# Relationship history for MSHA mine 3304000

Current hierarchy: **Mc Cullough Ronald W → Mc Cullough Mining Inc → Ohio Auger #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

- **controller_controls_mine:** Mc Cullough Earl → Ohio Auger #1; 1984-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & E Inc → Ohio Auger #1; 1985-01-01 to 1987-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cullough Earl → B & E Inc; 1985-01-01 to 1987-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Mc Cullough Ronald W → Ohio Auger #1; 1987-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Cullough Mining Inc → Ohio Auger #1; 1987-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cullough Ronald W → Mc Cullough Mining Inc; 1987-02-19 to current/open; source msha-controller-operator-history