# Relationship history for MSHA mine 3800040

Current hierarchy: **Charles D  Taylor → Taylor Clay Products → TAYLOR MINE**

- 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:** Charles D  Taylor → TAYLOR MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R E  Russell → TAYLOR MINE; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Clay Products → TAYLOR MINE; 1979-03-01 to 1979-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  Taylor → Taylor Clay Products; 1979-03-01 to 1979-09-17; source msha-controller-operator-history
- **operator_operates_mine:** J T Russell & Sons Company Inc → TAYLOR MINE; 1979-09-18 to 1989-10-16; source msha-controller-operator-history
- **controller_controls_operator:** R E  Russell → J T Russell & Sons Company Inc; 1979-09-18 to 1989-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Clay Products → TAYLOR MINE; 1989-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  Taylor → Taylor Clay Products; 1989-10-17 to current/open; source msha-controller-operator-history