# Relationship history for MSHA mine 4002480

Current hierarchy: **Thomason Roy G → Mountain Movers Inc → No 2 Strip**

- 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:** Eastern Mining & Minerals Inc → No 2 Strip; 1978-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Mining & Minerals Inc → No 2 Strip; 1978-10-01 to 1979-12-11; source msha-controller-operator-history
- **controller_controls_operator:** Eastern Mining & Minerals Inc → Eastern Mining & Minerals Inc; 1978-10-01 to 1979-12-11; source msha-controller-operator-history
- **controller_controls_mine:** Thomason Roy G → No 2 Strip; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Movers Inc → No 2 Strip; 1979-12-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomason Roy G → Mountain Movers Inc; 1979-12-12 to current/open; source msha-controller-operator-history