# Relationship history for MSHA mine 1519131

Current hierarchy: **Carl  Kirk → Marshall Mining Inc → No 4A**

- 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:** Carl  Kirk et al → No 4A; 2000-05-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marshall Mining Inc → No 4A; 2007-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Kirk et al → Marshall Mining Inc; 2007-07-13 to current/open; source msha-controller-operator-history