# Relationship history for MSHA mine 3003174

Current hierarchy: **Steven D  Montemorano → Montemorano Bros Inc → MONTEMORANO BROS INC.**

- 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:** Montemorano Bros Inc → MONTEMORANO BROS INC.; 1996-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steven D  Montemorano → MONTEMORANO BROS INC.; 1996-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven D  Montemorano → Montemorano Bros Inc; 1996-08-01 to current/open; source msha-controller-operator-history