# Relationship history for MSHA mine 1101015

Current hierarchy: **Covia Holdings LLC → Covia Solutions LLC → Utica 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 → Utica Plant; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Bellrose Silica Company → Utica Plant; 1950-01-01 to 1981-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Paul A  Gerding → Utica Plant; 1950-01-01 to 1981-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Paul A  Gerding → Bellrose Silica Company; 1950-01-01 to 1981-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Covia Solutions Inc. → Utica Plant; 1981-02-15 to 2024-07-31; source msha-controller-operator-history
- **controller_controls_operator:** S C R-Sibelco Nv et al → Covia Solutions Inc.; 1981-02-15 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → Utica 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 → Utica Plant; 2024-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → Utica 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