# Relationship history for MSHA mine 5001032

Current hierarchy: **Vial David B → Clara Bea Inc → Clara Bea Incorporated**

- 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

- **operator_operates_mine:** B W Exploration → Clara Bea Incorporated; 1950-01-01 to 1980-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Berg & Wetlesen → Clara Bea Incorporated; 1950-01-01 to 1980-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Berg & Wetlesen → B W Exploration; 1950-01-01 to 1980-07-14; source msha-controller-operator-history
- **operator_operates_mine:** J M C Ltd → Clara Bea Incorporated; 1980-07-15 to 1984-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Jensen Alan Et Al → Clara Bea Incorporated; 1980-07-15 to 1984-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Jensen Alan Et Al → J M C Ltd; 1980-07-15 to 1984-06-20; source msha-controller-operator-history
- **operator_operates_mine:** Clara Bea Inc → Clara Bea Incorporated; 1984-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vial David B → Clara Bea Incorporated; 1984-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vial David B → Clara Bea Inc; 1984-06-21 to current/open; source msha-controller-operator-history