# Relationship history for MSHA mine 0405358

Current hierarchy: **Randy J  Howarth; William I  Sliger → Aggregate Material Processing Inc → AGGREGATE MATERIAL PROCESSING IN**

- 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:** Randy J  Howarth  et al → AGGREGATE MATERIAL PROCESSING IN; 1997-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggregate Material Processing Inc → AGGREGATE MATERIAL PROCESSING IN; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy J  Howarth  et al → Aggregate Material Processing Inc; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William I  Sliger  et al → Aggregate Material Processing Inc; 1999-02-01 to current/open; source msha-controller-operator-history