# Relationship history for MSHA mine 0900474

Current hierarchy: **J Eric  Tillirson → Thiele Kaolin Company → Gibraltar Operations**

- 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:** BASF Catalysts LLC → Gibraltar Operations; 1950-01-01 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Engelhard Corp → Gibraltar Operations; 1950-01-01 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Engelhard Corp → BASF Catalysts LLC; 1950-01-01 to 2006-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul R  Kirschling → Gibraltar Operations; 1950-01-01 to 2015-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → Gibraltar Operations; 1999-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Gibraltar Operations; 2006-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Catalysts LLC; 2006-08-01 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_mine:** BASF SE → Gibraltar Operations; 2007-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BASF Corporation → Gibraltar Operations; 2010-04-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_operator:** BASF SE → BASF Corporation; 2010-04-01 to 2016-03-31; source msha-controller-operator-history
- **controller_controls_mine:** J Eric  Tillirson et al → Gibraltar Operations; 2015-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** IMERYS Clays, Inc → Gibraltar Operations; 2016-04-01 to 2022-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → IMERYS Clays, Inc; 2016-04-01 to 2022-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Thiele Kaolin Company → Gibraltar Operations; 2022-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Eric  Tillirson et al → Thiele Kaolin Company; 2022-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Kirschling → Thiele Kaolin Company; 2022-03-01 to 2015-02-01; source msha-controller-operator-history