# Relationship history for MSHA mine 4002730

Current hierarchy: **David M Rose → Tennessee Building Stone, Inc → Dunn Quarries**

- 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:** Tennessee Building Stone, Inc → Dunn Quarries; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David M Rose et al → Dunn Quarries; 1981-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David M Rose et al → Tennessee Building Stone, Inc; 1981-02-01 to current/open; source msha-controller-operator-history