# Relationship history for MSHA mine 1202442

Current hierarchy: **G Avenue Development LLC; Monon Aggregate Ventures Inc → Northgate Aggregates → Monon 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:** Northgate Aggregates → Monon Quarry; 2010-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** G Avenue Development LLC et al → Monon Quarry; 2010-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** G Avenue Development LLC et al → Northgate Aggregates; 2010-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monon Aggregate Ventures Inc et al → Northgate Aggregates; 2010-10-01 to current/open; source msha-controller-operator-history