# Relationship history for MSHA mine 3003261

Current hierarchy: **1442246 AB Ltd → CSI Sands NE Ltd → BUFFALO DOCK**

- 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:** Buffalo Dock Forwarders Inc → BUFFALO DOCK; 1999-03-01 to 2017-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Sand Products Corp → BUFFALO DOCK; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sand Products Corp → Buffalo Dock Forwarders Inc; 1999-03-01 to 2017-12-14; source msha-controller-operator-history
- **controller_controls_mine:** 1442246 AB Ltd → BUFFALO DOCK; 2017-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CSI Sands NE Ltd → BUFFALO DOCK; 2017-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** 1442246 AB Ltd → CSI Sands NE Ltd; 2017-12-15 to current/open; source msha-controller-operator-history