# Relationship history for MSHA mine 0403110

Current hierarchy: **Linden H  Chandler → Chandler'S Palos Verdes Sand & Gravel Company → Chandlers Palos Verdes Sand And Gravel C**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Chandler'S Palos Verdes Sand & Gravel Company → Chandlers Palos Verdes Sand And Gravel C; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Linden H  Chandler → Chandlers Palos Verdes Sand And Gravel C; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linden H  Chandler → Chandler'S Palos Verdes Sand & Gravel Company; 1950-01-01 to current/open; source msha-controller-operator-history