# Relationship history for MSHA mine 1701116

Current hierarchy: **Patrick R  Thibodeau; Mandi Lee  Thibodeau → A&M Redi Mix Inc. → ROUND STONE-2**

- 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:** Patrick R  Thibodeau et al → ROUND STONE-2; 2022-04-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A&M Redi Mix Inc. → ROUND STONE-2; 2024-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick R  Thibodeau et al → A&M Redi Mix Inc.; 2024-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mandi Lee  Thibodeau et al → A&M Redi Mix Inc.; 2024-04-01 to current/open; source msha-controller-operator-history