# Relationship history for MSHA mine 0900128

Current hierarchy: **Covia Holdings LLC → Covia Clay LLC → McIntyre 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:** S C R-Sibelco Nv et al → McIntyre Plant; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Evans Clay Company → McIntyre Plant; 1950-01-01 to 1989-12-31; source msha-controller-operator-history
- **controller_controls_mine:** R Marshall  Evans Jr → McIntyre Plant; 1950-01-01 to 1989-12-31; source msha-controller-operator-history
- **controller_controls_operator:** R Marshall  Evans Jr → Evans Clay Company; 1950-01-01 to 1989-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Sued-Chemie AG → McIntyre Plant; 1985-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Evans Clay Company → McIntyre Plant; 1990-01-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Comilog → McIntyre Plant; 1990-01-01 to 1998-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Comilog → Evans Clay Company; 1990-01-01 to 1998-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Albion Kaolin Company → McIntyre Plant; 1998-07-01 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sued-Chemie AG → Albion Kaolin Company; 1998-07-01 to 2000-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Covia Holdings Corporation → McIntyre Plant; 2000-06-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** S C R-Sibelco Nv et al → Covia Holdings Corporation; 2000-06-01 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → McIntyre Plant; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Covia Holdings LLC → Covia Holdings Corporation; 2021-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Covia Clay LLC → McIntyre Plant; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Covia Holdings LLC → Covia Clay LLC; 2021-01-01 to current/open; source msha-controller-operator-history