# Relationship history for MSHA mine 4104360

Current hierarchy: **Jim  Andoga; Tim  Creson → Austin Bridge & Road LP → Weir Quarry**

- 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:** Austin Bridge & Road LP → Weir Quarry; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tim  Creson  et al → Weir Quarry; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Creson  et al → Austin Bridge & Road LP; 2002-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Andoga  et al → Austin Bridge & Road LP; 2002-04-01 to current/open; source msha-controller-operator-history