# Relationship history for MSHA mine 4002582

Current hierarchy: **Tony  Grooms → Tony Grooms Construction Company → Bell City No 1**

- 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:** Gresham L C Jr → Bell City No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Skinner → Bell City No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gleason Clay Products → Bell City No 1; 1979-12-01 to 1984-06-18; source msha-controller-operator-history
- **controller_controls_operator:** James A  Skinner → Gleason Clay Products; 1979-12-01 to 1984-06-18; source msha-controller-operator-history
- **operator_operates_mine:** Henderson Clay Products Inc → Bell City No 1; 1984-06-19 to 1987-03-02; source msha-controller-operator-history
- **controller_controls_operator:** Gresham L C Jr → Henderson Clay Products Inc; 1984-06-19 to 1987-03-02; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Grooms → Bell City No 1; 1987-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tony Grooms Construction Company → Bell City No 1; 1987-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Grooms → Tony Grooms Construction Company; 1987-03-03 to current/open; source msha-controller-operator-history