# Relationship history for MSHA mine 1002103

Current hierarchy: **Bradley A  Pugh → Pugh Brothers Construction, Inc. → Pugh Portable Unit #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:** Bradley A  Pugh et al → Pugh Portable Unit #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pugh Brothers Construction, Inc. → Pugh Portable Unit #2; 2006-11-20 to 2009-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Bradley A  Pugh et al → Pugh Brothers Construction, Inc.; 2006-11-20 to 2009-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Pugh Brothers Construction, Inc. → Pugh Portable Unit #2; 2009-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bradley A  Pugh et al → Pugh Portable Unit #2; 2009-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley A  Pugh et al → Pugh Brothers Construction, Inc.; 2009-05-15 to current/open; source msha-controller-operator-history