# Relationship history for MSHA mine 4607179

Current hierarchy: **Paul K  Moran → Kent Coal Company → Kent Unit Train Tipple #2**

- 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:** Paul K  Moran → Kent Unit Train Tipple #2; 1979-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kent Coal Company → Kent Unit Train Tipple #2; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul K  Moran → Kent Coal Company; 1986-08-01 to current/open; source msha-controller-operator-history