# Relationship history for MSHA mine 4202645

Current hierarchy: **Allen  Steed; Ammond  Steed → B4 Enterprises → Excel 15 S/N 12EA0758**

- 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:** B4 Enterprises → Excel 15 S/N 12EA0758; 2015-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Allen  Steed et al → Excel 15 S/N 12EA0758; 2015-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allen  Steed et al → B4 Enterprises; 2015-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ammond  Steed et al → B4 Enterprises; 2015-05-26 to current/open; source msha-controller-operator-history