# Relationship history for MSHA mine 0800715

Current hierarchy: **Mosaic Company → Imc-Agrico → PHOSPHORIA MINE & MILL**

- 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:** Imc Fertilizer Inc → PHOSPHORIA MINE & MILL; 1950-01-01 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_mine:** IMC Global Inc → PHOSPHORIA MINE & MILL; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** IMC Global Inc → Imc Fertilizer Inc; 1950-01-01 to 1993-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Imc-Agrico → PHOSPHORIA MINE & MILL; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mosaic Company → PHOSPHORIA MINE & MILL; 1993-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mosaic Company → Imc-Agrico; 1993-07-01 to current/open; source msha-controller-operator-history