# Relationship history for MSHA mine 4607130

Current hierarchy: **Kerns William E → Octagon Associates Inc → Reedsville #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:** Octagon Associates Inc → Reedsville #1; 1986-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kerns William E → Reedsville #1; 1986-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerns William E → Octagon Associates Inc; 1986-05-01 to current/open; source msha-controller-operator-history