# Relationship history for MSHA mine 4608206

Current hierarchy: **Horizon Natural Resources Incorporated → Appalachian Mining Inc → Campbells Creek Stockton-Lewiston#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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Horizon Natural Resources Incorporated → Campbells Creek Stockton-Lewiston#1; 1988-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Mining Inc → Campbells Creek Stockton-Lewiston#1; 1992-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horizon Natural Resources Incorporated → Appalachian Mining Inc; 1992-08-01 to current/open; source msha-controller-operator-history