# Relationship history for MSHA mine 3503840

Current hierarchy: **Brian  Scallon → Brothers Excavation & Construction, LLC → Pegson**

- 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:** P.K Manufacturing, Inc. → Pegson; 2016-05-10 to 2018-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Scallon et al → Pegson; 2016-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Scallon et al → P.K Manufacturing, Inc.; 2016-05-10 to 2018-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Brothers Excavation & Construction, LLC → Pegson; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  Scallon et al → Pegson; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  Scallon et al → Brothers Excavation & Construction, LLC; 2018-07-19 to current/open; source msha-controller-operator-history