# Relationship history for MSHA mine 4407408

Current hierarchy: **Ultra Transport LLC; Jim Richardson Trucking & Construction LLC etal → Auger Coal, LLC → Hill Creek Auger**

- 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:** Auger Coal, LLC → Hill Creek Auger; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jim Richardson Trucking & Construction LLC etal → Hill Creek Auger; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim Richardson Trucking & Construction LLC etal → Auger Coal, LLC; 2021-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ultra Transport LLC et al → Auger Coal, LLC; 2021-07-13 to current/open; source msha-controller-operator-history