# Relationship history for MSHA mine 4604587

Current hierarchy: **Frazee Donald F → Kleen Coal Company → Karen No 1 Cleaning 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

- **operator_operates_mine:** Kleen Coal Company → Karen No 1 Cleaning Plant; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frazee Donald F Et Al → Karen No 1 Cleaning Plant; 1975-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frazee Donald F Et Al → Kleen Coal Company; 1975-05-01 to current/open; source msha-controller-operator-history