# Relationship history for MSHA mine 4105843

Current hierarchy: **Alvarez Road Aggregate LLC; Blue Rock Materials LLC → Iron Rock Aggregates JV → Iron Rock Starr 1**

- 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:** Alvarez Road Aggregates LLC → Iron Rock Starr 1; 2026-01-21 to 2026-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Juan R  Gonzalez → Iron Rock Starr 1; 2026-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Juan R  Gonzalez → Alvarez Road Aggregates LLC; 2026-01-21 to 2026-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Iron Rock Aggregates JV → Iron Rock Starr 1; 2026-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alvarez Road Aggregate LLC et al → Iron Rock Starr 1; 2026-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alvarez Road Aggregate LLC et al → Iron Rock Aggregates JV; 2026-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blue Rock Materials LLC et al → Iron Rock Aggregates JV; 2026-05-01 to current/open; source msha-controller-operator-history