# Relationship history for MSHA mine 3901500

Current hierarchy: **SFI International USA Inc → Bulk Transport Company East, Inc. → State Shale Pit #2**

- 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:** Bulk Transport Company West, Inc. → State Shale Pit #2; 2004-11-01 to 2025-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Shane L  Aulick → State Shale Pit #2; 2004-11-01 to 2019-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Shane L  Aulick → Bulk Transport Company West, Inc.; 2004-11-01 to 2019-03-31; source msha-controller-operator-history
- **controller_controls_mine:** SFI International USA Inc → State Shale Pit #2; 2019-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SFI International USA Inc → Bulk Transport Company West, Inc.; 2019-04-01 to 2025-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Bulk Transport Company East, Inc. → State Shale Pit #2; 2025-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** SFI International USA Inc → State Shale Pit #2; 2025-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SFI International USA Inc → Bulk Transport Company East, Inc.; 2025-02-25 to current/open; source msha-controller-operator-history