# Relationship history for MSHA mine 1103163

Current hierarchy: **Steve D  Bennett; Tom D  Bennett → Alliance Materials Inc → Portable Plant #6**

- 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:** Tom  Bennett → Portable Plant #6; 1995-09-20 to 2016-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Alliance Materials Inc → Portable Plant #6; 2006-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Bennett → Alliance Materials Inc; 2006-04-05 to 2016-11-28; source msha-controller-operator-history
- **controller_controls_mine:** Steve D  Bennett et al → Portable Plant #6; 2016-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve D  Bennett et al → Alliance Materials Inc; 2016-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom D  Bennett et al → Alliance Materials Inc; 2016-11-29 to current/open; source msha-controller-operator-history