# Relationship history for MSHA mine 4201801

Current hierarchy: **Savage Companies → Carbon Transport Corp → Wildcat Train Loading Facility**

- 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:** Carbon Transport Corp → Wildcat Train Loading Facility; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Savage Companies → Wildcat Train Loading Facility; 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Savage Companies → Carbon Transport Corp; 1982-09-01 to current/open; source msha-controller-operator-history