# Relationship history for MSHA mine 2901464

Current hierarchy: **State Of New Mexico → New Mexico State Highway Department → District 3 Crusher**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** New Mexico State Highway Department → District 3 Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** State Of New Mexico → District 3 Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of New Mexico → New Mexico State Highway Department; 1950-01-01 to current/open; source msha-controller-operator-history