# Relationship history for MSHA mine 4604042

Current hierarchy: **Hatfield Richard & J Charles Lockhart → New Elk Coal Company → No 1 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

- **operator_operates_mine:** New Elk Coal Company → No 1 Mine; 1974-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hatfield Richard & J Charles Lockhart Et Al → No 1 Mine; 1974-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hatfield Richard & J Charles Lockhart Et Al → New Elk Coal Company; 1974-02-21 to current/open; source msha-controller-operator-history