# Relationship history for MSHA mine 1002062

Current hierarchy: **Arthur James Lacey → Lacey Rock & Gravel → Lacey Rock & Gravel**

- 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

- **operator_operates_mine:** Lacey Rock & Gravel → Lacey Rock & Gravel; 2004-10-08 to 2024-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Art N  Lacey et al → Lacey Rock & Gravel; 2004-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Art N  Lacey et al → Lacey Rock & Gravel; 2004-10-08 to 2024-04-01; source msha-controller-operator-history
- **controller_controls_operator:** A J  Lacey et al → Lacey Rock & Gravel; 2004-10-08 to 2024-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Lacey Rock & Gravel → Lacey Rock & Gravel; 2024-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arthur James Lacey → Lacey Rock & Gravel; 2024-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arthur James Lacey → Lacey Rock & Gravel; 2024-04-02 to current/open; source msha-controller-operator-history