# Relationship history for MSHA mine 4003187

Current hierarchy: **Russell D  Zollinger → Majestic Products, Inc. → Laurelbrook Quarry**

- 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:** Majestic Stone, Inc → Laurelbrook Quarry; 2002-03-20 to 2006-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Alfred  Irwin → Laurelbrook Quarry; 2002-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfred  Irwin → Majestic Stone, Inc; 2002-03-20 to 2006-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Majestic Products, Inc. → Laurelbrook Quarry; 2006-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daryll E  Ellis et al → Laurelbrook Quarry; 2006-05-17 to 2020-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Daryll E  Ellis et al → Majestic Products, Inc.; 2006-05-17 to 2020-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Russell D  Zollinger et al → Majestic Products, Inc.; 2006-05-17 to 2020-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Russell D  Zollinger → Laurelbrook Quarry; 2020-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell D  Zollinger → Majestic Products, Inc.; 2020-01-06 to current/open; source msha-controller-operator-history