# Relationship history for MSHA mine 3401730

Current hierarchy: **Texas County-Ok → Texas County → TEXAS COUNTY PIT 2**

- 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:** Texas County → TEXAS COUNTY PIT 2; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Texas County-Ok → TEXAS COUNTY PIT 2; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Texas County-Ok → Texas County; 1990-10-01 to current/open; source msha-controller-operator-history