# Relationship history for MSHA mine 0404690

Current hierarchy: **Boral Limited → Boral Resources Inc → Soboba Pit**

- 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

- **controller_controls_mine:** Sprinkel Warren Reed → Soboba Pit; 1950-01-01 to 1988-06-09; source msha-controller-operator-history
- **operator_operates_mine:** North Mountain Materials → Soboba Pit; 1984-02-01 to 1986-09-17; source msha-controller-operator-history
- **controller_controls_mine:** Elliott Construction & Intermac Corp → Soboba Pit; 1984-02-01 to 1986-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Elliott Construction & Intermac Corp → North Mountain Materials; 1984-02-01 to 1986-09-17; source msha-controller-operator-history
- **operator_operates_mine:** Fontana Paving Inc → Soboba Pit; 1986-09-18 to 1988-06-09; source msha-controller-operator-history
- **controller_controls_operator:** Sprinkel Warren Reed → Fontana Paving Inc; 1986-09-18 to 1988-06-09; source msha-controller-operator-history
- **controller_controls_mine:** Boral Limited → Soboba Pit; 1988-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boral Resources Inc → Soboba Pit; 1988-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boral Limited → Boral Resources Inc; 1988-06-10 to current/open; source msha-controller-operator-history