# Relationship history for MSHA mine 2800605

Current hierarchy: **Covia Holdings LLC → Covia Solutions LLC → Dividing Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** S C R-Sibelco Nv et al → Dividing Creek Plant; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Whitehead Brothers Company → Dividing Creek Plant; 1950-01-01 to 1980-06-12; source msha-controller-operator-history
- **controller_controls_mine:** WHIBCO, Inc. → Dividing Creek Plant; 1950-01-01 to 1980-06-12; source msha-controller-operator-history
- **controller_controls_operator:** WHIBCO, Inc. → Whitehead Brothers Company; 1950-01-01 to 1980-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Covia Solutions Inc. → Dividing Creek Plant; 1980-06-13 to 2024-07-31; source msha-controller-operator-history
- **controller_controls_operator:** S C R-Sibelco Nv et al → Covia Solutions Inc.; 1980-06-13 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → Dividing Creek Plant; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Covia Holdings LLC → Covia Solutions Inc.; 2021-01-01 to 2024-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Covia Solutions LLC → Dividing Creek Plant; 2024-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → Dividing Creek Plant; 2024-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Covia Holdings LLC → Covia Solutions LLC; 2024-08-01 to current/open; source msha-controller-operator-history