# Relationship history for MSHA mine 2901724

Current hierarchy: **Lincoln Mine Of Nevada → Lincoln Mine Of Nevada → Lincoln Of Nevada Pits Mill**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Lincoln Mine Of Nevada → Lincoln Of Nevada Pits Mill; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lincoln Mine Of Nevada → Lincoln Of Nevada Pits Mill; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lincoln Mine Of Nevada → Lincoln Mine Of Nevada; 1978-03-09 to current/open; source msha-controller-operator-history