# Relationship history for MSHA mine 1508445

Current hierarchy: **Desalvo Russell → Little King Coal Mining & Leasing Company → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Little King Coal Mining & Leasing Company → No 1 Strip; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Desalvo Russell → No 1 Strip; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Desalvo Russell → Little King Coal Mining & Leasing Company; 1975-05-01 to current/open; source msha-controller-operator-history