# Relationship history for MSHA mine 0900110

Current hierarchy: **J Eric  Tillirson → Thiele Kaolin Company → Deepstep Road 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** English China Clays PLC → Deepstep Road Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Industrial Clay Company → Deepstep Road Plant; 1950-01-01 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Yara Engineering Corp → Deepstep Road Plant; 1950-01-01 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Yara Engineering Corp → American Industrial Clay Company; 1950-01-01 to 1980-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Paul R  Kirschling → Deepstep Road Plant; 1950-01-01 to 2015-02-01; source msha-controller-operator-history
- **operator_operates_mine:** C-E Georgia Kaolin Company Inc → Deepstep Road Plant; 1980-10-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Asea Brown Boveri Ltd (ABB) → Deepstep Road Plant; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asea Brown Boveri Ltd (ABB) → C-E Georgia Kaolin Company Inc; 1980-10-01 to 1990-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Anglo American Clays Corp → Deepstep Road Plant; 1990-12-28 to 1999-12-21; source msha-controller-operator-history
- **controller_controls_operator:** English China Clays PLC → Anglo American Clays Corp; 1990-12-28 to 1999-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Imerys Clays Inc → Deepstep Road Plant; 1999-12-22 to 2022-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → Deepstep Road Plant; 1999-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → Imerys Clays Inc; 1999-12-22 to 2022-02-28; source msha-controller-operator-history
- **controller_controls_mine:** J Eric  Tillirson et al → Deepstep Road Plant; 2015-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thiele Kaolin Company → Deepstep Road Plant; 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