# Relationship history for MSHA mine 4607255

Current hierarchy: **Maynard Richard-Lowell Robinson → Lindy Coal Company → Lindy No 2 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

- **operator_operates_mine:** Lindy Coal Company → Lindy No 2 Surface; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maynard Richard-Lowell Robinson Et Al → Lindy No 2 Surface; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maynard Richard-Lowell Robinson Et Al → Lindy Coal Company; 1987-01-01 to current/open; source msha-controller-operator-history