# Relationship history for MSHA mine 4105259

Current hierarchy: **Richard Guy  Newell → Cowboy Construction → FT 4250**

- 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:** Richard Guy  Newell → FT 4250; 2016-05-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cowboy Construction → FT 4250; 2017-05-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard Guy  Newell → Cowboy Construction; 2017-05-22 to current/open; source msha-controller-operator-history