# Relationship history for MSHA mine 1601595

Current hierarchy: **Cody  Fortier → Rigid Constructors → West La. Materials**

- 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:** Rigid Constructors → West La. Materials; 2020-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cody  Fortier → West La. Materials; 2020-12-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cody  Fortier → Rigid Constructors; 2020-12-04 to current/open; source msha-controller-operator-history