# Relationship history for MSHA mine 4404967

Current hierarchy: **Smith Glen A → Loose Jaw Coal Company No 4 Inc → No 1**

- 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:** Loose Jaw Coal Company No 4 Inc → No 1; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Glen A → No 1; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Glen A → Loose Jaw Coal Company No 4 Inc; 1978-01-01 to current/open; source msha-controller-operator-history