# Relationship history for MSHA mine 2602294

Current hierarchy: **Robert L  Mc Vane; Sarah E  Mc Vane → R L M Aggregate Materials Inc → E X T E C**

- 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:** R L M Aggregate Materials Inc → E X T E C; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sarah E  Mc Vane  et al → E X T E C; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sarah E  Mc Vane  et al → R L M Aggregate Materials Inc; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert L  Mc Vane  et al → R L M Aggregate Materials Inc; 1996-07-01 to current/open; source msha-controller-operator-history