# Relationship history for MSHA mine 0102985

Current hierarchy: **Omya Industries Inc → Omya Inc → Omya Alabama 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Omya Industries Inc → Omya Alabama Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alabama Carbonates, L.P. → Omya Alabama Plant; 1993-03-01 to 2005-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Carbonate Corporation → Omya Alabama Plant; 1993-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carbonate Corporation → Alabama Carbonates, L.P.; 1993-03-01 to 2005-05-01; source msha-controller-operator-history
- **controller_controls_operator:** OMYA Alabama Inc → Alabama Carbonates, L.P.; 1993-03-01 to 2005-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Omya Alabama, Inc. → Omya Alabama Plant; 2005-05-02 to 2009-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Omya Industries Inc → Omya Alabama, Inc.; 2005-05-02 to 2009-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Omya Industries Inc → Omya Alabama Plant; 2009-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Omya Inc → Omya Alabama Plant; 2009-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Omya Industries Inc → Omya Inc; 2009-02-18 to current/open; source msha-controller-operator-history