# Relationship history for MSHA mine 4606839

Current hierarchy: **Cogar Lowell E Jr-Don Mc Kenzie → Summersville Energy Inc → Summersville Energy #1 Mine**

- 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:** Summersville Energy Inc → Summersville Energy #1 Mine; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cogar Lowell E Jr-Don Mc Kenzie Et Al → Summersville Energy #1 Mine; 1984-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cogar Lowell E Jr-Don Mc Kenzie Et Al → Summersville Energy Inc; 1984-09-01 to current/open; source msha-controller-operator-history