# Relationship history for MSHA mine 5002042

Current hierarchy: **Lynden Inc → Knik Construction → Knik Portable**

- 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:** Lynden Inc → Knik Portable; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William P  Harris → Knik Portable; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harris Sand & Gravel → Knik Portable; 2015-10-15 to 2025-11-17; source msha-controller-operator-history
- **controller_controls_operator:** William P  Harris → Harris Sand & Gravel; 2015-10-15 to 2025-11-17; source msha-controller-operator-history
- **operator_operates_mine:** Knik Construction → Knik Portable; 2025-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynden Inc → Knik Construction; 2025-11-18 to current/open; source msha-controller-operator-history