# Relationship history for MSHA mine 3101186

Current hierarchy: **Saunders Earl L Excavating Contractor → Earl L Saunders Excavating Contractor → Ferebee 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:** Earl L Saunders Excavating Contractor → Ferebee Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Saunders Earl L Excavating Contractor → Ferebee Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saunders Earl L Excavating Contractor → Earl L Saunders Excavating Contractor; 1950-01-01 to current/open; source msha-controller-operator-history