# Relationship history for MSHA mine 4608286

Current hierarchy: **Carmen  D'Angelo → Coal Cave Inc → Totten Ridge Surface**

- 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:** Carmen  D'Angelo → Totten Ridge Surface; 1977-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Coal Cave Inc → Totten Ridge Surface; 1993-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmen  D'Angelo → Coal Cave Inc; 1993-03-01 to current/open; source msha-controller-operator-history