# Relationship history for MSHA mine 1701062

Current hierarchy: **Patrick R  Thibodeau; Mandi Lee  Thibodeau → A&M REDIMIX INC → ROUND STONE**

- 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:** A&M REDIMIX INC → ROUND STONE; 2022-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mandi Lee  Thibodeau et al → ROUND STONE; 2022-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mandi Lee  Thibodeau et al → A&M REDIMIX INC; 2022-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick R  Thibodeau et al → A&M REDIMIX INC; 2022-04-13 to current/open; source msha-controller-operator-history