# Relationship history for MSHA mine 3304723

Current hierarchy: **Jim  Romig → JIM ROMIG EXCAVATING → JIM ROMIG EXCAVATING**

- 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:** Jim Romig Excavating → JIM ROMIG EXCAVATING; 2016-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim  Romig → JIM ROMIG EXCAVATING; 2016-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim  Romig → Jim Romig Excavating; 2016-01-07 to current/open; source msha-controller-operator-history