# Relationship history for MSHA mine 1202434

Current hierarchy: **Guy C  Salisbury → Area Excavating Inc. → Aggregate Plant**

- 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:** Area Excavating Inc. → Aggregate Plant; 2010-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guy C  Salisbury → Aggregate Plant; 2010-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guy C  Salisbury → Area Excavating Inc.; 2010-08-25 to current/open; source msha-controller-operator-history