# Relationship history for MSHA mine 5001619

Current hierarchy: **Lynden Inc → Knik Construction Co. Inc. → ARB Crusher**

- 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 → ARB Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alaska RoadBuilders → ARB Crusher; 1994-06-01 to 2015-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Davis → ARB Crusher; 1994-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Davis → Alaska RoadBuilders; 1994-06-01 to 2015-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Knik Construction Co. Inc. → ARB Crusher; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynden Inc → Knik Construction Co. Inc.; 2015-04-01 to current/open; source msha-controller-operator-history