# Relationship history for MSHA mine 1601192

Current hierarchy: **Paul  Alonzo → Phoenix Associates Land Syndicate → MURPHY SAND & GRAVEL**

- 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:** Lamont L  Murphy et al → MURPHY SAND & GRAVEL; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T & M Gravel → MURPHY SAND & GRAVEL; 1989-11-01 to 1992-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Michael H  Furr et al → MURPHY SAND & GRAVEL; 1989-11-01 to 1992-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Michael H  Furr et al → T & M Gravel; 1989-11-01 to 1992-09-15; source msha-controller-operator-history
- **operator_operates_mine:** L Murphy Trucking Service Inc → MURPHY SAND & GRAVEL; 1992-09-16 to 1997-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Lamont L  Murphy et al → L Murphy Trucking Service Inc; 1992-09-16 to 1997-08-28; source msha-controller-operator-history
- **controller_controls_operator:** Cecile L  Murphy et al → L Murphy Trucking Service Inc; 1992-09-16 to 1997-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Associates Land Syndicate → MURPHY SAND & GRAVEL; 1997-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Alonzo → MURPHY SAND & GRAVEL; 1997-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Alonzo → Phoenix Associates Land Syndicate; 1997-08-29 to current/open; source msha-controller-operator-history