# Relationship history for MSHA mine 4002101

Current hierarchy: **Miller Meredith & Rex D Martin → Crabtree Coal Company Inc → No 1 Surface**

- 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:** Crabtree James H → No 1 Surface; 1975-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crabtree Coal Company → No 1 Surface; 1976-08-23 to 1980-06-10; source msha-controller-operator-history
- **controller_controls_operator:** Crabtree James H → Crabtree Coal Company; 1976-08-23 to 1980-06-10; source msha-controller-operator-history
- **operator_operates_mine:** Crabtree Coal Company Inc → No 1 Surface; 1980-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Miller Meredith & Rex D Martin → No 1 Surface; 1980-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Miller Meredith & Rex D Martin → Crabtree Coal Company Inc; 1980-06-11 to current/open; source msha-controller-operator-history