# Relationship history for MSHA mine 0100590

Current hierarchy: **Mike  Gentry → Gentry Sand & Gravel Inc → HUNTER STATION DIVISION**

- 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:** Hunter Station-Russell Inc → HUNTER STATION DIVISION; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Sand & Gravel Company → HUNTER STATION DIVISION; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Frank N  Harrison → HUNTER STATION DIVISION; 1950-01-01 to 1982-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Frank N  Harrison → Dixie Sand & Gravel Company; 1950-01-01 to 1978-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Station-Russell Inc → HUNTER STATION DIVISION; 1978-10-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Hunter Station-Russell Inc → Hunter Station-Russell Inc; 1978-10-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Station Sand & Gravel Inc → HUNTER STATION DIVISION; 1987-01-01 to 1996-10-10; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Godwin → HUNTER STATION DIVISION; 1987-01-01 to 1996-10-10; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Godwin → Hunter Station Sand & Gravel Inc; 1987-01-01 to 1996-10-10; source msha-controller-operator-history
- **operator_operates_mine:** Gentry Sand & Gravel Inc → HUNTER STATION DIVISION; 1996-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Gentry → HUNTER STATION DIVISION; 1996-10-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Gentry → Gentry Sand & Gravel Inc; 1996-10-11 to current/open; source msha-controller-operator-history