# Relationship history for MSHA mine 1504104

Current hierarchy: **Jackson Roy Dan → Kenta Energy Inc → Kenta Energy 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

- **operator_operates_mine:** Helen Ann Coal Company Inc → Kenta Energy No 1 Mine; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Jimmy  Blanton → Kenta Energy No 1 Mine; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Jimmy  Blanton → Helen Ann Coal Company Inc; 1950-01-01 to 1978-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Kenta Energy Inc → Kenta Energy No 1 Mine; 1978-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Roy Dan → Kenta Energy No 1 Mine; 1978-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Roy Dan → Kenta Energy Inc; 1978-05-17 to current/open; source msha-controller-operator-history