# Relationship history for MSHA mine 0800184

Current hierarchy: **Cavelier Keith → Sun Phosphate Company → Granular Plant**

- 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:** Sun Phosphate-Division/Thompson Sales Co Inc → Granular Plant; 1950-01-01 to 1984-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Thompson D E Jr → Granular Plant; 1950-01-01 to 1984-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Thompson D E Jr → Sun Phosphate-Division/Thompson Sales Co Inc; 1950-01-01 to 1984-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Sun Phosphate Company → Granular Plant; 1984-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cavelier Keith → Granular Plant; 1984-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cavelier Keith → Sun Phosphate Company; 1984-04-01 to current/open; source msha-controller-operator-history