# Relationship history for MSHA mine 2602811

Current hierarchy: **Michael W  Lattin → CANYON CONSTRUCTION CO. → KOLBERG PIONEER 3144 PORTABLE JAW CRUSHE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Michael W  Lattin → KOLBERG PIONEER 3144 PORTABLE JAW CRUSHE; 1997-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CANYON CONSTRUCTION CO. → KOLBERG PIONEER 3144 PORTABLE JAW CRUSHE; 2017-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  Lattin → CANYON CONSTRUCTION CO.; 2017-04-19 to current/open; source msha-controller-operator-history