# Relationship history for MSHA mine 5001820

Current hierarchy: **Koniag Incorporated; Jeff  Hamilton → Hamilton Construction, LLC → Quarry King**

- 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:** Jeff  Hamilton  et al → Quarry King; 1999-10-01 to 2017-02-23; source msha-controller-operator-history
- **operator_operates_mine:** Hamilton Construction, LLC → Quarry King; 2005-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Hamilton  et al → Hamilton Construction, LLC; 2005-03-30 to 2017-02-23; source msha-controller-operator-history
- **controller_controls_operator:** Joan  Hamilton  et al → Hamilton Construction, LLC; 2005-03-30 to 2017-02-23; source msha-controller-operator-history
- **controller_controls_mine:** Koniag Incorporated et al → Quarry King; 2017-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Koniag Incorporated et al → Hamilton Construction, LLC; 2017-02-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Hamilton et al → Hamilton Construction, LLC; 2017-02-24 to current/open; source msha-controller-operator-history