# Relationship history for MSHA mine 2401721

Current hierarchy: **Thurman Ward M & James Lafaver → Gila Placers → Mineral Survey 515**

- 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:** Gila Placers → Mineral Survey 515; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thurman Ward M & James Lafaver → Mineral Survey 515; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thurman Ward M & James Lafaver → Gila Placers; 1983-09-01 to current/open; source msha-controller-operator-history