# Relationship history for MSHA mine 1601294

Current hierarchy: **Ladd  Spring; Mark  Spring → Louisiana Cement Products LLC → Baton Rouge 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Eugene J  Poche Jr → Baton Rouge Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Easy Crete Inc → Baton Rouge Plant; 1995-10-01 to 1999-02-09; source msha-controller-operator-history
- **controller_controls_operator:** Eugene J  Poche Jr → Easy Crete Inc; 1995-10-01 to 1999-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Baton Rouge Cement Products Inc → Baton Rouge Plant; 1999-02-10 to 1999-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Ronald D  Comeaux → Baton Rouge Plant; 1999-02-10 to 1999-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Ronald D  Comeaux → Baton Rouge Cement Products Inc; 1999-02-10 to 1999-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Louisiana Cement Products LLC → Baton Rouge Plant; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark  Spring → Baton Rouge Plant; 1999-07-01 to 2014-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Clark  Spring → Louisiana Cement Products LLC; 1999-07-01 to 2014-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Spring et al → Baton Rouge Plant; 2014-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Spring et al → Louisiana Cement Products LLC; 2014-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ladd  Spring et al → Louisiana Cement Products LLC; 2014-04-02 to current/open; source msha-controller-operator-history