# Relationship history for MSHA mine 0405210

Current hierarchy: **Mike  Connors; Janie  Connors → Sepulveda Building Materials Lompoc Inc → Acin Ranch**

- 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:** Sepulveda Building Materials Lompoc Inc → Acin Ranch; 1993-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mike  Connors et al → Acin Ranch; 1993-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Connors et al → Sepulveda Building Materials Lompoc Inc; 1993-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janie  Connors et al → Sepulveda Building Materials Lompoc Inc; 1993-05-01 to current/open; source msha-controller-operator-history