# Relationship history for MSHA mine 1511530

Current hierarchy: **Breeding Verlon & Lincoln → L & V Coal Company → No 4 Mine**

- 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:** Breeding Verlon & Lincoln → No 4 Mine; 1977-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & V Coal Company → No 4 Mine; 1978-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Breeding Verlon & Lincoln → L & V Coal Company; 1978-08-01 to current/open; source msha-controller-operator-history