# Relationship history for MSHA mine 4406040

Current hierarchy: **Cantrell Guy S → Cantrell Mining Company Inc → No 3**

- 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:** Cantrell Guy S → No 3; 1981-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cantrell Anita → No 3; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A G M Coal Company Inc → No 3; 1983-11-01 to 1984-03-21; source msha-controller-operator-history
- **controller_controls_operator:** Cantrell Anita → A G M Coal Company Inc; 1983-11-01 to 1984-03-21; source msha-controller-operator-history
- **operator_operates_mine:** Double D & R Coal Company → No 3; 1984-03-22 to 1984-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Dingus Lowell Et Al → No 3; 1984-03-22 to 1984-04-18; source msha-controller-operator-history
- **controller_controls_operator:** Dingus Lowell Et Al → Double D & R Coal Company; 1984-03-22 to 1984-04-18; source msha-controller-operator-history
- **operator_operates_mine:** A G M Coal Company Inc → No 3; 1984-04-19 to 1984-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Cantrell Anita → A G M Coal Company Inc; 1984-04-19 to 1984-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Cantrell Mining Company Inc → No 3; 1984-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cantrell Guy S → Cantrell Mining Company Inc; 1984-08-20 to current/open; source msha-controller-operator-history