# Relationship history for MSHA mine 4608475

Current hierarchy: **Antulov Thomas F & Steven D → Marion Limestone Inc → Tomahawk #1**

- 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:** Marion Limestone Inc → Tomahawk #1; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Antulov Thomas F & Steven D Et Al → Tomahawk #1; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antulov Thomas F & Steven D Et Al → Marion Limestone Inc; 1995-03-01 to current/open; source msha-controller-operator-history