# Relationship history for MSHA mine 2103422

Current hierarchy: **Roy L  Sherlock; Jerry G  Sherlock → Sherlock Trucking → Crusher**

- 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

- **controller_controls_mine:** Roy L  Sherlock et al → Crusher; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sherlock Trucking → Crusher; 2004-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy L  Sherlock et al → Sherlock Trucking; 2004-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry G  Sherlock et al → Sherlock Trucking; 2004-05-11 to current/open; source msha-controller-operator-history