# Relationship history for MSHA mine 4003023

Current hierarchy: **Bowlin Tommy → Bowlin Contracting Inc → #1**

- 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:** D & B Mining Company → #1; 1989-12-01 to 1990-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Morris Jim → #1; 1989-12-01 to 1990-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Morris Jim → D & B Mining Company; 1989-12-01 to 1990-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Bowlin Contracting Inc → #1; 1990-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowlin Tommy → #1; 1990-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowlin Tommy → Bowlin Contracting Inc; 1990-03-23 to current/open; source msha-controller-operator-history