# Relationship history for MSHA mine 3301184

Current hierarchy: **Carmeuse Holding SA → Carmeuse Lime Inc → Grand River Operation**

- 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:** Republic Steel Corp → Grand River Operation; 1950-01-01 to 1984-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Republic Steel Corp → Grand River Operation; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Republic Steel Corp → Republic Steel Corp; 1950-01-01 to 1984-10-15; source msha-controller-operator-history
- **operator_operates_mine:** LTV Steel Lime Plant → Grand River Operation; 1984-10-16 to 2002-07-14; source msha-controller-operator-history
- **controller_controls_mine:** LTV Corp → Grand River Operation; 1984-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LTV Corp → LTV Steel Lime Plant; 1984-10-16 to 2002-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Grand River Operation; 1997-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse Lime Inc → Grand River Operation; 2002-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime Inc; 2002-07-15 to current/open; source msha-controller-operator-history