# Relationship history for MSHA mine 1601486

Current hierarchy: **Matthew Ward  Hanna → Pinnacle Materials LLC → Covington**

- 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:** Robert L  Drake et al → Covington; 2005-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** RB&J MATERIALS LLC → Covington; 2008-11-17 to 2011-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Drake et al → RB&J MATERIALS LLC; 2008-11-17 to 2011-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Matthew Ward  Hanna → Covington; 2010-08-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Materials LLC → Covington; 2011-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew Ward  Hanna → Pinnacle Materials LLC; 2011-06-06 to current/open; source msha-controller-operator-history