# Relationship history for MSHA mine 0600855

Current hierarchy: **Damien  Devlin → JDG Materials LLC → Haynes Quarry**

- 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:** John  Wright et al → Haynes Quarry; 2022-11-07 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Damien  Devlin → Haynes Quarry; 2024-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JDG Materials LLC → Haynes Quarry; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Wright et al → JDG Materials LLC; 2025-12-01 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Gary R  Martino et al → JDG Materials LLC; 2025-12-01 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Damien  Devlin et al → JDG Materials LLC; 2025-12-01 to 2024-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Damien  Devlin → JDG Materials LLC; 2025-12-01 to current/open; source msha-controller-operator-history