# Relationship history for MSHA mine 3601886

Current hierarchy: **Kintzel Stephen → Kintzel Coal Company → Lykens #6 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:** Kintzel Coal Company → Lykens #6 Mine; 1950-01-01 to 1988-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Kintzel Wayne & Jesse Et Al → Lykens #6 Mine; 1950-01-01 to 1988-10-12; source msha-controller-operator-history
- **controller_controls_operator:** Kintzel Wayne & Jesse Et Al → Kintzel Coal Company; 1950-01-01 to 1988-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Kintzel Coal Company → Lykens #6 Mine; 1988-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kintzel Stephen Et Al → Lykens #6 Mine; 1988-10-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kintzel Stephen Et Al → Kintzel Coal Company; 1988-10-13 to current/open; source msha-controller-operator-history