# Relationship history for MSHA mine 2003144

Current hierarchy: **Mark A  Fennema; Julie  Fennema → Custom Crushing & Recycle → CUSTOM CRUSHING & RECYCLE**

- 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:** Custom Crushing & Recycle → CUSTOM CRUSHING & RECYCLE; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark A  Fennema  et al → CUSTOM CRUSHING & RECYCLE; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark A  Fennema  et al → Custom Crushing & Recycle; 1999-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Julie  Fennema  et al → Custom Crushing & Recycle; 1999-11-01 to current/open; source msha-controller-operator-history