# Relationship history for MSHA mine 4404177

Current hierarchy: **Carter Philip → Big C Coal Co Inc → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Carter Philip → No 1 Strip Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big C Coal Co Inc → No 1 Strip Mine; 1975-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carter Philip → Big C Coal Co Inc; 1975-09-01 to current/open; source msha-controller-operator-history