# Relationship history for MSHA mine 3400917

Current hierarchy: **Stallings Excavating Co → Four Star Mining Co Inc → Four Star No 1 Strip 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Four Star Mining Co Inc → Four Star No 1 Strip Mine; 1975-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stallings Excavating Co → Four Star No 1 Strip Mine; 1975-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stallings Excavating Co → Four Star Mining Co Inc; 1975-08-01 to current/open; source msha-controller-operator-history