# Relationship history for MSHA mine 0405484

Current hierarchy: **Ed  Steinhoff; Walt  Moody → Steinhoff & Moody Heavy Equipment → STEINHOFF & MOODY HEAVY EQUIP**

- 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:** Steinhoff & Moody Heavy Equipment → STEINHOFF & MOODY HEAVY EQUIP; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ed  Steinhoff et al → STEINHOFF & MOODY HEAVY EQUIP; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ed  Steinhoff et al → Steinhoff & Moody Heavy Equipment; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walt  Moody  et al → Steinhoff & Moody Heavy Equipment; 2001-06-01 to current/open; source msha-controller-operator-history