# Relationship history for MSHA mine 4104663

Current hierarchy: **Marcus  Herrera; Terry  Hudson → BEC Materials LLC → BEC Materials**

- 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:** BEC Materials LLC → BEC Materials; 2007-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marcus  Herrera  et al → BEC Materials; 2007-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcus  Herrera  et al → BEC Materials LLC; 2007-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Hudson  et al → BEC Materials LLC; 2007-05-15 to current/open; source msha-controller-operator-history