# Relationship history for MSHA mine 3608120

Current hierarchy: **John B  Haines IV; John R  Kibblehouse → Chestnut Ridge Sand/Div Haines & Kibblehouse Inc → CHESTNUT RIDGE SAND**

- 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:** Chestnut Ridge Sand/Div Haines & Kibblehouse Inc → CHESTNUT RIDGE SAND; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John B  Haines IV et al → CHESTNUT RIDGE SAND; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John B  Haines IV et al → Chestnut Ridge Sand/Div Haines & Kibblehouse Inc; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R  Kibblehouse et al → Chestnut Ridge Sand/Div Haines & Kibblehouse Inc; 1989-10-01 to current/open; source msha-controller-operator-history