# Relationship history for MSHA mine 0900890

Current hierarchy: **J Eric  Tillirson → Thiele Kaolin Company → Butts 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

- **controller_controls_mine:** Paul R  Kirschling → Butts Mine; 1950-01-01 to 2015-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Thiele Kaolin Company → Butts Mine; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul R  Kirschling → Thiele Kaolin Company; 1979-01-01 to 2015-02-01; source msha-controller-operator-history
- **controller_controls_mine:** J Eric  Tillirson et al → Butts Mine; 2015-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Eric  Tillirson et al → Thiele Kaolin Company; 2015-02-02 to current/open; source msha-controller-operator-history