# Relationship history for MSHA mine 1201594

Current hierarchy: **Green Robert A → Crag Corp → Lady Anne No 1 Strip**

- 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

- **operator_operates_mine:** Crag Corp → Lady Anne No 1 Strip; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Green Robert A → Lady Anne No 1 Strip; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Green Robert A → Crag Corp; 1977-07-01 to current/open; source msha-controller-operator-history