# Relationship history for MSHA mine 1002011

Current hierarchy: **Darwin W  Casper → Casper Const Inc → Power Screen**

- 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:** Casper Const Inc → Power Screen; 2001-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darwin W  Casper → Power Screen; 2001-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darwin W  Casper → Casper Const Inc; 2001-10-16 to current/open; source msha-controller-operator-history