# Relationship history for MSHA mine 4503846

Current hierarchy: **Josh  Therens → Core Rock Products → Lyons Station**

- 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:** Core Rock Products → Lyons Station; 2024-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Josh  Therens → Lyons Station; 2024-06-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Josh  Therens → Core Rock Products; 2024-06-04 to current/open; source msha-controller-operator-history