# Relationship history for MSHA mine 1601236

Current hierarchy: **Fitzgerald Michael R → Louisiana Aggregate Resources Inc → Carloss/Herring**

- 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:** Louisiana Aggregate Resources Inc → Carloss/Herring; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fitzgerald Michael R → Carloss/Herring; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fitzgerald Michael R → Louisiana Aggregate Resources Inc; 1992-02-01 to current/open; source msha-controller-operator-history