# Relationship history for MSHA mine 2200818

Current hierarchy: **Jaime S M  French → Dunn Roadbuilders LLC → Columbia Plant**

- 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:** Jaime S M  French → Columbia Plant; 1996-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dunn Roadbuilders LLC → Columbia Plant; 2014-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jaime S M  French → Dunn Roadbuilders LLC; 2014-06-26 to current/open; source msha-controller-operator-history