# Relationship history for MSHA mine 0800183

Current hierarchy: **Nutrien LTD → Pcs Phosphate - White Springs → SUWANNEE RIVER MINE**

- 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

- **operator_operates_mine:** White Springs Agricultural Chemicals Inc → SUWANNEE RIVER MINE; 1950-01-01 to 1995-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Occidental Petroleum Corp → SUWANNEE RIVER MINE; 1950-01-01 to 1996-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Occidental Petroleum Corp → White Springs Agricultural Chemicals Inc; 1950-01-01 to 1995-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Pcs Phosphate - White Springs → SUWANNEE RIVER MINE; 1995-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potash Corp Of Saskatchewan → SUWANNEE RIVER MINE; 1995-11-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Potash Corp Of Saskatchewan → Pcs Phosphate - White Springs; 1995-11-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Nutrien LTD → SUWANNEE RIVER MINE; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nutrien LTD → Pcs Phosphate - White Springs; 2018-01-01 to current/open; source msha-controller-operator-history