# Relationship history for MSHA mine 0102830

Current hierarchy: **Chamblee Derrell → W C Management Inc → Kimberly Pit**

- 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:** Chamblee Derrell Et Al → Kimberly Pit; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W C Management Inc → Kimberly Pit; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chamblee Derrell Et Al → W C Management Inc; 1989-10-01 to current/open; source msha-controller-operator-history