# Relationship history for MSHA mine 2402755

Current hierarchy: **Monte K  Weeden → MK Weeden Construction → Secondary 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:** Monte K  Weeden → Secondary Crusher; 2003-06-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** MK Weeden Construction → Secondary Crusher; 2020-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monte K  Weeden → MK Weeden Construction; 2020-08-06 to current/open; source msha-controller-operator-history