# Relationship history for MSHA mine 0600717

Current hierarchy: **Stephen K  Garrity; Thomas F  Garrity → Bourgeois & Shaw, Inc. → Portable Plant 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bourgeois & Shaw, Inc. → Portable Plant 1; 2004-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas F  Garrity  et al → Portable Plant 1; 2004-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas F  Garrity  et al → Bourgeois & Shaw, Inc.; 2004-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen K  Garrity  et al → Bourgeois & Shaw, Inc.; 2004-06-02 to current/open; source msha-controller-operator-history