# Relationship history for MSHA mine 2902178

Current hierarchy: **State Of New Mexico → New Mexico Department of Transportation → Candelaria Pit**

- 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 & Transportation Dept → Candelaria Pit; 1998-08-01 to 2008-01-22; source msha-controller-operator-history
- **controller_controls_mine:** State Of New Mexico → Candelaria Pit; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of New Mexico → New Mexico State Highway & Transportation Dept; 1998-08-01 to 2008-01-22; source msha-controller-operator-history
- **operator_operates_mine:** New Mexico Department of Transportation → Candelaria Pit; 2008-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** State Of New Mexico → Candelaria Pit; 2008-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of New Mexico → New Mexico Department of Transportation; 2008-01-23 to current/open; source msha-controller-operator-history