# Relationship history for MSHA mine 0901156

Current hierarchy: **Ready Mix USA Inc → Aggregates USA LLC → Suddeth Plant**

- 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:** Ready Mix USA Inc → Suddeth Plant; 2000-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Couch Ready Mix USA Aggregates Division → Suddeth Plant; 2004-07-20 to 2009-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Ready Mix USA Inc → Couch Ready Mix USA Aggregates Division; 2004-07-20 to 2009-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ready Mix USA Inc → Suddeth Plant; 2008-01-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggregates USA LLC → Suddeth Plant; 2009-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ready Mix USA Inc → Aggregates USA LLC; 2009-04-01 to current/open; source msha-controller-operator-history