# Relationship history for MSHA mine 4104869

Current hierarchy: **Cary  Clark; Richard  LeMay → Southwest Integrated Enterprises Inc. → Rock Crusher 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Southwest Integrated Enterprises Inc. → Rock Crusher 1; 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard  LeMay et al → Rock Crusher 1; 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard  LeMay et al → Southwest Integrated Enterprises Inc.; 2011-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cary  Clark et al → Southwest Integrated Enterprises Inc.; 2011-04-26 to current/open; source msha-controller-operator-history