# Relationship history for MSHA mine 5001598

Current hierarchy: **Samuel  Nappi → United Energy Group → Jonesville Coal 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:** Hobbs Industries Incorporated → Jonesville Coal Mine; 1990-05-01 to 1996-01-09; source msha-controller-operator-history
- **controller_controls_mine:** Hobbs Randy → Jonesville Coal Mine; 1990-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobbs Randy → Hobbs Industries Incorporated; 1990-05-01 to 1996-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Nerox Power Systems Inc → Jonesville Coal Mine; 1996-01-10 to 1999-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Nerox Energy Corp → Jonesville Coal Mine; 1996-01-10 to 1999-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Nerox Energy Corp → Nerox Power Systems Inc; 1996-01-10 to 1999-07-20; source msha-controller-operator-history
- **operator_operates_mine:** United Energy Group Inc → Jonesville Coal Mine; 1999-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Samuel  Nappi → Jonesville Coal Mine; 1999-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Samuel  Nappi → United Energy Group Inc; 1999-07-21 to current/open; source msha-controller-operator-history