# Relationship history for MSHA mine 0101787

Current hierarchy: **Lambert Ray A → Whetstone Coal Company Inc → Brushy Pond Pit No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Layne Fred → Brushy Pond Pit No 1; 1977-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Mining Company Inc → Brushy Pond Pit No 1; 1977-09-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Layne Fred → Southeastern Mining Company Inc; 1977-09-01 to 1977-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Whetstone Coal Company Inc → Brushy Pond Pit No 1; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lambert Ray A → Brushy Pond Pit No 1; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lambert Ray A → Whetstone Coal Company Inc; 1977-10-01 to current/open; source msha-controller-operator-history