# Relationship history for MSHA mine 2301901

Current hierarchy: **Steve  Morgans → Morgans Concrete Company Incorporated → Morgans Concrete Company Incorporated**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Morgans Concrete Company Incorporated → Morgans Concrete Company Incorporated; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Morgans et al → Morgans Concrete Company Incorporated; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Morgans et al → Morgans Concrete Company Incorporated; 1984-07-01 to current/open; source msha-controller-operator-history