scott → Dawn Coal Company; 1981-09-01 to current/open; source msha-controller-operator-history