# Relationship history for MSHA mine 1518661

Current hierarchy: **Aaron C  Montgomery → Alhambry Investments LLC → T&W #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:** T & W   Enterprises L L C → T&W #1; 2003-08-20 to 2004-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Billy M  Ward → T&W #1; 2003-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy M  Ward → T & W   Enterprises L L C; 2003-08-20 to 2004-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Alhambry Investments LLC → T&W #1; 2004-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aaron C  Montgomery et al → T&W #1; 2004-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron C  Montgomery et al → Alhambry Investments LLC; 2004-08-26 to current/open; source msha-controller-operator-history