# Relationship history for MSHA mine 4400269

Current hierarchy: **Sunny  Barton → Long Ridge Coal Company Inc → No 1**

- 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

- **operator_operates_mine:** Clinchfield Coal Company → No 1; 1950-01-01 to 2000-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Clinchfield Coal Company; 1950-01-01 to 2000-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Long Ridge Coal Company Inc → No 1; 2000-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sunny  Barton → No 1; 2000-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunny  Barton → Long Ridge Coal Company Inc; 2000-01-24 to current/open; source msha-controller-operator-history