# Relationship history for MSHA mine 2401725

Current hierarchy: **Nugent George A-John F Ratchye & Emerson W Scott → Nrs Inc → Lincoln Gulch 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:** Nugent George A-John F Ratchye & Emerson W Scott → Lincoln Gulch Mine; 1983-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rudio & Associates → Lincoln Gulch Mine; 1983-06-01 to 1984-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Rudio Robert → Lincoln Gulch Mine; 1983-06-01 to 1984-07-16; source msha-controller-operator-history
- **controller_controls_operator:** Rudio Robert → Rudio & Associates; 1983-06-01 to 1984-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Nrs Inc → Lincoln Gulch Mine; 1984-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nugent George A-John F Ratchye & Emerson W Scott → Nrs Inc; 1984-07-17 to current/open; source msha-controller-operator-history