# Relationship history for MSHA mine 5001826

Current hierarchy: **Roscoe G  Bicknell IV → Bicknell Inc → Pegson Portable**

- 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:** Roscoe G  Bicknell IV → Pegson Portable; 1999-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bicknell Inc → Pegson Portable; 2005-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roscoe G  Bicknell IV → Bicknell Inc; 2005-09-22 to current/open; source msha-controller-operator-history