# Relationship history for MSHA mine 0103347

Current hierarchy: **Dunn Investment Company → Dunn Construction Company → Dunn Construction Company**

- 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

- **controller_controls_mine:** Bradford H O'Dell → Dunn Construction Company; 1998-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** North Montgomery Materials LLC → Dunn Construction Company; 2006-06-14 to 2025-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Bradford H O'Dell → North Montgomery Materials LLC; 2006-06-14 to 2025-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Dunn Construction Company → Dunn Construction Company; 2025-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dunn Investment Company → Dunn Construction Company; 2025-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dunn Investment Company → Dunn Construction Company; 2025-08-29 to current/open; source msha-controller-operator-history