# Relationship history for MSHA mine 3401892

Current hierarchy: **Larry  Mann → Obsorn Stone Co., Inc. → Canadian River #1**

- 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:** Larry  Mann → Canadian River #1; 1999-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Obsorn Stone Co., Inc. → Canadian River #1; 2002-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Mann → Obsorn Stone Co., Inc.; 2002-08-23 to current/open; source msha-controller-operator-history