# Relationship history for MSHA mine 5100019

Current hierarchy: **Pohaku Paa LLC → HC&D, LLC → Kapaa Quarry And Mill**

- 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:** Ameron Hawaii → Kapaa Quarry And Mill; 1950-01-01 to 2014-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Ameron International Corp → Kapaa Quarry And Mill; 1950-01-01 to 2013-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Ameron International Corp → Ameron Hawaii; 1950-01-01 to 2013-01-31; source msha-controller-operator-history
- **controller_controls_mine:** National Oilwell Varco Inc → Kapaa Quarry And Mill; 2013-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** National Oilwell Varco Inc → Ameron Hawaii; 2013-02-01 to 2014-06-30; source msha-controller-operator-history
- **operator_operates_mine:** HC&D, LLC → Kapaa Quarry And Mill; 2014-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pohaku Paa LLC → Kapaa Quarry And Mill; 2014-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pohaku Paa LLC → HC&D, LLC; 2014-07-01 to current/open; source msha-controller-operator-history