# Relationship history for MSHA mine 0405427

Current hierarchy: **Frank  Dutra → NorCal Recycled Rock & Aggregates Inc → Cleland Bar**

- 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:** Enterra Remediation Inc → Cleland Bar; 2000-10-01 to 2003-05-24; source msha-controller-operator-history
- **controller_controls_mine:** E A  Koch → Cleland Bar; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** E A  Koch → Enterra Remediation Inc; 2000-10-01 to 2003-05-24; source msha-controller-operator-history
- **operator_operates_mine:** NorCal Recycled Rock & Aggregates Inc → Cleland Bar; 2003-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frank  Dutra et al → Cleland Bar; 2003-05-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frank  Dutra et al → NorCal Recycled Rock & Aggregates Inc; 2003-05-25 to current/open; source msha-controller-operator-history