# Relationship history for MSHA mine 0405078

Current hierarchy: **Chuck  Perrault → Smc/Soboba Materials Company → Smc/Soboba Materials Company**

- 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:** Soboba Materials Company → Smc/Soboba Materials Company; 1990-02-01 to 1992-05-19; source msha-controller-operator-history
- **controller_controls_mine:** Soboba Band Mission Indians → Smc/Soboba Materials Company; 1990-02-01 to 1992-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Soboba Band Mission Indians → Soboba Materials Company; 1990-02-01 to 1992-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Smc/Soboba Materials Company → Smc/Soboba Materials Company; 1992-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chuck  Perrault → Smc/Soboba Materials Company; 1992-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chuck  Perrault → Smc/Soboba Materials Company; 1992-05-20 to current/open; source msha-controller-operator-history