# Relationship history for MSHA mine 3300045

Current hierarchy: **Zachary A  Carpenter → Cleveland Stone Companies LLC → Cleveland Quarries**

- 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:** Cleveland Quarries Company → Cleveland Quarries; 1950-01-01 to 1992-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Standard Slag Company → Cleveland Quarries; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Standard Slag Company → Cleveland Quarries Company; 1950-01-01 to 1992-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Cleveland Quarries → Cleveland Quarries; 1992-12-15 to 2007-12-19; source msha-controller-operator-history
- **controller_controls_mine:** American Stone Corp → Cleveland Quarries; 1992-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Stone Corp → Cleveland Quarries; 1992-12-15 to 2007-12-19; source msha-controller-operator-history
- **operator_operates_mine:** IRG Operating LLC → Cleveland Quarries; 2007-12-20 to 2021-08-31; source msha-controller-operator-history
- **controller_controls_mine:** IRG Stone LLC → Cleveland Quarries; 2007-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** IRG Stone LLC → IRG Operating LLC; 2007-12-20 to 2021-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Cleveland Stone Companies LLC → Cleveland Quarries; 2021-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zachary A  Carpenter → Cleveland Quarries; 2021-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zachary A  Carpenter → Cleveland Stone Companies LLC; 2021-09-01 to current/open; source msha-controller-operator-history