# Relationship history for MSHA mine 4405370

Current hierarchy: **Little Darrel → Little K Coal Company → No 2 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Little Darrel → No 2 Strip; 1979-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little K Coal Company → No 2 Strip; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Little Darrel → Little K Coal Company; 1980-02-01 to current/open; source msha-controller-operator-history