# Relationship history for MSHA mine 3402061

Current hierarchy: **Richie  Perkins → Latham Ridge Rock Inc → Latham Ridge 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:** Latham Ridge Rock Inc → Latham Ridge Quarry; 2008-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richie  Perkins → Latham Ridge Quarry; 2008-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richie  Perkins → Latham Ridge Rock Inc; 2008-01-25 to current/open; source msha-controller-operator-history