# Relationship history for MSHA mine 3608653

Current hierarchy: **Scott A  Dunn → Dunn Flagstone → Dunn Flagstone**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Charles Johnson Quarry → Dunn Flagstone; 1997-06-01 to 2003-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Charles E → Dunn Flagstone; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Charles E → Charles Johnson Quarry; 1997-06-01 to 2003-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Scott A  Dunn → Dunn Flagstone; 1999-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dunn Flagstone → Dunn Flagstone; 2003-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott A  Dunn → Dunn Flagstone; 2003-07-17 to current/open; source msha-controller-operator-history