# Relationship history for MSHA mine 4103982

Current hierarchy: **Randall County-Tx → Randall County Road Department → RANDALL COUNTY 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:** Randall County Road Department → RANDALL COUNTY PIT; 1998-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randall County-Tx → RANDALL COUNTY PIT; 1998-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randall County-Tx → Randall County Road Department; 1998-02-01 to current/open; source msha-controller-operator-history