# Relationship history for MSHA mine 4404612

Current hierarchy: **Bobby Gene  Yates → Triple Y Coal Corp → No 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

- **controller_controls_mine:** Looney Ernest & Kendall → No 1 Mine; 1975-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & K Coal Co Inc → No 1 Mine; 1976-12-01 to 1977-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Looney Ernest & Kendall → E & K Coal Co Inc; 1976-12-01 to 1977-09-18; source msha-controller-operator-history
- **operator_operates_mine:** Triple Y Coal Corp → No 1 Mine; 1977-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bobby Gene  Yates → No 1 Mine; 1977-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby Gene  Yates → Triple Y Coal Corp; 1977-09-19 to current/open; source msha-controller-operator-history