# Relationship history for MSHA mine 3610090

Current hierarchy: **Jose L  Amaya → Amaya Stone → Choconut Quarry**

- 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:** Nittany Nova Aggregates LLC → Choconut Quarry; 2013-11-01 to 2017-07-27; source msha-controller-operator-history
- **controller_controls_mine:** King Materials Inc et al → Choconut Quarry; 2013-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** King Materials Inc et al → Nittany Nova Aggregates LLC; 2013-11-01 to 2017-07-27; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Young et al → Nittany Nova Aggregates LLC; 2013-11-01 to 2017-07-27; source msha-controller-operator-history
- **operator_operates_mine:** Amaya Stone → Choconut Quarry; 2017-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jose L  Amaya → Choconut Quarry; 2017-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose L  Amaya → Amaya Stone; 2017-07-28 to current/open; source msha-controller-operator-history