# Relationship history for MSHA mine 3610176

Current hierarchy: **King Materials Inc; Richard C  Young → Nittany Nova Aggregates → Arnold 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

- **controller_controls_mine:** Richard C  Young et al → Arnold Quarry; 2013-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nittany Nova Aggregates → Arnold Quarry; 2016-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Young et al → Nittany Nova Aggregates; 2016-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** King Materials Inc et al → Nittany Nova Aggregates; 2016-03-31 to current/open; source msha-controller-operator-history