# Relationship history for MSHA mine 4703050

Current hierarchy: **Rohl Leo → Rohl Limestone Inc → Rohl Limestone Incorporated**

- 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:** Rohl Limestone Inc → Rohl Limestone Incorporated; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rohl Leo → Rohl Limestone Incorporated; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rohl Leo → Rohl Limestone Inc; 1994-09-01 to current/open; source msha-controller-operator-history