# Relationship history for MSHA mine 4609582

Current hierarchy: **Terry A  Parks → EAST RIVER AGGREGATES, INC → INGLESIDE PLANT**

- 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:** East River Aggregates, Inc → INGLESIDE PLANT; 2020-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Terry A  Parks → INGLESIDE PLANT; 2020-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry A  Parks → East River Aggregates, Inc; 2020-01-20 to current/open; source msha-controller-operator-history