# Relationship history for MSHA mine 4406395

Current hierarchy: **Horn Bill E → Brent Coal Corp → No 2 Mine**

- 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:** Horn Bill E → No 2 Mine; 1983-09-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Old Oak Mining Inc → No 2 Mine; 1987-08-01 to 1989-09-19; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Jeffery → No 2 Mine; 1987-08-01 to 1989-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Jeffery → Old Oak Mining Inc; 1987-08-01 to 1989-09-19; source msha-controller-operator-history
- **operator_operates_mine:** Brent Coal Corp → No 2 Mine; 1989-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horn Bill E → Brent Coal Corp; 1989-09-20 to current/open; source msha-controller-operator-history