# Relationship history for MSHA mine 3608283

Current hierarchy: **Holben Michael G → Macro Coal Company → Reed Operation**

- 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:** Macro Coal Company → Reed Operation; 1991-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holben Michael G → Reed Operation; 1991-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Holben Michael G → Macro Coal Company; 1991-09-01 to current/open; source msha-controller-operator-history