# Relationship history for MSHA mine 3503705

Current hierarchy: **Darcy R  Jones → Jones Excavating → Hurliman 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

- **controller_controls_mine:** Darcy R  Jones → Hurliman Quarry; 2004-09-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jones Excavating → Hurliman Quarry; 2008-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darcy R  Jones → Jones Excavating; 2008-08-13 to current/open; source msha-controller-operator-history