# Relationship history for MSHA mine 3304578

Current hierarchy: **Rogers Group Inc → Arch Materials LLC → Batavia 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

- **operator_operates_mine:** Arch Materials LLC → Batavia Mine; 2006-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ben L  Rechter et al → Batavia Mine; 2006-10-16 to 2014-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Ben L  Rechter et al → Arch Materials LLC; 2006-10-16 to 2014-01-30; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Group Inc → Batavia Mine; 2014-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Arch Materials LLC; 2014-01-31 to current/open; source msha-controller-operator-history