# Relationship history for MSHA mine 3402187

Current hierarchy: **Bobby  Coyle; Jarrod  Coyle → Coyle Stone LLC → Deward Martin #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Bobby  Coyle et al → Deward Martin #1; 2014-08-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coyle Stone LLC → Deward Martin #1; 2018-12-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Coyle et al → Coyle Stone LLC; 2018-12-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jarrod  Coyle et al → Coyle Stone LLC; 2018-12-24 to current/open; source msha-controller-operator-history