# Relationship history for MSHA mine 4609671

Current hierarchy: **Appalachian Resource Company LLC → Appalachian Resource West Virginia,LLC → Beech Creek North Surface Mine**

- 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

- **controller_controls_mine:** Appalachian Resource Company LLC → Beech Creek North Surface Mine; 2020-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Resource West Virginia,LLC → Beech Creek North Surface Mine; 2025-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Appalachian Resource Company LLC → Appalachian Resource West Virginia,LLC; 2025-03-19 to current/open; source msha-controller-operator-history