# Relationship history for MSHA mine 0400247

Current hierarchy: **Taylor  Rasmussen → Rasmussen R&R Inc. → Rasmussen Soledad Rock 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Schmidt Nancy → Rasmussen Soledad Rock Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Schmidt Construction Inc → Rasmussen Soledad Rock Quarry; 1979-12-01 to 1990-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Schmidt Nancy → Schmidt Construction Inc; 1979-12-01 to 1990-02-11; source msha-controller-operator-history
- **operator_operates_mine:** C A Rasmussen Company → Rasmussen Soledad Rock Quarry; 1990-02-12 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Rasmussen et al → Rasmussen Soledad Rock Quarry; 1990-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Rasmussen et al → C A Rasmussen Company; 1990-02-12 to 2007-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Rasmussen et al → C A Rasmussen Company; 1990-02-12 to 2007-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Rasmussen R&R Inc. → Rasmussen Soledad Rock Quarry; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Taylor  Rasmussen → Rasmussen Soledad Rock Quarry; 2008-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Taylor  Rasmussen → Rasmussen R&R Inc.; 2008-01-01 to current/open; source msha-controller-operator-history