# Relationship history for MSHA mine 4607628

Current hierarchy: **Cline Clayton → Pine Creek Mining Inc → 3-A**

- 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:** Cline Clayton → 3-A; 1985-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pine Creek Mining Inc → 3-A; 1988-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Clayton → Pine Creek Mining Inc; 1988-11-01 to current/open; source msha-controller-operator-history