# Relationship history for MSHA mine 0401842

Current hierarchy: **Cook Shannon → Mission Viejo Materials Inc → Mission Viejo Materials Incorporated**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Livingston-Graham → Mission Viejo Materials Incorporated; 1950-01-01 to 1985-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Gulf + Western Industries Inc → Mission Viejo Materials Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gulf + Western Industries Inc → Livingston-Graham; 1950-01-01 to 1985-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul J Hubbs et al → Mission Viejo Materials Incorporated; 1984-05-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ortega Rock Quarry → Mission Viejo Materials Incorporated; 1985-08-01 to 1988-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Paul J Hubbs et al → Ortega Rock Quarry; 1985-08-01 to 1988-11-27; source msha-controller-operator-history
- **controller_controls_operator:** John R Schmutz et al → Ortega Rock Quarry; 1985-08-01 to 1988-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Mission Viejo Materials Inc → Mission Viejo Materials Incorporated; 1988-11-28 to 1994-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Lemieux Howard R → Mission Viejo Materials Incorporated; 1988-11-28 to 1994-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Lemieux Howard R → Mission Viejo Materials Inc; 1988-11-28 to 1994-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mission Viejo Materials Inc → Mission Viejo Materials Incorporated; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cook Shannon → Mission Viejo Materials Incorporated; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cook Shannon → Mission Viejo Materials Inc; 1994-05-01 to current/open; source msha-controller-operator-history