# Relationship history for MSHA mine 2700310

Current hierarchy: **Philip H  Mathewson → The Philip H Mathewson Co Inc → Mathewson Pit**

- 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:** Bradley Jackson Excavating → Mathewson Pit; 1996-11-01 to 2004-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Bradley  Jackson → Mathewson Pit; 1996-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley  Jackson → Bradley Jackson Excavating; 1996-11-01 to 2004-08-22; source msha-controller-operator-history
- **operator_operates_mine:** The Philip H Mathewson Co Inc → Mathewson Pit; 2004-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip H  Mathewson → Mathewson Pit; 2004-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip H  Mathewson → The Philip H Mathewson Co Inc; 2004-08-23 to current/open; source msha-controller-operator-history