# Relationship history for MSHA mine 0405454

Current hierarchy: **Kevin J  Lunny → Lunny Grading & Paving Inc → Nicasio 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:** Lunny Grading & Paving Inc → Nicasio Rock Quarry; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin J  Lunny et al → Nicasio Rock Quarry; 2000-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin J  Lunny et al → Lunny Grading & Paving Inc; 2000-07-01 to current/open; source msha-controller-operator-history