# Relationship history for MSHA mine 4406042

Current hierarchy: **Johnson Patrick R → Northern Coal Company → No 3**

- 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:** Jordan Dave → No 3; 1980-09-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Raven Red Ash Coal Corp → No 3; 1983-12-01 to 1986-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Jordan Dave → Raven Red Ash Coal Corp; 1983-12-01 to 1986-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Patrick R Et Al → No 3; 1986-03-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northern Coal Company → No 3; 1986-09-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Patrick R Et Al → Northern Coal Company; 1986-09-23 to current/open; source msha-controller-operator-history