# Relationship history for MSHA mine 0404913

Current hierarchy: **Boral Limited → Boral Resources Inc → Garlock 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:** Mendel Al Jr → Garlock Pit; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Desert Construction Company → Garlock Pit; 1987-07-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Mendel Al Jr → Desert Construction Company; 1987-07-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Boral Limited → Garlock Pit; 1988-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boral Resources Inc → Garlock Pit; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boral Limited → Boral Resources Inc; 1989-04-01 to current/open; source msha-controller-operator-history