# Relationship history for MSHA mine 0301485

Current hierarchy: **Mc Clure Jack → Jack Mc Clure Mining Company Inc → Vesta #1**

- 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:** Black Crystal Company → Vesta #1; 1980-06-01 to 1981-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Harvey Norman L Jr → Vesta #1; 1980-06-01 to 1981-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Harvey Norman L Jr → Black Crystal Company; 1980-06-01 to 1981-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Jack Mc Clure Mining Company Inc → Vesta #1; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Clure Jack → Vesta #1; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Clure Jack → Jack Mc Clure Mining Company Inc; 1981-02-01 to current/open; source msha-controller-operator-history