# Relationship history for MSHA mine 4400681

Current hierarchy: **Justus Steven T → Steven Theodore Justus Coal Corp → No 3 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:** Lassie Coal Corp → No 3 Mine; 1950-01-01 to 1973-04-30; source msha-controller-operator-history
- **controller_controls_mine:** E H  Lester → No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E H  Lester → Lassie Coal Corp; 1950-01-01 to 1973-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Steven Theodore Justus Coal Corp → No 3 Mine; 1973-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justus Steven T → No 3 Mine; 1973-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justus Steven T → Steven Theodore Justus Coal Corp; 1973-05-01 to current/open; source msha-controller-operator-history