# Relationship history for MSHA mine 1510662

Current hierarchy: **Combs James → Combs Processing Company Inc → Jenny Prep Plant**

- 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:** Combs James → Jenny Prep Plant; 1973-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Combs Processing Company Inc → Jenny Prep Plant; 1976-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Combs James → Combs Processing Company Inc; 1976-11-01 to current/open; source msha-controller-operator-history