# Relationship history for MSHA mine 2200329

Current hierarchy: **Gates W A Jr → Magnolia Sand & Gravel → PLANT C**

- 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

- **operator_operates_mine:** Diamond & Rader Inc → PLANT C; 1950-01-01 to 1988-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Diamond Grady J → PLANT C; 1950-01-01 to 1988-07-07; source msha-controller-operator-history
- **controller_controls_operator:** Diamond Grady J → Diamond & Rader Inc; 1950-01-01 to 1988-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Magnolia Sand & Gravel → PLANT C; 1988-07-08 to 1991-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Gates W A Jr → PLANT C; 1988-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gates W A Jr → Magnolia Sand & Gravel; 1988-07-08 to 1991-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Magnolia Sand & Gravel Inc → PLANT C; 1991-07-10 to 1992-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Bond Larry A & Sherrill High → PLANT C; 1991-07-10 to 1992-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Bond Larry A & Sherrill High → Magnolia Sand & Gravel Inc; 1991-07-10 to 1992-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Magnolia Sand & Gravel → PLANT C; 1992-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gates W A Jr → Magnolia Sand & Gravel; 1992-03-25 to current/open; source msha-controller-operator-history