# Relationship history for MSHA mine 5400305

Current hierarchy: **Hector  Golderos Maldonado → Hardrock Quarry → Hard Rock Quarry**

- 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:** Byblos Development Corp → Hard Rock Quarry; 1988-03-01 to 1989-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Jussef M  Gabib → Hard Rock Quarry; 1988-03-01 to 1989-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Jussef M  Gabib → Byblos Development Corp; 1988-03-01 to 1989-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Canteras Del Sur Inc → Hard Rock Quarry; 1989-07-18 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Francisco Barnes  (Rangel) → Hard Rock Quarry; 1989-07-18 to 1996-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Francisco Barnes  (Rangel) → Canteras Del Sur Inc; 1989-07-18 to 1996-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Hardrock Quarry → Hard Rock Quarry; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hector  Golderos Maldonado → Hard Rock Quarry; 1996-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hector  Golderos Maldonado → Hardrock Quarry; 1996-05-01 to current/open; source msha-controller-operator-history