# Relationship history for MSHA mine 3304807

Current hierarchy: **PL Lockbourne II LLC; SJ Materials LLC; PL Lockbourne LLC → Lockbourne Materials LLC → Lockbourne**

- 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:** Lockbourne Materials LLC → Lockbourne; 2024-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** PL Lockbourne II LLC et al → Lockbourne; 2024-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** PL Lockbourne II LLC et al → Lockbourne Materials LLC; 2024-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SJ Materials LLC et al → Lockbourne Materials LLC; 2024-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** PL Lockbourne LLC et al → Lockbourne Materials LLC; 2024-06-27 to current/open; source msha-controller-operator-history