# Relationship history for MSHA mine 0405798

Current hierarchy: **Mile  Grbic → Santa Paula Materials → Santa Paula Materials**

- 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:** Santa Paula Rock, Gravel & Sand LLC → Santa Paula Materials; 2010-03-12 to 2012-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Mile  Grbic et al → Santa Paula Materials; 2010-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mile  Grbic et al → Santa Paula Rock, Gravel & Sand LLC; 2010-03-12 to 2012-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Solrick LLC et al → Santa Paula Rock, Gravel & Sand LLC; 2010-03-12 to 2012-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Santa Paula Materials → Santa Paula Materials; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mile  Grbic → Santa Paula Materials; 2012-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mile  Grbic → Santa Paula Materials; 2012-01-05 to current/open; source msha-controller-operator-history