# Relationship history for MSHA mine 1519206

Current hierarchy: **James River Coal Company → James River Coal Service Company → Hog Trough**

- 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:** James River Coal Company → Hog Trough; 2006-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** James River Coal Service Company → Hog Trough; 2008-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → James River Coal Service Company; 2008-03-25 to current/open; source msha-controller-operator-history