# Relationship history for MSHA mine 4202372

Current hierarchy: **Curt  Smuin; Byron  Gibson → Basin Wide, Inc. → Portable #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

- **controller_controls_mine:** John  Harlan → Portable #2; 2002-05-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** John Harlan Const., LLC → Portable #2; 2003-10-14 to 2004-10-21; source msha-controller-operator-history
- **controller_controls_operator:** John  Harlan → John Harlan Const., LLC; 2003-10-14 to 2004-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Basin Wide, Inc. → Portable #2; 2004-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curt  Smuin  et al → Portable #2; 2004-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curt  Smuin  et al → Basin Wide, Inc.; 2004-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Byron  Gibson  et al → Basin Wide, Inc.; 2004-10-22 to current/open; source msha-controller-operator-history