# Relationship history for MSHA mine 1518898

Current hierarchy: **James River Coal Company → James River Coal Service Company → Commissary Surface Job**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** James River Coal Company → Commissary Surface Job; 1998-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Diamond Coal Company → Commissary Surface Job; 2005-07-14 to 2008-02-29; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Blue Diamond Coal Company; 2005-07-14 to 2008-02-29; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → Commissary Surface Job; 2006-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** James River Coal Service Company → Commissary Surface Job; 2008-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → James River Coal Service Company; 2008-03-01 to current/open; source msha-controller-operator-history