# Relationship history for MSHA mine 3304420

Current hierarchy: **Amos  Rawson → C & E Coal Inc → James 9w 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

- **controller_controls_mine:** Amos  Rawson → James 9w Pit; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & E Coal Inc → James 9w Pit; 1998-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amos  Rawson → C & E Coal Inc; 1998-04-01 to current/open; source msha-controller-operator-history