# Relationship history for MSHA mine 3304070

Current hierarchy: **Davis Kenneth A → Davis Coal Company Inc → Newt Mine 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:** Davis Coal Company Inc → Newt Mine 1; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davis Kenneth A → Newt Mine 1; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Kenneth A → Davis Coal Company Inc; 1986-11-01 to current/open; source msha-controller-operator-history