# Relationship history for MSHA mine 4404173

Current hierarchy: **Strouth Philmon → Phil Strouth Coal Company → 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

- **controller_controls_mine:** Strouth Philmon Et Al → No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phil Strouth Coal Company → No 3 Mine; 1975-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strouth Philmon Et Al → Phil Strouth Coal Company; 1975-09-16 to current/open; source msha-controller-operator-history