# Relationship history for MSHA mine 4300578

Current hierarchy: **Terry A  Ebelt → VT STONE SALES, INC. → CHESTER 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:** VT Stone Sales, Inc. → CHESTER QUARRY; 2002-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry A  Ebelt → CHESTER QUARRY; 2002-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry A  Ebelt → VT Stone Sales, Inc.; 2002-05-23 to current/open; source msha-controller-operator-history