# Relationship history for MSHA mine 0405636

Current hierarchy: **David Murdock Living Trust → Pacific Aggregates Inc → Portable #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

- **controller_controls_mine:** David H  Murdock → Portable #1; 2005-04-16 to 2025-06-09; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Aggregates Inc → Portable #1; 2005-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David H  Murdock → Pacific Aggregates Inc; 2005-08-25 to 2025-06-09; source msha-controller-operator-history
- **controller_controls_mine:** David Murdock Living Trust → Portable #1; 2025-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Murdock Living Trust → Pacific Aggregates Inc; 2025-06-10 to current/open; source msha-controller-operator-history