# Relationship history for MSHA mine 1700737

Current hierarchy: **Steve  McGee → STEVE MCGEE CONSTRUCTION LLC → PORTABLE JCI CRUSHER**

- 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:** Steve  McGee → PORTABLE JCI CRUSHER; 2001-10-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** STEVE MCGEE CONSTRUCTION LLC → PORTABLE JCI CRUSHER; 2002-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  McGee → STEVE MCGEE CONSTRUCTION LLC; 2002-10-30 to current/open; source msha-controller-operator-history