# Relationship history for MSHA mine 4103986

Current hierarchy: **Bailey County-TX → County Of Bailey → BAILY COUNTY PRT #2 CALICHE 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** County Of Bailey → BAILY COUNTY PRT #2 CALICHE PIT; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bailey County-TX → BAILY COUNTY PRT #2 CALICHE PIT; 1998-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey County-TX → County Of Bailey; 1998-03-01 to current/open; source msha-controller-operator-history