# Relationship history for MSHA mine 0302027

Current hierarchy: **Ivan  Crossland → Crossland Construction Company → Hwy 412 Bypass Project**

- 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

- **operator_operates_mine:** Crossland Construction Company → Hwy 412 Bypass Project; 2012-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ivan  Crossland → Hwy 412 Bypass Project; 2012-01-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ivan  Crossland → Crossland Construction Company; 2012-01-31 to current/open; source msha-controller-operator-history