# Relationship history for MSHA mine 4405280

Current hierarchy: **Varney Danny → D & L Coal Company → No 3 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Varney Danny Et Al → No 3 Mine; 1977-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** D & L Coal Company → No 3 Mine; 1979-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Varney Danny Et Al → D & L Coal Company; 1979-09-01 to current/open; source msha-controller-operator-history