# Relationship history for MSHA mine 3601714

Current hierarchy: **Lawrence A  Petrole → Joe Petrole Coal Sales LLC → Beaver Brook 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

- **operator_operates_mine:** Beaver Brook Coal Company → Beaver Brook Mine; 1950-01-01 to 2006-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Huss George & William → Beaver Brook Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Huss George & William → Beaver Brook Coal Company; 1950-01-01 to 2006-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Joseph R  Petrole Sr → Beaver Brook Mine; 1997-08-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Joe Petrole Coal Sales → Beaver Brook Mine; 2006-10-18 to 2009-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R  Petrole Sr → Joe Petrole Coal Sales; 2006-10-18 to 2009-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Joe Petrole Coal Sales → Beaver Brook Mine; 2009-06-05 to 2010-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence A  Petrole → Beaver Brook Mine; 2009-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence A  Petrole → Joe Petrole Coal Sales; 2009-06-05 to 2010-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Joe Petrole Coal Sales LLC → Beaver Brook Mine; 2010-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence A  Petrole → Beaver Brook Mine; 2010-06-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence A  Petrole → Joe Petrole Coal Sales LLC; 2010-06-29 to current/open; source msha-controller-operator-history