# Relationship history for MSHA mine 3901307

Current hierarchy: **L G Everist Inc → L.G. Everist, Inc. → Nelson 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:** L G Everist Inc → Nelson Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lynette Sue  Unzelman → Nelson Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Myrl & Roys Paving Inc → Nelson Mine; 1984-08-01 to 2021-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Lynette Sue  Unzelman → Myrl & Roys Paving Inc; 1984-08-01 to 2021-03-14; source msha-controller-operator-history
- **operator_operates_mine:** L.G. Everist, Inc. → Nelson Mine; 2021-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L G Everist Inc → L.G. Everist, Inc.; 2021-03-15 to current/open; source msha-controller-operator-history