# Relationship history for MSHA mine 2003529

Current hierarchy: **Neil  Zalud → Montcalm Aggregates, Inc. → Chris's 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

- **controller_controls_mine:** James A  Zalud → Chris's plant; 2006-08-28 to 2019-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Montcalm Aggregates, Inc. → Chris's plant; 2016-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Zalud → Montcalm Aggregates, Inc.; 2016-05-05 to 2019-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Daniel  Zalud → Chris's plant; 2019-02-27 to 2022-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Zalud → Montcalm Aggregates, Inc.; 2019-02-27 to 2022-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Neil  Zalud → Chris's plant; 2022-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil  Zalud → Montcalm Aggregates, Inc.; 2022-05-01 to current/open; source msha-controller-operator-history