# Relationship history for MSHA mine 0405465

Current hierarchy: **Al  Surian → Larimer-Surian Construction Inc → VIEWLAND 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

- **operator_operates_mine:** Larimer-Surian Construction Inc → VIEWLAND PIT; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Al  Surian et al → VIEWLAND PIT; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Al  Surian et al → Larimer-Surian Construction Inc; 2000-11-01 to current/open; source msha-controller-operator-history