# Relationship history for MSHA mine 3002701

Current hierarchy: **L C Whitford Company Inc → L C Whitford Company Inc → Morton Pit**

- 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:** L C Whitford Company Inc → Morton Pit; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** L C Whitford Company Inc → Morton Pit; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L C Whitford Company Inc → L C Whitford Company Inc; 1985-09-01 to current/open; source msha-controller-operator-history