# Relationship history for MSHA mine 4801684

Current hierarchy: **Steven  Gerber → Dan Hart Patrol Service LLC → Screen Number 2**

- 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:** Dan E  Hart → Screen Number 2; 2004-10-19 to 2016-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Dan Hart Patrol Service LLC → Screen Number 2; 2005-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan E  Hart → Dan Hart Patrol Service LLC; 2005-08-26 to 2016-03-24; source msha-controller-operator-history
- **controller_controls_mine:** Steven  Gerber → Screen Number 2; 2016-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven  Gerber → Dan Hart Patrol Service LLC; 2016-03-25 to current/open; source msha-controller-operator-history