# Relationship history for MSHA mine 4104730

Current hierarchy: **Claudia E  Hurtado-Garcia; Benito  Hurtado → City Ready Mix, Inc. → City Ready Mix, Inc.**

- 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:** Laredo Rock Tech Sand & Gravel LP → City Ready Mix, Inc.; 2008-05-12 to 2011-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Greg J  Ebe  et al → City Ready Mix, Inc.; 2008-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg J  Ebe  et al → Laredo Rock Tech Sand & Gravel LP; 2008-05-12 to 2011-02-27; source msha-controller-operator-history
- **controller_controls_operator:** Albert F  Muller III  et al → Laredo Rock Tech Sand & Gravel LP; 2008-05-12 to 2011-02-27; source msha-controller-operator-history
- **operator_operates_mine:** City Ready Mix, Inc. → City Ready Mix, Inc.; 2011-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Benito  Hurtado  et al → City Ready Mix, Inc.; 2011-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Benito  Hurtado  et al → City Ready Mix, Inc.; 2011-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Claudia E  Hurtado-Garcia  et al → City Ready Mix, Inc.; 2011-02-28 to current/open; source msha-controller-operator-history